Australian Flood Risk Information Portal

Transcription

1 Record 2015/17 GeoCat Australian Flood Risk Information Portal Data Entry Guidelines November 2014 Martin, S., Zeilinger, I., Middelmann-Fernandes M., Branford M., Peljo, N. APPLYING GEOSCIENCE TO AUSTRALIA S MOST IMPORTANT CHALLENGES

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3 Australian Flood Risk Information Portal Data Entry Guidelines November 2014 GEOSCIENCE AUSTRALIA RECORD 2015/17 Martin, S., Zeilinger, I., Middelmann-Fernandes M., Branford M., Peljo, N.

4 Department of Industry and Science Minister for Industry and Science: The Hon Ian Macfarlane MP Parliamentary Secretary: The Hon Karen Andrews MP Secretary: Ms Glenys Beauchamp PSM Geoscience Australia Chief Executive Officer: Dr Chris Pigram This paper is published with the permission of the CEO, Geoscience Australia Commonwealth of Australia (Geoscience Australia) 2015 With the exception of the Commonwealth Coat of Arms and where otherwise noted, this product is provided under a Creative Commons Attribution 4.0 International Licence. ( Geoscience Australia has tried to make the information in this product as accurate as possible. However, it does not guarantee that the information is totally accurate or complete. Therefore, you should not solely rely on this information when making a commercial decision. Geoscience Australia is committed to providing web accessible content wherever possible. If you are having difficulties with accessing this document please clientservices@ga.gov.au. ISSN X (PDF) ISBN (PDF) GeoCat Bibliographic reference: Martin, S., Zeilinger, I., Middelmann-Fernandes M., Branford M. and Peljo, N Australian Flood Risk Information Portal: Data Entry Guidelines November Record 2015/17. Geoscience Australia, Canberra.

5 Contents 1 Introduction Purpose Intellectual Property Permissions General Processes Obtaining a log in and changing your Account Details Should a study be entered? Overall Data Capture and Quality Review Process Home Page General Row Resources Row...13 Uploading Resources: Events Row Event Box Inundation and Hazard Mapping Boxes Flood Inundation Mapping Flood Hazard Mapping Hydraulic Modelling and Hydrological Estimate Boxes Damage Assessment Box Mitigation Row Review Page...27 Glossary...28 Data Entry Guidelines November 2014 iii

6 Figures Figure 1 Changing User Details Figure 2 Flowchart of Australian Flood Studies Database data entry process Figure 3 Homepage screenshot... 8 Figure 4 Screenshot of the General Row expanded Figure 5 Screenshot of the Resources Row Expanded Figure 6 Screenshot of the Events Row Figure 7 Screenshot shows the Event box Figure 8 Screenshot of the Inundation and Hazard Boxes Figure 9 Screenshot of the Flood Inundation Mapping Box Figure 10 Screenshot of the Mapping Tab - Flood Hazard Mapping Figure 11 Screenshot of the Hydraulic Modelling and Hydrological Estimate Boxes Figure 12 Screenshot of the Damage Assessment Box...24 Figure 13 Screenshot of the Mitigation Tab Figure 14 Screenshot of Review Page iv Data Entry Guidelines November 2014

7 Tables Table 1 General Row field descriptions and guidance Table 2 Resources Row fields and guidance...16 Table 3 Events Row - Event Box fields and guidance...19 Table 4 Events Row - Flood Inundation Mapping Box fields and guidance...21 Table 5 Events Row - Flood Hazard Mapping Box fields and guidance...22 Table 6 Events Row - Hydraulic Modelling Box fields and guidance...23 Table 7 Events Row - Damage Assessment Box fields and guidance...25 Data Entry Guidelines November 2014 v

8 vi Data Entry Guidelines November 2014

9 1 Introduction The Australian Flood Studies Database (AFSD) was developed in , and was made available online by Geoscience Australia in The database provides metadata on Australian flood studies and information on flood risk, a digital version of the flood study is provided where available. The database was designed to capture Australian flood studies and summaries. It notes the techniques that were used, the data that has been used and the data s custodian (Middelmann et al ). The database aims to enable consultants and others tendering and undertaking work for local government to discover quickly existing flood studies relating to an area. Organisations wishing to commission flood studies (particularly small councils with less experience with flooding or risk analysis) may also find exploring the database useful in order to gain experience from work undertaken in other regions (Middelmann et al ). 1 Middelmann, M., Sheehan, D., Jordon, P., Zoppou, C., & Druery, C. (2005) National Catalogue of Flood Studies. NSW Floodplain Management Conference, February 2005, Narooma. Data Entry Guidelines November

10 2 Purpose This document is intended to familiarise new users with the fields in the AFSD Data Entry Application as well as provide guidance on completing data entry to a level acceptable for inclusion in the Australian Flood Risk Information Portal (AFRIP). This guide is designed to be used by people with a range of experience, from those with very limited experience with flood study reports through to highly experienced flood modellers. The guidance provided sets out the minimum level of information required for each field, and also seeks to clarify some issues that may arise during the data entry process. Any feedback on this document may be ed to hazards@ga.gov.au with AFRIP Data Entry Guidelines November 2014 in the subject line. 2 Data Entry Guidelines November 2014

11 3 Intellectual Property Permissions Some documents available from the database include additional copyright or disclaimer statements. These should be carefully read as some may require you to obtain permission before entering the document into the database. Flood studies with such statements should be cleared for inclusion in the database by discussing them with your direct supervisor, the person/agency who gave you the report, the commissioning organisation and/or the authors (e.g. consultancy) who produced the report. Please consult with your organisation s intellectual property policy if you have any doubt. Data Entry Guidelines November

12 4 General Processes 4.1 Obtaining a log in and changing your Account Details Log in details can be provided on request to appropriate individuals. The initial request should be by to hazards@ga.gov.au and include the following details: Name Job Title Place of Employment State Address Telephone Contact Number A confirmation will be sent when your account has been set up. Your log in and account details can be changed via the home page by clicking your username and selecting User Profile as shown below after you have logged in: Figure 1 Changing User Details. 4 Data Entry Guidelines November 2014

13 4.2 Should a study be entered? For a study to be included in the AFSD, it must first satisfy a number of criteria and/or undergo a number of checks. These suitability checks are designed to ensure a consistent level of detail and content in the AFSD. The criteria include: 1. The study must not already be in database. The database can be searched at the Australian Flood Studies Database Search ( 2. The study must be a Flood Study, that is, it must include some modelling (usually software based) of flooding undertaken to a professional standard. Relevant modelling would usually include hydrological estimates and/or hydraulic modelling. 3. Other related studies, such as floodplain management studies or plans, should be added as attachments to the Flood Study, and all relevant information should be included under the flood study entry. For example, damage assessments based on the modelling of a flood study should always be entered into the database, preferably attached to the flood study from which they are derived. 4. Reports where the primary focus is not to document the techniques and results of a flood study (for example levee coanstruction, town plans, discussion papers and council meetings) should not be included in the database as a new flood study entry. These studies may become extra attachments to relevant flood studies if they add important content to the entry. For example, any completed or planned action resulting from the study could be included as an attachment to the original study. 5. Documents that are in a preliminary draft state (e.g. hand written comments or an incomplete document) should generally not be included in the database. Contacting the person who provided the report to obtain the final report is encouraged. If the draft is complete and currently in use by the commissioning organisation, then it should be entered into the database. Studies that have not considered these suitability checks may not pass quality assurance procedures if submitted. Data Entry Guidelines November

14 5 Overall Data Capture and Quality Review Process Flood study data suitable for capture in the database includes general information about the study, flood study analyses, page references to survey information, mapping (possibly georeferenced from pdf images), flood mitigation strategies and digital copies of relevant documents (scanned if necessary). New reports are submitted using the review page which includes all of the information entered. Once a study has been submitted, the metadata entered undergoes a quality assurance process at Geoscience Australia. During this process a submitted study may be returned to the submitter with a request for changes or additional information. Additional information that has been clearly missed during data entry or missing appendices and other attachments may be sought. After the requests have been addressed the user can re-submit the study. Further detail on the attributes captured in the database are covered in the following pages. The process of data entry into the Australian Flood Studies Database is summarised in Figure 2. 6 Data Entry Guidelines November 2014

15 Figure 2 Flowchart of Australian Flood Studies Database data entry process. Data Entry Guidelines November

16 5.1 Home Page Figure 3 Homepage screenshot The Homepage that is displayed after logging on is displayed above. Current Work shows entries that are currently in a saved state, that is you have created them but not yet submitted them and entries that have been Returned with instructions to make changes before re-submitting. My Submitted shows a list of your studies that you have submitted and allows you to make more changes to them (they will then have to be re-submitted) or track their progress through the QA process until they are published on the Australian Flood Risk Information Portal. 8 Data Entry Guidelines November 2014

17 5.2 General Row Figure 4 Screenshot of the General Row expanded. The general row captures all mandatory information required for entry into the database as well as a comments field and other information. This information can usually be sourced from the introductory parts of a flood study such as the Executive Summary, Introduction and Title pages. Where there are multiple documents attached to the one entry (e.g. Flood Study, Floodplain Risk Management Study), the mandatory fields should be filled out using information from the Flood Study. Data Entry Guidelines November

18 Table 1 General Row field descriptions and guidance. Field Name Definition Field Rules Field Entry Guidance AFSID The Australian Flood Studies Identifier (AFSID) for the Flood Study. The AFSID is a unique identifier automatically assigned by Geoscience Australia to unambiguously identify a Flood Study entry. Typically a Flood Study and related Floodplain Management Studies and Plans are assigned the same AFSID. Computer generated number which identifies the Flood Study uniquely. May be useful when discussing flood studies, especially where title names are similar. Study name The name of the flood study. Use a capital letter for each word in the title Exceptions: and, in, of, to, a, on etc Do not include full stops. This should accurately reflect the title given to the report on the title page but should not include information on the version of the report (final draft, draft, final etc ). If the report is a draft this should be noted in the comments section of the general tab. Commissioning organisation The original organisation that commissioned the study. Do not include trailing Pty Ltd or other similar abbreviations. Use a capital letter for each word in the title Exceptions: and, in, of, to, a, on etc Do not include full stops. Current character limit of 300. Usually a council, but can sometimes be both a Council and another consultant. Do not include full stops. Lead consultant / organisation The organisation completing the majority of the work and authoring the flood study. Use a capital letter for each word in the title Exceptions: and, in, of, to, a, on etc Do not include full stops. Current character limit of 300. Where multiple organisations are involved in the creation of a study, a close reading of the introduction text can help you decide which organisation was ultimately responsible for the report. Do not include full stops. Date report commissioned The date the report was commissioned. A mandatory four digit year and an optional two digit month. This date is sometimes found in the first few sentences of Executive Summaries or other places detailing the history of the study itself. Date report completed The date the report was completed. A mandatory four digit year and an optional two digit month. Most accurate date is usually found in a version history part of the study on the first few pages. Watercourses in Study Names of rivers or creeks included in the study. e.g. Murrumbidgee River; Queanbeyan River. If more than one, values are delimited by semicolons. This should be a complete list of all the watercourses included in the modelling of the study. These could include creeks, rivers, drains etc. This information can usually be found summarised in the introductory sections of the report with more detail in the modelling specific sections. State / Territory The Australian State or Territory on which the study focuses on. Select one or more from the authority list. More than one State or Territory can be entered for a study. For example studies along the Murray River may be relevant to more than one state. 10 Data Entry Guidelines November 2014

19 Field Name Definition Field Rules Field Entry Guidance Comments Surveys in Study - Floor Surveys in Study - Terrain Flood Frequency Analysis Latitude and longitude Abstract Lineage Statement Optional field for additional general information about the flood study. A check box and page reference to where more information regarding Floor Level Surveys may be found. A check box and page reference to where more information regarding Terrain Surveys may be found. A check box and page reference to where more information regarding Flood Frequency Analysis may be found. The latitude and longitude of the Flood Study extent centroid. Additional information about the content of the study for example a brief summary of the contents and goals of the study. A statement of the history of the data, who created it and when, when if ever was it updated and by whom etc Free text. Current character limit of Proper sentences or else a short note without a full stop. Free Text Free Text Free Text No more than 3 decimal places. Free text field with a character limit of 1000 Free text field with a character limit of 1000 Include information such as the version of the report if it is not the final. Anything else notable about the study that does not fit into the comments sections of the other tabs can be noted here. For example The attached report is missing some appendices and figures. Floor level surveys are usually produced to inform damage assessments and are most frequently found in the Floodplain Risk Management Studies and Plans as opposed to the flood studies themselves. Terrain surveys usually produce cross sections that are used in the flood modelling. Photogrammetry can be used in older surveys but most often the format is a combination of LiDAR (sometimes referred to as Airborne Laser Survey, ALS) data with cross-section field surveys. Flood studies often have sections detailing the methods and results of flood frequency analysis that are used to inform model scenario creation, searching the pdf for keywords such as Flood frequency should help find these sections. Represent the study area logically. For example if the study is focused on a single town (e.g. AFSID 2794) then the latitude and longitude should be those of the town. However if the study encompasses large areas (such as AFSID 2781) then the latitude and longitude should be an approximation of the centre of the study area. In cases where the study area is not clear and the study is wide ranging (e.g. AFSID 2875) then the latitude and longitude entered should reflect a logical main population centre in that area. Is auto filled with a general statement that is acceptable for meeting the minimum metadata standards. It is encouraged that it be changed to summarise the specific goals methods and outcomes used in the study. Is auto filled for convenience with text that will comply with the metadata standard if left untouched. It is encouraged that the field is filled out with lineage information specifically relating to the study. Summary information about the number of drafts written and the drafting process for example would be valuable. Data Entry Guidelines November

20 Field Name Definition Field Rules Field Entry Guidance Organisation The custodian organisation for the final Flood Study to be contacted when any clarification or further information is desired. Usually the commissioning organisation. Do not include trailing Pty Ltd or other similar abbreviations. Use a capital letter for each word in the title Exceptions: and, in, of, to, a, on etc Do not include full stops. Current character limit of 1000 This will usually be a commissioning organisation, state government agency or, in rare cases, a federal government agency or the flood study authors themselves. Address The address of the flood study custodian organisation. Follow the format: Street Number Street Name, Suburb, State, Postcode. For example: 16 Flood Street, Deluge, NSW, 7777 In the case where the address of the most appropriate point of contact is not readily obtainable, the address of a state government department with environmental or hazard responsibilities may suffice. Individual Name Name of an individual to be contacted with queries and request for clarification relating to the flood study content. Position Position within the custodian organisation to be contacted with queries and request for clarification relating to the flood study content. Must be filled out if Position is missing In the case when an individual cannot be identified as an appropriate point of contact, internet searches of the custodian organisation may help to find at least an appropriate position to be entered into the Position field. Must be filled out if individual name is missing Internet searches of the custodian organisation should provide a position to enter into this field. If nothing flood specific can be found, a general enquiry s position found on a Contact us section of the website may be sufficient with a matching in the field. of the custodian organisation Must be a valid address If not known by the data entry person, may be sourced through searches for flood related contacts on the custodian organisation s website. Phone Phone number of the custodian organisation Must be a valid phone number If not known by the data entry person, may be sourced through searches for flood related contacts on the custodian organisation s website. Fax Fax number of the custodian organisation Must be a valid fax number If not known by the data entry person, may be sourced through searches for flood related contacts on the custodian organisation s website. 12 Data Entry Guidelines November 2014

21 5.3 Resources Row Figure 5 Screenshot of the Resources Row Expanded. The Resources row enables you to upload files and link online data to the study record. Doing this is valuable because it helps users of the search applications - they see links straight to the study documents and maps. Here you must upload a digital copy of the document you are using to complete the data entry. If you only have a hard copy please upload a scanned version of it here. If the study being upload is larger than the 150 Mb limit please use software to create a multi volume zip and upload each piece separately (see AFSID 2814 for an example). Data Entry Guidelines November

22 Any set of clearly related documents should be uploaded. For example AFSID 2408 includes a report on flood prioritisation. Where such directly relevant reports exist there is no reason not to include them as well commented, titled and uploaded attachments. This information is requested because while minor reports and other strictly non-flood study documents are not valuable as entries in their own right, attached logically to a relevant flood study they have value. Attached files should be logically named, for example RA4.pdf could be replaced with Dry_Creek_Floodplain_Mapping.pdf. Uploading Resources: About Files 1. Select or drag in files 2. Set Resource Content Type to Study Document 3. Set Resource Type to File 4. Enter the Short Title (this will be a link in the search application, so please make it short but useful) 5. Enter the File Description 6. Enter any Terms and Conditions associated with the upload 7. Decide if users must be forced to acknowledge any Terms and Conditions. About Maps The system supports maps in the following formats: Shapefile (the open ESRI format, not the PGDB Personal GeoDataBase format) Raster (the open ESRI Grid format not the proprietary binary format) WMS (Web Map Service, an open source standard for transferring map images) WFS (Web Feature Service, an open source standard for transferring geospatial data). Shapefile maps are in a file format commonly used to import and export data from a GIS. They are usually made available as a zip file. If they are in a directory structure, you will need to zip each map to its own separate Shapefile. For more information on Shapefiles see here. WMS and WFS maps are usually published from a server or cloud-based GIS. Both return data in response to simple URL text requests. A WMS returns a map image. A WFS returns a set of points, lines and shapes that can be used to create a map. You will need to know the URL for the service. There may also be a separate URL for the legend. 14 Data Entry Guidelines November 2014

23 To load a map Shapefile: 1. Check if the map shows depths or just the extent of inundation 2. Set Resource Content Type to Inundation Extent Map or Inundation Depth Map 3. Set Resource Type to File 4. Enter the Short Title (this will be a link in the search application, so please make it short but useful) 5. Enter the File Description 6. Enter any Terms and Conditions associated with the upload 7. Decide if users must be forced to acknowledge any Terms and Conditions. To load a map WFS or WMS: 1. Check if the map shows depths or just the extent of inundation 2. Enter the URL for the service 3. Click the Select button and choose an Endpoint from the list of maps available at the URL 4. Set Resource Content Type to Inundation Extent Map or Inundation Depth Map 5. Set Resource Type to WMS or WFS 6. If uploading a WMS enter the WMS Layer Name (this is often just a number) 7. If uploading a WMS enter the WMS Legend URL 8. Enter the Short Title (this will be a link in the search application, so please make it short but useful) 9. Enter the File Description 10. Enter any Terms and Conditions associated with the upload 11. Decide if users must be forced to acknowledge any Terms and Conditions. Data Entry Guidelines November

24 Table 2 Resources Row fields and guidance Field Name Definition Field Rules Field Entry Guidance Select files button Used to choose the actual electronic file to be attached to the Flood Study record. Must be less than 150 MB. Name must not include any spaces, replace them with underscores. If the study comprises many files i.e. the report is split into chapters, figures and appendices for example (see AFSID 2874), then there should be a best effort to put all the pieces together and form one complete pdf (using adobe acrobat pro for example). If this is not possible files should all be zipped together in a logical way and uploaded. Resource URL The URL used to connect to the WFS or WMS service Resource content type Tag to identify the resource as a study document or particular map type. Resource type A tag for the resource being supplied. If WMS is selected the fields WMS Layer name and WMS Legend URL should also be filled out. WMS layer name WMS legend URL Short title An identifier to help the WMS service supply the correct map The URL that supplies the maps Legend Text string will be used as a link on the external search page. File description A description of the file content. Free text. Current character limit of Proper sentences else a short note without a full stop. Documents and data such as pdfs and shapefiles/rasters should be tagged as file. WFS or WMS can also be tagged here as appropriate. This is often just a number. Short titles are useful here such as Wallumbilla Flood Study instead of Wallamballa Flood Study for the investigation of drainage problems for example. In the absence of any other descriptions use of the following template is recommended: Where a version (Draft, Final) is clear from the report: Flood Study Title Version Date (Month Year) For example: Emu Creek Flood Study Final Report February Where the version is not clear, omit the version from the description. Terms and Conditions Force Acknowledgement of Terms and Conditions before allowing download. A field to house any Terms and Conditions relating to the viewing and/or use of the resource being uploaded. A check box to be flagged if users of the resource are required to acknowledge Terms and Conditions of the resource before downloading it. If there is any restrictions on the use of the resource it should be entered here and will be available for users to read. This gives the data supplier an additional mechanism to ensure the data they are supplying has its related terms and conditions well and forcefully presented to users before downloading. 16 Data Entry Guidelines November 2014

25 5.4 Events Row Figure 6 Screenshot of the Events Row. The events row can capture information about three types of analysis and two mapping types often present in flood study reports; namely: Hydrological Estimates, Hydraulic Modelling, Damage Estimates and Inundation & Hazard Mapping. The events row can be the most time consuming to fill out and requires the closest reading of the study material to obtain the relevant information. This information can be found in section titled Modelling Methodology, Hydrological Modelling, and Hydraulic Modelling. This information may be summarised in the Introduction and the Executive Summary but usually you will need to read the text in the relevant section of the report to obtain the details needed to fill out the fields on this section. A check of the studies Table of Contents can help you quickly locate these sections. Data can be entered for hydrological estimates, hydraulic modelling and damage assessment analyses as well as for any mapping associated with the event. Each piece of information that can be associated with an event is described in the following. Data Entry Guidelines November

26 5.4.1 Event Box Figure 7 Screenshot shows the Event box. The Event Box is the base of each Event Row and records the basic information that relates to the event being simulated in the study; such as the nature of the event, its likelihood and comments. All of the modelling undertaken as part of the study and maps produced from the modelling is recorded in the rest of the Event Row. The information required here can often be first identified from lists of figures (for example sets of figures for 10, 25, 50 and 100 ARI scenarios) and found in detail somewhere at the beginning of Modelling Methodology or similar sections that summarise the suite of modelling undertaken in the study. 18 Data Entry Guidelines November 2014

27 Table 3 Events Row - Event Box fields and guidance Field Name Definition Field Rules Field Entry Guidance Average recurrence interval (ARI) Climate change Event date A statistical estimate of the average period in years between the occurrence of a flood of a given size or larger than the selected event. For example, floods with a discharge as great as, or greater than the 20 year ARI flood event will occur on average once every 20 years. Checked if the event modelled included climate change assumptions. The year and month of the historical event. If the term Other is selected a value is required. If the ARI/AEP has incorporated climate change, the scenario should be noted here e.g. Applied 1m sea level rise. ARI comments Free text entered by the user about the ARI. Free text. Current character limit of Useful comments here include distinguishing features of the modelled scenario, for example if it was specific to a set of mitigation options. Used for calibration Used for validation To be checked in the case of historical scenarios used to calibrate the software model. To be checked in the case of historical scenarios used to validate the software model. Usually mentioned in sections introducing the modelling method if not in a section titled Calibration. Usually mentioned in sections introducing the modelling method if not in a section titled Validation. Data Entry Guidelines November

28 5.5 Inundation and Hazard Mapping Boxes Figure 8 Screenshot of the Inundation and Hazard Boxes. The two Mapping Boxes record information about two types of maps often present in flood studies and floodplain risk management documents: Flood Inundation Maps and Flood Hazard Maps. These maps can be found throughout flood study documents, and can sometimes form large appendices. Sometimes a study may be missing the relevant appendices, figures may form a separate document that you do not have, or the figures may just be missing from the report. In these cases the List of Figures typically following the reports Table of Contents or careful skimming of the document can help ascertain how many figures the report produced. These figures should be entered into the appropriate Event Rows and comment made that at the time of data entry the figures were not available and may not necessarily be in the provided resources. 20 Data Entry Guidelines November 2014

29 5.5.1 Flood Inundation Mapping Figure 9 Screenshot of the Flood Inundation Mapping Box. Flood inundation maps display the extent or depth of flooding for specific modelled scenarios and can be presented in different ways. They are usually easy to find during a skim of the report or reading a List of Figures. If the document you are using for data entry clearly refers to figures but those figures are missing from your digital copy then contact your source for the document and request the figures. You should still record those maps in the Mapping Tab fields. Table 4 Events Row - Flood Inundation Mapping Box fields and guidance Field Name Definition Field Rules Field Entry Guidance Comments Additional information about the flood inundation mapping. Free text. Current character limit of Proper sentences else a short note without a full stop. Use this field to describe constraints or issues relating to the maps raised in the report such as Maps to be updated when the ~ levee is completed. - Maps missing from study. A comment stating; at the time of data entry the figures were not available and may not necessarily be attached to the study. Main purpose(s) Standardised classifications of the main purpose for which the flood inundation map was developed. If the term Other is selected an entry is required. The purpose of the mapping is often the same as the purpose of the study as a whole and this information can be obtained from the Introductory sections of most flood studies. When in doubt Flood Risk analysis and Determine Flood Behaviour are general enough to fit most situations. Select Primary Mapping Resource Used to choose a primary mapping resource. This is where an event is linked to any uploaded map that the simulation of that event produced. Linking events with uploaded shapefiles here will enable them to be viewed in the Portal. Data Entry Guidelines November

30 5.5.2 Flood Hazard Mapping Figure 10 Screenshot of the Mapping Tab - Flood Hazard Mapping. Flood hazard maps generally delineate several hazard levels (for example low, medium and high hazard) which are defined through a combination of parameters, such as water depth and velocity. If present they are usually easy to locate through a List of Figures or a skim of the document. If the document you are using for data entry clearly refers to figures but those figures are missing from your digital copy, then contact the source of the document and request the figures. Table 5 Events Row - Flood Hazard Mapping Box fields and guidance Field Name Definition Field Rules Field Entry Guidance Comments Additional information about the Flood Hazard Mapping. Free text. Current character limit of Proper sentences else a short note without a full stop. Hazard guideline Standardised classifications which define what combinations of parameters (for example, water depth and velocity) describe the different hazard zones (for example, low, medium and high hazard). If the term Other is selected an entry is required. Not often given in reports although if the guidelines used were the 1986 NSW Floodplain Development Manual this is usually stated in the text introducing the maps. Other hazard guidelines Non-standard Hazard Guideline. Must be filled in if Other is chosen in the above field. 22 Data Entry Guidelines November 2014

31 5.5.3 Hydraulic Modelling and Hydrological Estimate Boxes Figure 11 Screenshot of the Hydraulic Modelling and Hydrological Estimate Boxes. The Hydraulic Modelling section is intended to capture information about the software used to model the various scenarios hydraulically. Hydraulic models simulate water flow, evaluating flow parameters such as water level, extent and velocity. The Hydrological Estimates section is intended to capture information on the methods, software and scenarios used in the study. This may involve the evaluation of peak flows, flow volumes and the derivation of hydrographs for a range of floods. Table 6 Events Row - Hydraulic Modelling Box fields and guidance Field Name Definition Field Rules Field Entry Guidance Models(s)/Method(s) used The method (methodology or approach) used to develop the hydraulic model. If the term Other is selected a value is required. This information is usually readily available in a flood study, be careful, when there is talk of multiple models in the one document, to identify the model that actually produced the studies main results and scenario simulations. Comments Optional additional information about the hydraulic modelling. Free text. Current character limit of Proper sentences else a short note without a full stop. To be used sparingly. Items noted here tend to include specific details found in the modelling sections that you deem important enough to be recorded e.g. The authors of the report have doubts about the modelling presented due to low quality input elevation data. Data Entry Guidelines November

32 5.5.4 Damage Assessment Box Figure 12 Screenshot of the Damage Assessment Box The Damage Assessment relates to the damage caused by the flooding. Usually there is a relatively detailed section in the study devoted to the calculation of these values. These can usually be found after the discussion of the modelling. Sometimes a separate report or volume specifically dealing with damage costs will include this analysis. This information is often presented in tabular form. The List of Tables following the Table of Contents may help to locate the section relating to this data. 24 Data Entry Guidelines November 2014

33 Table 7 Events Row - Damage Assessment Box fields and guidance Field Name Definition Field Rules Field Entry Guidance Comments Additional information about the damage assessment analysis. Free text. Current character limit of Proper sentences else a short note without a full stop. Note the year of the estimate i.e. $140,000 (2006 dollars). Items read in the report that relate directly to the accuracy of the assessment may be reported here e.g. The damage in the area west of the river would be less in practice because of the change in building codes that were not included in this modelling. Method(s) The method (methodology or approach) used to develop the damage assessment. Damage Type(s) The type of damage considered in the assessment. Typically inundation depth only but if a study has modelled velocity or other parameters the study should be checked in detail to ascertain if this data was used in the calculation of damage. Building Type(s) The broad classification of the dominant type of building inundated for the modelled event. Building Material Type(s) The broad classification of the dominant construction materials for buildings estimated as damaged in the modelled or actual event. Average Annual Damage ($) Depending on its size (or severity), each flood will cause a different amount of flood damage to a flood prone area. Average annual damage (AAD) is the average damage per year that would occur in a nominated development situation from flooding over a very long period of time. If the damage associated with various annual events is plotted against their probability of occurrence, the AAD is equal to the area under the consequence-probability curve. AAD provides a basis for comparing the economic effectiveness of different management measures, (i.e. their ability to reduce the AAD). Recorded in Australian dollars. Can usually be inferred from the text around the calculations of Estimated Damage or in tables found in those sections of the report. Do not fill this field out unless the details of building materials were specifically taken into account in the report during damage calculations. Remember to note the year of the estimate i.e. $140,000 (2006 dollars) in the Comments section. Year of Valuation A year representing when the Dollar figures were current. A 4 digit year Sometimes this is stated explicitly (especially in large studies spanning many years) in the flood study itself, otherwise an appropriate value could be the year the study was released. Buildings with Water The number of buildings that have water on the property for the scenario modelled. Data Entry Guidelines November

34 Field Name Definition Field Rules Field Entry Guidance Buildings Inundated The number of buildings with water over the floor for the scenario modelled. Event Estimated cost ($) Estimate of the total cost of damages for the scenario modelled. 5.6 Mitigation Row Figure 13 Screenshot of the Mitigation Tab. The Mitigation Tab records information about mitigation strategies that have been recommended by, or undertaken in direct response to, the flood study. Flood studies may include comparisons of various mitigation options that end in solid recommendations. However, sometimes that analysis is dealt with in a separate report. When available that document should be attached to the flood study entry and used to fill in the recommended strategies. For example, studies following the NSW State Government s flood policy have this information separated from the Flood Study into a Floodplain Risk Management Study (see ASFID 2842 as an example). Only strategies that are unambiguously recommended in the document should be selected here. Sometimes it can be difficult to find strong recommendations in amongst the many options for mitigation being considered. In the absence of a section titled Recommendations, look in the summary sections related to the mitigation options for sentences similar to Of all the strategies discussed here the following are cost effective and should be implemented. Be careful of options that are found to be highly effective but too expensive to be recommended as these should not be selected under this tab e.g. The construction of the ~ levee was found to almost completely mitigate the worst areas of the flooding and would be built in an area of unoccupied land, however due to the high cost and the presence of other cheaper mitigation options it is not suggested. As with other sections, if Other is selected, the item must be specified. 26 Data Entry Guidelines November 2014

35 5.7 Review Page Figure 14 Screenshot of Review Page. The Review Page provides an overview of all data entered as a final check before submission for quality assurance. Use this summary to check for spelling mistakes and to ensure that all the information entered is correct and complete. Double check that you have attached the digital copy of the flood study, (and any other relevant reports and figures). Also check that you can download and open attachments from the submissions page. When you are satisfied that the study is complete and accurate, click the Submit button. Data Entry Guidelines November

36 Glossary Adapted From *Glossary entries are sourced from 1 unless otherwise numbered. 1. Australian Emergency Management Handbook Series Managing the floodplain: a guide to best practice in flood risk management in Australia, Australian Emergency Management Institute, Australian Government Attorney-General s Department, 2013 Second edition ISBN , pp Armidale Dumaresq Council and Paterson Consulting (2005) Armidale Flood Study, Report for The Armidale Dumaresq Council, pp. i-vii. 3. Sinclair Knight Merz (2009) Shire of Boddington Floodplain Management Study. Flood Modelling Report, Report for The Shire of Boddington, pp. iii-iv. 4. Rowe, WD. (1990) Perspective on Rare Events for Decision Making, In: Proceedings of a Conference on Risk Based Decision Making in Water Resources, Santa Barbara, California, October 1989, American Society of Civil Engineers, (ASCE), pp World Meteorological Organization (2009) Manual for Estimation of Probable Maximum Precipitation, 3rd edition, WMO - No. 1045, Geneva, ISBN SCARM (2000) Floodplain management in Australia: Best practice principles and guidelines, Agriculture and Resource Management Council of Australia and New Zealand, Standing Committee on Agriculture and Resource Management, Report No. 73, CSIRO Publishing, Collingwood, Victoria, ISBN , pp Aerial Photogrammetry Aerial photogrammetry uses aerial photographs to produce topographic maps of the earth's surface and of features of the built environment. 2 Annual exceedance probability (AEP) The likelihood of the occurrence of a flood of a given or larger size occurring in any one year, usually expressed as a percentage. For example, if a peak flood flow of 500 m 3 /s has an AEP of 5%, it means that there is a 5% chance (that is, a one-in-20 chance) of a flow of 500 m 3 /s or larger occurring in any one year (see also average recurrence interval, flood risk, likelihood of occurrence, probability). Astronomical tide The variation in sea level caused by the gravitational effects of (principally) the moon and sun. It includes highest and lowest astronomical tides (HAT and LAT) occur when relative alignment and distance of the sun and moon from the earth are optimal. Water levels approach to within 20 cm of HAT and LAT twice per year around mid-summer and mid-winter king tides. 28 Data Entry Guidelines November 2014

37 Australian height datum (AHD) A common national survey height datum as a reference level for defining reduced levels; 0.0 m AHD corresponds approximately to sea level. Average annual damage (AAD) Depending on its size (or severity), each flood will cause a different amount of flood damage to a flood-prone area. AAD is the average damage per year that would occur in a nominated development situation from flooding over a very long period of time. If the damage associated with various annual events is plotted against their probability of occurrence, the AAD is equal to the area under the consequence probability curve. AAD provides a basis for comparing the economic effectiveness of different management measures (i.e. their ability to reduce the AAD). Average recurrence interval (ARI) A statistical estimate of the average number of years between the occurrence of a flood of a given size or larger than the selected event. For example, floods with a flow as great as or greater than the 20- year ARI (5% AEP) flood event will occur, on average, once every 20 years. ARI is another way of expressing the likelihood of occurrence of a flood event (see also annual exceedance probability). Bathymetry The configuration of the bed of a water body, as measured by depth contours. 6 Cadastre Legal lot boundaries. 2 Catchment The area of land draining to a particular site. It is related to a specific location, and includes the catchment of the main waterway as well as any tributary streams. Catchment flooding Flooding due to prolonged or intense rainfall (e.g. severe thunderstorms, monsoonal rains in the tropics, tropical cyclones). Types of catchment flooding include riverine, local overland and groundwater flooding. Chance The likelihood of something happening that will have beneficial consequences (e.g. the chance of a win in a lottery). Chance is often thought of as the upside of a gamble (Rowe ) (see also risk). Critical Storm Duration The duration of the storm event of nominated severity (e.g. the 2% AEP flood) that produces the largest flood discharge at the location of interest. Critical storm duration depends upon catchment size, topography and land use and on the temporal pattern of rainfall. 6 Coastal flooding Flooding due to tidal or storm-driven coastal events, including storm surges in lower coastal waterways. This can be exacerbated by wind-wave generation from storm events. Data Entry Guidelines November

38 Consent authority The authority or agency with the legislative power to determine the outcome of development and building applications. Consequence The outcome of an event or situation affecting objectives, expressed qualitatively or quantitatively. Consequences can be adverse (e.g. death or injury to people, damage to property and disruption of the community) or beneficial. Defined flood event (DFE) The flood event selected for the management of flood hazard to new development. This is generally determined in floodplain management studies and incorporated in floodplain management plans. Selection of DFEs should be based on an understanding of flood behaviour, and the associated likelihood and consequences of flooding. It should also take into account the social, economic, environmental and cultural consequences associated with floods of different severities. Different DFEs may be chosen for the basis for reducing flood risk to different types of development. DFEs do not define the extent of the floodplain, which is defined by the PMF (see also design flood, floodplain and probable maximum flood). Design flood The flood event selected for the treatment of existing risk through the implementation of structural mitigation works such as levees. It is the flood event for which the impacts on the community are designed to be limited by the mitigation work. For example, a levee may be designed to exclude a 2% AEP flood, which means that floods rarer than this may breech the structure and impact upon the protected area. In this case, the 2% AEP flood would not equate to the crest level of the levee, because this generally has a freeboard allowance, but it may be the level of the spillway to allow for controlled levee overtopping (see also annual exceedance probability, defined flood event, floodplain, freeboard and probable maximum flood). Development Development may be defined in jurisdictional legislation or regulation. This may include erecting a building or carrying out of work, including the placement of fill; the use of land, or a building or work; or the subdivision of land. Infill development refers to the development of vacant blocks of land within an existing subdivision that are generally surrounded by developed properties and is permissible under the current zoning of the land. Conditions such as minimum floor levels may be imposed on infill development. New development is intensification of use with development of a completely different nature to that associated with the former land use or zoning (e.g. the urban subdivision of an area previously used for rural purposes). New developments generally involve rezoning, and associated consents and approvals. It may require major extensions of existing urban services, such as roads, water supply, sewerage and electric power. Redevelopment refers to rebuilding in an existing developed area. For example, as urban areas age, it may become necessary to demolish and reconstruct buildings on a relatively large scale. Redevelopment generally does not require either rezoning or major extensions to urban services. 30 Data Entry Guidelines November 2014