{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author": "Sutherland Shire Council", "author_email": null, "contact_point": "ssc@ssc.nsw.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "84a3f359-723b-4262-b071-07f19e08960d", "isopen": false, "license_id": "cc-by", "license_title": "Creative Commons Attribution 3.0 Australia", "license_url": "http://creativecommons.org/licenses/by/3.0/au/", "maintainer": null, "maintainer_email": null, "metadata_created": "2026-01-21T18:42:20.202368", "metadata_modified": "2026-01-21T18:42:26.786517", "name": "nsw-fdp-kurnell-flood-study-report-and-figures", "notes": "Objectives\n\nSutherland Shire Council engaged Webb, McKeown & Associates to prepare the Kurnell\nTownship Flood Study, utilising current technology and data. The information and results\nobtained from the study will be used in the preparation of the Floodplain Risk Management\nStudy and Plan. The specific objectives of the Kurnell Township Flood Study are to:\n\n- Develop suitable hydrologic and hydraulic models to define flood behaviour, and that can\nbe used in the subsequent Floodplain Risk Management Study and Plan.
\n- Use these models to quantify flood levels, velocities, flows and flood extents for the 20%,\n5% and 1% Annual Exceedence Probability (AEP) design storm events and the Probable\nMaximum Flood (PMF). The impact of both surface runoff and tidal inundation will be\nconsidered.
\n- Assess the provisional hydraulic categories and undertake provisional flood hazard\nmapping in accordance with the NSW Floodplain Development Manual 2005 (Reference\n2).
\n
\n\nOutline\n\nThis report details the methodology, results and findings of the Kurnell Township Flood Study,\nthe key elements of which include:\n\n- a background to the study area (Chapter 2),
\n- a summary of available flood related data (Chapter 3),
\n- the development and validation of the hydrologic and hydraulic models (Chapters 4 to 7),
\n- the definition of the design flood behaviour for existing conditions through the analysis\nand interpretation of model results (Chapters 8 and 9), and
\n- a sensitivity analysis of key model parameters and an analysis of the potential impacts of\nclimate change (Chapters 10 and 11).
\n
\n\nA glossary of flood related terms is provided in Appendix A.\n\nCONCLUSIONS\n\nDetailed numerical models to quantify the hydrology and hydraulics of the Kurnell catchment\nhave been established, making best use of the data currently available. These models have\nbeen used to define the design flood behaviour for existing conditions.\n\nResults indicate that flooding in Kurnell is currently dominated by relatively shallow, slow moving\nwater throughout the majority of the study area. However, the extent of flooding, the ponding\ntimes, and the lack of clear evacuation routes have the potential to increase the flood risk. Whilst\nrainfall is currently the primary cause of flooding for most areas within Kurnell, the impacts of\nclimate change has the potential to increase the dominance of tidal flooding. Hence future\nmanagement strategies should consider the effects of both rainfall and tidal flooding.\n\nThe current models are significantly more detailed and refined compared with any previous\nstudies or investigations. Given the level of detail used in the present study and the ability of the\ncurrent models to better represent dynamic flow and the complex overland flow paths through\nmuch of the floodplain, means that the results can be interpreted with a greater level of\nconfidence compared with any previous estimates of flood behaviour.\n\nImportantly, the models developed for the current study are suitable for use in a subsequent\nFloodplain Risk Management Study and/or other assessments of redevelopment options within\nthe catchment. However, it should be noted that any specific site investigations should\nundertake more detailed flood analyses to gain sufficient information specific to the area. The\ncurrent results are intended for use at a catchment scale rather than an individual site basis.", "num_resources": 5, "num_tags": 3, "organization": {"id": "ebf20552-83e1-4d93-8122-352f52bc847e", "name": "sutherland-shire-council-datansw", "title": "Sutherland Shire Council", "type": "organization", "description": "Sutherland Shire is located at the southern coastal border of the Sydney metropolitan area, about 26 kilometres from the Sydney CBD, is 369km2 in area and home to over 227,300 people.\r\n\r\nWeb: http://www.sutherlandshire.nsw.gov.au\r\n\r\nFloodplain Management has been considered for:\r\n\r\n* Bundeena\r\n* Deadmans Creek\r\n* Dents Creek\r\n* Ewey Creek\r\n* Georges River\r\n* Gwawley Bay Catchment\r\n* Kurnell Township\r\n* Oyster Creek\r\n* Woolooware Bay Catchment\r\n* Woronora River\r\n\r\nhttp://www.sutherlandshire.nsw.gov.au/Outdoors/Environment/Flooding", "image_url": "", "created": "2025-06-24T06:16:28.653090", "is_organization": true, "approval_status": 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