{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author": "Fairfield City Council", "author_email": null, "contact_point": "mail@fairfieldcity.nsw.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "dc05ac13-9d1a-4494-9f37-5d84928b8bab", "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": "2026-01-21T23:28:20.010117", "metadata_modified": "2026-01-21T23:28:26.093701", "name": "nsw-fdp-old-guildford-overland-flood-study-2010-report", "notes": "Study Objectives\n\nKey objectives of this study are to:\n<ul>\n<li>Identify the major overland flow paths within the Old Guildford catchment study area.</li>\n<li>Determine the nature and extent of overland flooding and flood risk in the study area.</li>\n<li>Identify properties at risk of local overland flooding and quantify the risk of flooding to these\nproperties.</li>\n<li>Produce flood model results (flood level, velocity and flow) for the 20, 100, 200, 500, 2,000\nand 10,000 year ARI and PMF storm events</li>\n<li>Prepare flood extent (depth and velocity) maps and flood risk precinct maps for the study area\nfor the 100 year ARI and PMF events.</li>\n<li>Assess the sensitivity of flood behaviour to changes in hydrologic and hydraulic characteristics\nin the catchment.</li>\n</ul>\n\nOriginally, it was intended to also identify \u201cZones of Significant Flow\u201d to determine those sections\nof overland flow paths through properties which would need to be kept clear in order to reduce\nflood risk. Due to time constraints, these zones will be identified in the floodplain risk\nmanagement study and plan.\n\nConclusions\n\nThe Old Guildford Overland Flood Study has been successful in achieving its objectives, being:\n<ul>\n<li>Define flood behaviour and identify the major overland flow paths within the Old Guildford\ncatchment; and</li>\n<li>Identify properties at risk of local overland flooding and to prepare flood risk precinct maps.</li>\n</ul>\n\nThe study\u2019s modelling approach consisted of a XP-STORM model that dynamically linked the 2D\nfloodplain and 1D stormwater drainage network to assess flood behaviour and determine flood risk\nto properties. The model allows flows to be transferred in and out of the drainage network\ndepending on the hydraulic conditions. This approach is considered to be able to efficiently\nproduce a reliable representation of overland flood behaviour compared to those used by Council\npreviously.\n\nThe amount and quality of the data available to define physical features in the study area, including\nthe ground surface, open channels, pits and pipes and building footprints, was adequate for the\ndevelopment of the study models, though information on historical flood events in the study area\nwas lacking. Council should, if practical, collect flood marks in overland flood areas following\nflood events to permit a more thorough model calibration and validation process for future overland\nflood studies.\n\nSensitivity analysis indicates that the overland flood behaviour is typically not sensitive to variation\nin floodplain roughness or increased rainfall intensity. Hence, overland flood depth estimates are\nnot expected to be significantly impacted by uncertainties in these parameters.\nOverland flood depths are likely to increase if a high degree of pit blockage occurs during a flood\nevent. This should be taken into consideration during the development of overland flood risk\nmanagement strategies during the floodplain risk management study phase.\nThe flood extent and risk precinct mapping has been prepared to present only the areas which are\naffected by significant levels of overland flooding. This has been achieved by removing \u201cnuisance\u201d\nflood areas, typically of depths less than 150mm from the mapping. The merit of this approach is\nthat properties which are within or adjacent to these areas are not unduly coded with a flood risk.\n\nThe overland flood risk precinct delineation process itself has been developed over a number of\nyears in consultation with FCC. It clearly and objectively defines the level of flood affectation of\neach part of the study area. Consideration of the flood event ARI in determining the flood risk, in\naddition to the hydraulic hazard posed by flood events to life and property, is particularly\nappropriate for the urban setting of the study area. By definition it provides an indication of the\nprobability of a property being flood affected during a given time frame, in addition to the degree\nof hazard that it would experience.\n\nThe study has ultimately provided a good foundation from which to prepare the floodplain risk\nmanagement study and plan as the next step in the floodplain risk management process.", "num_resources": 1, "num_tags": 3, "organization": {"id": "d6ac6906-7852-4875-ba2b-7c0ec1f24ba3", "name": "fairfield-city-council-datansw", "title": "Fairfield City Council", "type": "organization", "description": "Fairfield City is 32km south-west of the Sydney Central Business District and covers an area of 104 square km, incorporating 27 suburbs. Located in Western Sydney, its neighbouring areas are Parramatta and Liverpool, as well as the councils of Cumberland, the new Canterbury Bankstown, Blacktown and Penrith.\r\n\r\nhttp://www.fairfieldcity.nsw.gov.au/\r\n\r\nThe impact of development in the past 50 years has resulted in severe degradation of the natural habitat and water quality in these creeks and wetlands that feed into the City's three catchments: \r\n\r\nThe Hawkesbury-Nepean Catchment to the west fed by the South Creek Sub-Catchment consisting of South Creek, Eastern Creek and Ropes Creek and the Georges River Catchment to the south and east fed by the sub-catchments of Prospect Creek and Cabramatta Creek. \r\n", "image_url": "", "created": "2025-06-24T04:51:54.501519", "is_organization": true, "approval_status": "approved", "state": "active"}, "original_harvest_source": {"site_url": "https://data.nsw.gov.au/data/", "href": "https://data.nsw.gov.au/data/dataset/nsw-fdp-old-guildford-overland-flood-study-2010-report", "title": "DataNSW"}, "original_name": "nsw-fdp-old-guildford-overland-flood-study-2010-report", "owner_org": "d6ac6906-7852-4875-ba2b-7c0ec1f24ba3", "private": false, "promotion_level": "0", "remote_last_updated": "2026-01-14 22:01:25.317027", "spatial": "{\"type\": \"Point\",\"coordinates\": [147.0179,-32.1618]}", "spatial_coverage": "New South Wales (NSW81093)", "state": "active", "temporal_coverage_from": "2025-12-17 00:29:49.015519", "temporal_coverage_to": "2010-08-04 00:00:00", "title": "Old Guildford Overland Flood Study", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "8901ec1f-6a13-4bc6-b0c4-4b1eed22b422"}, {"key": "harvest_source_id", "value": "9ebac586-8e51-4904-9f6c-d9b79726659a"}, {"key": "harvest_source_title", "value": "DataNSW"}], "resources": [{"cache_last_updated": null, "cache_url": null, "created": "2026-01-14T22:01:25.341626", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "format": "HTML", "hash": "", "id": "8a9eb26c-f4fe-4461-9888-90b4bea044a3", "last_modified": null, "metadata_modified": "2026-01-21T23:28:20.006442", "mimetype": null, "mimetype_inner": null, "name": "Old Guildford - Overland Flood Study 2010", "package_id": "dc05ac13-9d1a-4494-9f37-5d84928b8bab", "position": 0, "resource_type": null, "size": null, "state": "active", "url": "https://flooddata.ses.nsw.gov.au/dataset/3fea5c77-8483-4b30-99fd-e64eb49fb90d/resource/c1537251-2d14-42a3-9b9f-dc678dcc3f57", "url_type": null, "zip_extract": false}], "tags": [{"display_name": "Old Guildford", "id": "2f01cda4-ce58-447d-8d77-4274249aba22", "name": "Old Guildford", "state": "active", "vocabulary_id": null}, {"display_name": "hydraulic model", "id": "5ea1bf91-c991-4e1b-808e-2528b9741aa5", "name": "hydraulic model", "state": "active", "vocabulary_id": null}, {"display_name": "hydrologic model", "id": "306ddc3f-3866-4055-8fd7-0e4cd32a2a1a", "name": "hydrologic model", "state": "active", "vocabulary_id": null}], "groups": [], "relationships_as_subject": [], "relationships_as_object": []}}