{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author": "Willoughby City Council", "author_email": null, "contact_point": "email@willoughby.nsw.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "5bcaa510-9255-4d79-82a4-1aa548e6b630", "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": "2026-01-21T16:31:33.338318", "metadata_modified": "2026-01-21T16:31:39.675250", "name": "nsw-fdp-scotts-creek-flood-study-report", "notes": "This report presents the results of a detailed technical investigation of flooding in the Scotts\nCreek catchment and has been sponsored by Willoughby City Council (WCC) and Department of\nEnvironment and Climate Change. Figure 1.1 shows the location of the catchment which drains\nthe suburbs of Chatswood and Castle Cove before discharging to Sugarloaf Bay in Middle\nHarbour. The investigation defined flooding as far downstream as the Eastern Valley Way.\n\nMathematical models of the catchment and the floodplain were developed using detailed field\nsurveys and interpreted to present a comprehensive picture of flooding under present day\nconditions. The study objective was to define flood behaviour in the stream in terms of flows,\nlevels and flooding behaviour for floods ranging between 5 and 200 years average recurrence\ninterval (ARI), as well as the PMF.\n\nThe investigation involved hydrologic modelling to assess flows in Scotts Creek between its\nheadwaters in the Chatswood CBD area and the Eastern Valley Way. These flows were applied\nto a hydraulic model of the main arm of Scotts Creek to assess peak water levels and flow\npatterns. The hydraulic modelling extended from Havilah Street on the eastern side of Chatswood\nChase to the Eastern Valley Way.\n\nThe trunk drainage system of Scotts Creek to Penshurst Street is denoted Stormwater Catchment\n26 and is owned by Sydney Water. It comprises sections of piped drains, as well as covered and\nopen concrete lined stormwater channels. The piped drainage system extends through the\nChatswood CBD to the eastern side of Chatswood Chase in Havilah Street (Figure 1.2).\nBetween Havilah Street and Baldry Street, flows on the main arm of Scotts Creek are conveyed in\nSydney Water\u2019s covered stormwater channel which follows the route of the original creek and\nextends as far as the Temple Emanuel School near Chatswood Avenue. An open concrete lined\nstormwater channel also owned by Sydney Water continues downstream and conveys flows to\nPenshurst Street. Willoughby City Council\u2019s channel continues downstream of Penshurst Street\nto the Eastern Valley Way, and comprises sections of rock lined and \u201cpillow concrete\u201d lined\ntrapezoidal channel. The total catchment area at the Eastern Valley Way is 3 km2.\nThe headwaters of the catchment are drained by separate piped trunk drainage systems which\ndrain the northern and southern portions of the catchment. Overland flows from the southern\ntrunk drain are diverted into Chatswood Oval, which functions as an off-line detention basin\nduring periods of heavy rainfall.\n\nPeak flows from the northern portion of the catchment will be influenced by a flood storage/ water\nharvesting basin which will be excavated adjacent to Ferguson Lane as part of the Chatswood\nCivic Place project, due for construction in 2009 and situated just upstream of the intersection of\nthat street with Archer Street. The storage characteristics of both Chatswood Oval and the flood\nstorage basin in Ferguson Lane have been included in the hydrologic model of Scotts Creek\ndeveloped in this study for the estimation of design flows.\n\nThe trunk drainage systems meet at the intersection of Archer Street and Victoria Avenue and\ncontinue eastwards as separate piped systems along both the northern and southern sides of\nVictoria Avenue to Havilah Street. The drainage system is of limited hydraulic capacity and has\nbeen surcharged, most recently in April 1998, when flooding was experienced in several\ncommercial properties bordering Victoria Avenue.\n\nIt was reported that overland flows heading eastwards along Victoria Avenue in the April 1998\nflood were captured by the prevailing natural surface grade and flowed into the basement car\npark of Chatswood Chase via the driveway entrance near the intersection with Havilah Street.\n\nOverland flows heading eastwards down Mills Lane also entered Chatswood Chase. The car park\nthen acted as a detention basin and had a local influence on downstream flows in the creek. To\ninclude the effect of this informal detention basin on downstream flows, the car park storage was\nalso incorporated in the hydrologic model.\n\nFor the hydraulic modelling, which converted flows into flood levels and velocities, Willoughby\nCity Council decided to focus on the section of the creek downstream of Havilah Street, where\nthere is residential development bordering both sides of the creek and where flooding problems\nhave been experienced in the past.", "num_resources": 1, "num_tags": 2, "organization": {"id": "82958b61-ebe8-4657-b1b2-21f4248a99de", "name": "willoughby-city-council-datansw", "title": "Willoughby City Council", "type": "organization", "description": "The City of Willoughby on Sydney's  north shore is 8.5km from the CBD and covers an area of 23km/sq and includes the suburbs of Artarmon, Castlecrag, Castle Cove, Chatswood, Middle Cove, Naremburn, Northbridge and Willoughby, as well as parts of Gore Hill, Lane Cove, St Leonards and Roseville. Approximately 70 000 people live within the Willoughby City area.\r\n\r\nWeb: http://www.willoughby.nsw.gov.au\r\n\r\nThe drainage system in the Willoughby Council area is made up of a number of catchments on the eastern and western sides of the Pacific Highway, which forms the drainage divide. Catchments on the west side of the Pacific Highway include Blue Gum Creek and Swaines Creek. On the east side of the Pacific Highway catchments include Scotts Creek, Sugarloaf Creek, Sailors Bay Creek and Flat Rock Creek.\r\n\r\nFlood Studies have been completed for the following catchments:\r\n\r\n* Flat Rock Creek (Mainstream flooding only)\r\n* Sailors Bay Creek\r\n* Scott\u2019s Creek (Mainstream flooding only)\r\n* Sugarloaf Creek\r\n* Swaines Creek\r\n\r\nhttp://www.willoughby.nsw.gov.au/Environment---Sustainability/nature/water/Floodplain-Management/\r\n\r\n\r\n", "image_url": "", "created": "2025-06-24T19:25:37.076825", "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-scotts-creek-flood-study-report", "title": "DataNSW"}, "original_name": "nsw-fdp-scotts-creek-flood-study-report", "owner_org": "82958b61-ebe8-4657-b1b2-21f4248a99de", "private": false, "promotion_level": "0", "remote_last_updated": "2026-01-14 04:56:47.809481", "spatial": "{\"type\": \"Point\",\"coordinates\": [147.0179,-32.1618]}", "spatial_coverage": "New South Wales (NSW81093)", "state": "active", "temporal_coverage_from": "2025-12-17 01:09:46.280693", "temporal_coverage_to": "2008-03-01 00:00:00", "title": "Scotts Creek Flood Study", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "9dc31341-a030-4496-8eba-a9e6c6926b89"}, {"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": "2026-01-14T04:56:47.843467", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "format": "HTML", "hash": "", "id": "492b5e5d-6fb3-4f17-a4c3-bb0514a5788c", "last_modified": null, "metadata_modified": "2026-01-21T16:31:33.335245", "mimetype": null, "mimetype_inner": null, "name": "Scotts Creek Flood Study", "package_id": "5bcaa510-9255-4d79-82a4-1aa548e6b630", "position": 0, "resource_type": null, "size": null, "state": "active", "url": "https://flooddata.ses.nsw.gov.au/dataset/2fc4a5c2-833f-47e1-bbe5-165a40dc7e61/resource/11712bdc-fba5-449f-8fca-4295c48b3987", "url_type": null, "zip_extract": false}], "tags": [{"display_name": "Chatswood", "id": "69d5dd85-1aa5-40b7-b17f-c0f4f8fd175b", "name": "Chatswood", "state": "active", "vocabulary_id": null}, {"display_name": "Scotts Creek", "id": "182e5001-4278-445b-8ca4-c3dd6f0569ea", "name": "Scotts Creek", "state": "active", "vocabulary_id": null}], "groups": [], "relationships_as_subject": [], "relationships_as_object": []}}