{"help": "https://data.gov.au/data/en/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": "1da731ff-5b38-44bd-8821-14b0125e91e0", "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": "2026-01-21T13:06:18.757004", "metadata_modified": "2026-01-21T13:06:25.056339", "name": "nsw-fdp-sugarloaf-creek-flood-study-report", "notes": "The study objective was to define flood behaviour on Sugarloaf Creek in terms of water levels,\nflows and velocities for design floods ranging between 5 and 100 year ARI, as well as for the\nProbable Maximum Flood (PMF). Figure 1.1 shows the Sugarloaf Creek catchment and its\nstormwater system. The flood study investigation involved the following activities:\n? The collection of flood related data. A Community Newsletter/Questionnaire introducing\nthe study objectives and seeking information on historic flood patterns was forwarded to\nresidents in the floodplain. Rainfall data at several daily gauges were also collected. A\nprevious flood study of the Sugarloaf Creek catchment by Lyall and Macoun Consulting\nEngineers (LMCE, 1988) also provided information on historic flooding. Three significant\nstorms which had occurred over the past 25 years were identified (5 August 1986, 30\nApril 1988 and 10 April 1998) and their rainfalls used to test the flood models developed\nfor the study.\n\n? The hydrologic modelling of the catchment of Sugarloaf Creek to determine discharge\nhydrographs. All reaches of the piped drainage system of diameter 450 mm or larger were\nmodelled.\n\n? Application of the discharge hydrographs to a hydraulic model of the main arm of the\ncreek and its overland flow paths. The model extended from the headwaters of the\ncatchment (to the west of Bales Park) to its outfall to Sugarloaf Bay downstream of the\nEastern Valley Way.\n\n? Presentation of study results as water surface profiles, as well as diagrams showing\nindicative extents of inundation, provisional flood hazard and the hydraulic categorisation\nof the floodplain into floodway and flood fringe areas.\n\n? Sensitivity studies to assess the effects on model results resulting from uncertainties in\nmodel parameters such as hydraulic roughness of the floodplain, the effects of partial\nblockage of the piped drainage system and the effects on flooding patterns resulting from\nfuture climate change.\n\nThe hydrologic modelling approach was based on the DRAINS rainfall-runoff software. DRAINS\nderived discharge hydrographs resulting from historic storms for each model sub-catchment area,\nwhich were then applied to the hydraulic model to demonstrate that the models reproduced\nobserved flood behaviour. The TUFLOW two-dimensional modelling system was adopted for the\nhydraulic analysis. Appendix A describes the results of testing the models.\nBoth the DRAINS and TUFLOW models included the piped drainage system and routed the flows\nto the catchment outlet. Hence both models were able to provide independent estimates of the\nrelative magnitudes of piped and overland flows. However, TUFLOW being primarily a hydraulic\nmodel (as opposed to DRAINS which is hydrologically based) was used to route flows over the\nland surface and determine peak flood levels and flow velocities, as well as indicative extents and\ndepths of inundation.\n\nAfter testing the models for the historic floods, design storm rainfalls ranging between 5 and 100\nyear ARI were derived using procedures set out in Australian Rainfall and Runoff (ARR, 2001)\nand applied to the DRAINS model to determine discharge hydrographs. The PMF was also\nmodelled. Flooding patterns derived by TUFLOW for the design flood events are described in\nChapter 6 of the report, with exhibits presented in <strong>Volume 2</strong>.", "num_resources": 2, "num_tags": 5, "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-sugarloaf-creek-flood-study-report", "title": "DataNSW"}, "original_name": "nsw-fdp-sugarloaf-creek-flood-study-report", "owner_org": "82958b61-ebe8-4657-b1b2-21f4248a99de", "private": false, "promotion_level": "0", "remote_last_updated": "2026-01-14 04:57:22.203506", "spatial": "{\"type\": \"Point\",\"coordinates\": [147.0179,-32.1618]}", "spatial_coverage": "New South Wales (NSW81093)", "state": "active", "temporal_coverage_from": "2025-12-17 02:22:58.885676", "temporal_coverage_to": "2010-08-01 00:00:00", "title": "Sugarloaf Creek Flood Study", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "a3b4f380-0ee6-408e-aeee-d16c614062ea"}, {"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": "2026-01-14T04:57:22.230588", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "format": "HTML", "hash": "", "id": "62d29361-3fd9-445a-8428-19873fa172db", "last_modified": null, "metadata_modified": "2026-01-21T13:06:18.750196", "mimetype": null, "mimetype_inner": null, "name": "Sugarloaf Creek Flood Study", "package_id": "1da731ff-5b38-44bd-8821-14b0125e91e0", "position": 0, "resource_type": null, "size": null, "state": "active", "url": "https://flooddata.ses.nsw.gov.au/dataset/074de504-9e79-4e17-8688-640940ca40f6/resource/2fb0c312-d2d4-460a-b749-ac23e4e7c1c4", "url_type": null, "zip_extract": false}, {"cache_last_updated": null, "cache_url": null, "created": "2026-01-14T04:57:22.230593", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "format": "HTML", "hash": "", "id": "c633177b-a4f1-440f-acdb-739fb47422b7", "last_modified": null, "metadata_modified": "2026-01-21T13:06:18.751034", "mimetype": null, "mimetype_inner": null, "name": "Sugarloaf Creek Flood Study", "package_id": "1da731ff-5b38-44bd-8821-14b0125e91e0", "position": 1, "resource_type": null, "size": null, "state": "active", "url": "https://flooddata.ses.nsw.gov.au/dataset/074de504-9e79-4e17-8688-640940ca40f6/resource/05ff2e17-a7c1-44f6-bbe2-cfb1a3fa723c", "url_type": null, "zip_extract": false}], "tags": [{"display_name": "Castlecrag", "id": "c9a0b9fc-23da-4fda-afc6-88faafcad60c", "name": "Castlecrag", "state": "active", "vocabulary_id": null}, {"display_name": "Sugarloaf Creek", "id": "c48583e6-6f96-4cc7-a504-e488d8bf3f4c", "name": "Sugarloaf Creek", "state": "active", "vocabulary_id": null}, {"display_name": "Willoughby", "id": "786c9d3d-06fa-48d9-8d18-e2c8bc235a29", "name": "Willoughby", "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": []}}