{"help": "https://data.gov.au/data/en/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author_email": null, "contact_point": "clientservices@ga.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "5f8ee3f5-8257-486c-9857-a42c6fc5be74", "isopen": false, "language": "eng", "license_id": "notspecified", "license_title": "notspecified", "maintainer": null, "maintainer_email": null, "metadata_created": "2025-10-17T02:17:15.108139", "metadata_modified": "2025-10-17T02:17:15.108147", "name": "open-source-flood-simulation-with-a-2d-discontinuous-elevation-hydrodynamic-model1", "notes": "A new finite volume algorithm to solve the two dimensional shallow water equations on an unstructured\ntriangular mesh has been implemented in the open source ANUGA software, which is jointly developed\nby the Australian National University and Geoscience Australia. The algorithm supports discontinuouselevation,\nor `jumps in the bed profile between neighbouring cells. This has a number of benefits compared\nwith previously implemented continuous-elevation approaches. Firstly it can preserve stationary states at wetdry\nfronts without using any mesh porosity type treatment. It can also simulate very shallow frictionally\ndominated flow down sloping topography, as typically occurs in direct-rainfall flood models. In the latter situation,\nmesh porosity type treatments lead to artificial storage of mass in cells and associated mass conservation\nissues, whereas continuous-elevation approaches with good performance on shallow frictionally dominated\nflows tend to have difficulties preserving stationary states near wet-dry fronts. The discontinuous-elevation\napproach shows good performance in both situations, and mass is conserved to a very high degree, consistent\nwith floating point error.\nA further benefit of the discontinuous-elevation approach, when combined with an unstructured mesh, is that\nthe model can sharply resolve rapid changes in the topography associated with e.g. narrow prismatic drainage\nchannels, or buildings, without the computational expense of a very fine mesh. The boundaries between such\nfeatures can be embedded in the mesh using break-lines, and the user can optionally specify that different\nelevation datasets are used to set the elevation within different parts of the mesh (e.g. often it is convenient to\nuse a raster DEM in terrestrial areas, and surveyed channel bed points in rivers).\nThe discontinuous elevation approach also supports a simple and computationally efficient treatment of river\nwalls. These are arbitrarily narrow walls between cells, higher than the topography on either side, where\nthe flow is controlled by a weir equation and optionally transitions back to the shallow water solution for\nsufficiently submerged flows. This allows modelling of levees or lateral weirs much finer than the mesh size.\nA number of benchmark tests are presented illustrating these features of the algorithm. All these features\nof the model can be run in serial or parallel, on clusters or shared memory machines, with good efficiency\nimprovements on 10s-100s of cores depending on the number of mesh triangles and other case-specific details", "num_resources": 2, "num_tags": 3, "organization": {"id": "91f054ec-d0c3-4d42-a89a-5daa2c7a6818", "name": "geoscience-australia-data", "title": "Geoscience Australia Data", "type": "organization", "description": "Harvester for Geoscience Australia Data", "image_url": "", "created": "2025-06-23T12:29:08.024111", "is_organization": true, "approval_status": "approved", "state": "active"}, "original_harvest_source": {"site_url": "https://ecat.ga.gov.au", "href": "https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/open-source-flood-simulation-with-a-2d-discontinuous-elevation-hydrodynamic-model1", "title": "Geoscience Australia"}, "owner_org": "91f054ec-d0c3-4d42-a89a-5daa2c7a6818", "private": false, "promotion_level": "0", "spatial": "Australia", "state": "active", "temporal_coverage_from": "2018-04-11 00:32:01", "title": "Open Source Flood Simulation with a 2D Discontinuous Elevation Hydrodynamic Model", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "c58f14eb-b8cd-402c-b288-8d323b72e1d7"}, {"key": "harvest_source_id", "value": "00080910-39e7-408f-882c-e6e1eb6baadb"}, {"key": "harvest_source_title", "value": "Geoscience Australia"}], "resources": [{"cache_last_updated": null, "cache_url": null, "created": "2025-10-17T02:17:15.109666", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "description": "Link to article", "format": "PDF", "hash": "", "id": "5e4bfe64-5989-42f8-8a5e-71a330528632", "last_modified": null, "metadata_modified": "2025-10-17T02:17:15.101445", "mimetype": null, "mimetype_inner": null, "name": "Link to article", "package_id": "5f8ee3f5-8257-486c-9857-a42c6fc5be74", "position": 0, "resource_locator_function": "", "resource_locator_protocol": "WWW:LINK-1.0-http--link", "resource_type": null, "size": null, "state": "active", "url": "https://pdfs.semanticscholar.org/4abe/1b4137742f7d845823283262205b33648294.pdf", "url_type": null, "zip_extract": false}, {"cache_last_updated": null, "cache_url": null, "created": "2025-10-17T02:17:15.109670", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "description": "", "format": "HTML", "hash": "", "id": "2660eaa3-7b5b-4166-82d2-bad8f6ff90e5", "last_modified": null, "metadata_modified": "2025-10-17T02:17:15.101746", "mimetype": null, "mimetype_inner": null, "name": "Unnamed resource", "package_id": "5f8ee3f5-8257-486c-9857-a42c6fc5be74", "position": 1, "resource_locator_function": "", "resource_locator_protocol": "", "resource_type": null, "size": null, "state": "active", "url": "http://www.abs.gov.au/ausstats/abs@.nsf/Latestproducts/1297.0Main%20Features32008?opendocument&tabname=Summary&prodno=1297.0&issue=2008&num=&view=", "url_type": null, "zip_extract": false}], "tags": [{"display_name": "External Publication", "id": "2ef95c3e-4342-4e16-af22-7360303a3b7b", "name": "External Publication", "state": "active", "vocabulary_id": null}, {"display_name": "Published_External", "id": "5178775c-8044-4b7f-881f-5428a4e2d925", "name": "Published_External", "state": "active", "vocabulary_id": null}, {"display_name": "Surfacewater Hydrology", "id": "473d98de-b460-417d-9c07-a19644b5d576", "name": "Surfacewater Hydrology", "state": "active", "vocabulary_id": null}], "groups": [], "relationships_as_subject": [], "relationships_as_object": []}}