Download: Geofabric Hydrology Reporting Catchments  (FGDB, 90MB)

Abstract This downloadable dataset is part of the Australian Hydrological Geospatial Fabric (AHGF) also known as the Geofabric. Geofabric Hydrology Reporting Catchments includes two related views of hydrological catchments used for analysis and reporting. The first is a topological network view, which shows catchments as a simplified node-link network. This network uses a selection of contracted nodes, known as AHGF Nodes, and the links between them, called AHGF Links. The second view focuses on catchments themselves, using contracted catchments known as AHGF Contracted Catchments. These are made by grouping smaller catchments and linking them to contracted nodes in the network.They form the building blocks for reporting regions, such as those used in the Geofabric Hydrology Reporting Regions. AHGF Nodes are points of hydrological significance that carry identity. They include places where major named streams meet, where streams reach the coast, where water flows into or out of waterbodies, and inland sinks. A new type of node, called a diffuse node, represents areas where water flows from multiple points such as coastal outlets, deltas, or between catchments. AHGF Links are the connections between contracted nodes in the simplified network. AHGF Contracted Catchments are catchment polygons that group smaller catchments and link them to contracted nodes. These catchments are part of a hierarchy and can be grouped based on upstream flow relationships. This product includes five feature types: Node, Link, Contracted Catchment, Node-Link Connectivity (upstream), and Node-Link Connectivity (downstream). Product Schema: [Visio-AHGF_GDB_HRCatchments_Schema_V2_1_release.vsd] Data Dictionary: [ahgf_data_dictionary_hydrology_reporting_catchments_V2_1_release.pdf] Data Product Specifications: [ahgf_dps_hydrology_reporting_catchments_V2_1_release.pdf] Currency Date modified: 2022 Modification frequency: As needed Data extent Spatial extent North: -8.9° South: -44.0° East: 154.1° West: 112.8° Source information Downloaded from the geofabric download page on the 17th of April 2025: [Downloads: Geofabric: Water Information: Bureau of Meteorology] Lineage statement Geofabric Hydrology Reporting Catchments is part of a suite of Geofabric products developed by the Australian Bureau of Meteorology. The geometry for this product is based on the Geofabric Surface Network. It includes AHGF Nodes, AHGF Links, AHGF Contracted Catchments, and Node-Link Connectivity tables for tracing upstream and downstream flow. Each AHGF Contracted Catchment has an outflow point based on a Contracted Node and the boundaries of the underlying AHGF Catchments. The feature class names used in this product have been adjusted to reflect the structure of its underlying data model. AHGF Contracted Catchments are made by combining 1-second catchments that share a common area. These areas are defined by the location of a Contracted Node, which is drawn from both the Geofabric Surface Cartography and Surface Network products. The types of contracted nodes and their confidence levels are explained in the Geofabric Product Guide. To create this dataset, feature classes in the Geofabric Maintenance Geodatabase were recompiled and given unique Hydro-IDs using ESRI ArcHydro for Surface Water (version 1.4.0.180 and ApFramework 3.1.0.84). These feature classes were then extracted and reassigned to the Geofabric Hydrology Reporting Catchments Feature Dataset within its dedicated geodatabase. The Digital Atlas of Australia team at Geoscience Australia made minor geometry repairs to support online publication. They also updated cartographic elements such as visibility, labels and symbology to improve accessibility and performance. Contact Bureau of Meteorology, Community Services Group, [ahgf@bom.gov.au]