ArcGIS Hydro Model Tutorial

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• NextDownID: Integer – The HydroID of the next downstream area in this drainage area class. This is used tosupport Area to Area navigation within a set of drainage areas.Subtypes: NoneRelationships: NoneCatchmentCatchment is a polygon subclass of DrainageArea. A Catchment feature class is an elementary drainage area produced bysubdivision of the landscape using a consistent set of physical rules. Typically, this subdivision is carried out bydefining a stream network from a threshold flow accumulation on a Digital Elevation Model, and then delineating aCatchment for each stream segment in the network.The Catchment Polygon feature class does not define any additional attributes. The user can add attributes as necessary.Subtypes: NoneRelationships: None18 • ArcGIS Hydro Data Model
WatershedThe Watershed feature class is a subclass of Drainage Area, which contains a landscape subdivision into human-selecteddrainage areas, which may drain to a point on a river network, to a river segment or to a waterbody. By contrast toCatchments, which can be automatically delineated using a set of rules applied to a terrain model, the definition ofWatersheds requires a human intervention process, where the analyst selects and edits the Watershed subdivision of thelandscape unit the desired arrangement is obtained.The Watershed Polygon feature class does not define any additional attributes. The user can add attributes asnecessary.Subtypes: NoneRelationships: WatershedhasJunction is a 1 to 1 relationship between HydroJunction (using HydroID) and Watershed(using JunctionID).ArcGIS Hydro Data Model • 19
Page 1: ArcGIS Hydro Data ModelArcGIS Hydro
Page 6: HydroEdgeThe HydroEdge class contai
Page 9 and 10: SchematicLinkThe Schematiclink and
Page 11 and 12: HydroEventThe HydroEvent abstract o
Page 13 and 14: HydroLineEventThe HydroLineEvent, s
Page 15 and 16: HydroFeatureAll simple feature clas
Page 17: DrainageAreaDrainageArea is an abst
Page 21 and 22: DrainagePointDrainagePoint is a sub
Page 23 and 24: CHANNELThe Channel feature dataset
Page 25 and 26: ChannelFeatureThe purpose of the Ch
Page 27 and 28: Relationships: CrossSectionHasPoint
Page 29 and 30: HYDROGRAPHYThe Hydrography feature
Page 31 and 32: HydrographyThe Hydrography abstract
Page 33 and 34: HydroPointThe HydroPoint class cont
Page 35 and 36: BridgeA bridge is a structure that
Page 37 and 38: MonitoringPointMonitoring points ar
Page 39 and 40: WaterDischargeWater discharge point
Page 41 and 42: HydroLineThe HydroLine class is des
Page 43 and 44: WaterbodyThe Waterbody class is sub
Page 45: • TSValue - Double: TSValue conta

ArcGIS Hydro Model Tutorial

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