A conceptual model is a map-based representation of the hydrologic or hydraulic model using map module objects (feature objects) such as points, nodes, arcs, and polygons. To define and compute lumped-parameter model data, WMS normally converts a map module representation of the model to a schematic or tree-based representation of the model in either the hydrologic modeling or river module. When creating a conceptual model of hydrologic data (basins, streams, and outlet points), the schematic representation is created automatically. When creating a conceptual model of hydraulic data, the schematic representation is created by selecting the Map→1D Schematic menu item available in the special menu associated with the hydraulic modeling coverage (This command is available in 1D Hydraulic Schematic and Storm Drain coverages). After selecting the Map→1D Schematic command, cross sections, reaches, links, and/or nodes are displayed as symbols in the river module and their properties can be edited in that module.
As an example, a SWMM hydraulic model with arcs representing links and nodes in a SWMM model and the symbols corresponding to links and nodes in the hydraulic schematic is shown below:
WMS – Watershed Modeling System
|Modules:||Terrain Data • Drainage • Map • Hydrologic Modeling • River • GIS • 2D Grid • 2D Scatter|
|Models:||CE-QUAL-W2 • GSSHA • HEC-1 • HEC-HMS • HEC-RAS • HSPF • MODRAT • NSS • OC Hydrograph • OC Rational • Rational • River Tools • Storm Drain • SMPDBK • SWMM • TR-20 • TR-55|
|Toolbars:||Modules • Macros • Units • Digitize • Static Tools • Dynamic Tools • Drawing • Get Data Tools|