The custom Geo-MODSIM data model is applied to developing georeferenced MODSIM networks
by creation of an ESRI geometric network in ArcGIS using imported feature classes such as
the National Hydrologic Dataset (NHD) stream and canal layers, reservoirs, gauging stations, diversion
structures, and wells. Various tools programmed under the MS .NET Framework utilize ESRI
ArcObjects® to develop a MODSIM-compatible georeferenced network of river basin features from
the geometric network, and then perform all data import, processing, network simulation, and display
of scenario results entirely within the ArcMap® interface to ArcGIS, which essentially serves
as the GUI for MODSIM. This allows full exploitation of all spatial data processing and display
functionality in ArcGIS for development of MODSIM data sets, and establishes Geo-MODSIM as
a spatial decision-support system for river basin management.