Digital Terrain Model (DTM) _ Tool

This is a tool that uses the DTM files and performs a range of analyses and generates model inputs for a several hydrologic, hydraulic and hydrodynamic models including:

HEC-HMS and HEC-RAS

Some of the parameters generated are drainage areas, SCS Curve Numbers (CN), slopes and flow lengths.  Curve numbers are generated from a soils polygon coverage from a variety of sources.  Future versions will include the ability to evaluate land use and calculate percent imperviousness for the hydrologic computations  based on aerial photography.

CE-QUAL-W2

The CE-QUAL-W2 model is a 2D hydrodynamic and water quality model widely used in many lakes and estuaries.  The model bathymetry (i.e. grid) can be generated using the tool.  Multiple branches and variable segmentation is easily handled.

Environmental Fluid Dynamics Code (EFDC)

The EFDC (Environmental Fluid Dynamics Code) model is a three dimensional (3D) hydrodynamic and water quality model.  The model was developed at the Virginia Institute of Marine Science by John Hamrick.  The model has been applied to a large range of conditions from near shore dynamics, estuaries/bays, lakes/reservoirs and river systems  Model grid and cell properties for the 3D sigma stretch version and the new 1D version can be generated by the tool.

GSTARS 2.1

GSTARS 2.1 (Generalized Stream Tube model for Alluvial River Simulation, Version 2.1) is a generalized water and sediment-routing computer model that can be used to solve complex river engineering problems for which limited data and resources were available (Yang & Simões, 2001)