The Environmental Modeling Research Laboratory (EMRL) of Brigham Young University specializes in computer graphics programs for pre and post processing of watershed, surfacewater, and groundwater modeling. Partnering with the U.S. Army Corps of Engineers Waterways Experiment station EMRL has performed research and development of three popular software programs for engineering analysis. The BYU module contains the following:

WMS (Watershed Modeling System) was described in GIS Hydro '98 and this year's update includes information on WMS-Hydro a new extension for ArcView GIS. The WMS-Hydro extension for ArcView 3.x helps to prepare and transfer key watershed modeling data themes from ArcView to WMS for hydrologic model development. Another important addition to the latest version of WMS is a new time of concentration calculator which uses digital terrain data and flow path arc segments to define/evaluate equations such as those used in TR-55 and the FHWA. This module was prepared by Dr Jim Nelson of the Dept. of Civil and Environmental Engineering of BYU.

GMS (Groundwater Modeling System) was also included in the GIS Hydro '98 and includes updated information on an improved map module which links GMS to ArcView by using coverages to define groundwater modeling domains and boundary conditions. GMS remains the state of the art in groundwater modeling development by continuing to add interfaces to models such as MT3DMS, RT3D, SEAM3D, and NUFT. This module was prepared by Dr Norm Jones of the Dept. of Civil and Environmental Engineering of BYU.

SMS (Surface-Water Modeling System) uses the same map module for linking to ArcView as WMS and GMS. It is a new inclusion to GIS Hydro '98 and describes how GIS layers can be used to develop finite element and finite difference models including boundary conditions for popular 2D surface water models such as RMA-2 and FHSWMS. This module was prepared by Dr Alan Zundel of the Dept. of Civil and Environmental Engineering of BYU.

These materials may be used for study, research, and education, but please credit the authors and the Environmental Modeling Research Laboratory, Brigham Young University. All commercial rights reserved. Copyright 1999 Environmental Modeling Research Laboratory.