INTRODUCTION V // 1 Digital Elevation Model Issues in Water Resources Modeling i // 2 Preparation of DEMs for Use in Environmental Modeling Analysis 29 // 3 Source Water Protection Project: A Comparison of Watershed Delineation Methods in ARC/INFO and ArcView CIS 53 // 4 DEM Preprocessing for Efficient Watershed Delineation 65 // 5 CIS Tools for HMS Modeling Support 85 // 6 Hydrologic Model of the Buffalo Bayou Using CIS ? 13 // 7 Development of Digital Terrain Representation for Use in River Modeling 145 // 8 HEC-GeoRAS: Linking GIS to Hydraulic Analysis Using ARC/INFO and ???-RAS iyy // 9 Floodplain Determination Using ArcView GIS and HEC-RAS 177 // 10 The Accuracy and Efficiency of GIS-Based Floodplain Determinations 191 // / SELECTED BIBLIOGRAPHY 213