PIHMgis v1.0 Tutorial Header

PIHMgis: A “Tightly Coupled” GIS Framework for PIHM Version: 1.0 Users Guide July 10, 2007 Hydrology Group Civil & Environmental Engineering Pennsylvania State University, University Park, USA. Table of Content 1. Introduction 12. Initial Setup 13. Understanding PIHMgis Framework 14. Raster Processing 4 4.1 Fill Pits 4 4.2 Flow Grid 5 4.3 Stream 7 4.4 Link 9 4.5 Polyline 11 4.6 Catchment Grid 12 4.7 Polygon 145. Vector Processing 16 5.1 Polygon to Line 16 5.2 Simplify Line 18 5.3 Split 21 5.4 Vector Merge 226. Domain Decomposition 24 6.1 Read ShapeTopology 24 6.2 Run TRIANGLE 25 6.3 TIN Generation 277. DataModel Loader 29 7.1 Mesh File 29 7.2 Att 30 7.3 Riv 32 7.4 Para File 348. Run PIHM 369. Analysis 37 9.1 Time Series Plots 37 9.2 Spatial Plots 38 PIHMgis Users Guide v1.0 1. Introduction Physically-based fully-distributed hydrologicmodels seek to simulate hydrologic state variables in space and time while using heterogeneous input data for climate, land use, topography and hydrogeology. In the process of incorporating several physical data layers in a hydrologic model requires intensive effort in data gathering, development as well as topology definitions. Traditionally Geographic Information System (GIS) has been used for data management, data analysis and visualization. Joint use and development of sophisticated numerical models and commercial GIS systems poses challenges that ...