WATER QUALITY DATA AND SIMULATION MODEL IN GIS FOR THE RIO BRAVO/GRANDE BASIN

摘要

In previous research, the Center for Research in Water Resources (CRWR) of TheUniversity of Texas at Austin, and the National Water Commission (CNA) ofMexico cooperated to develop the Rio Grande/Bravo database in which most of thedata are referenced geographically (i.e., a geodatabase). The geodatabase consists ofa Geographic Information System (GIS) and a relational database containinghydrologic, hydraulic and related data for the basin. The ArcHydro data modelstructure was used as the basis of the geodatabase since it allows the river basin to berepresented in a realistic network of upstream to downstream connections. TheArcHydro data model defines attributes, relationships and connectivity betweenhydrologic features in a GIS database. Once the Rio Grande/Bravo geodatabase wascreated, it used in various water management agencies within the U.S. and Mexico.In this project, CRWR and CNA have cooperated to build on their previous results toaccomplish three tasks: (1) add water quality data to the Rio Grande/Bravogeodatabase; (2) add water related infrastructure data to the Rio Grande/Bravogeodatabase; and (3) determine the main river segments in this basin to be used inwater quality modeling. Also, some water quality simulations have been started forthe rio Bravo/Grande basin, based on the water quality data model.