CE 394 – GIS in Water Resources Rio Bravo – Rio Grande Water Resources Simulation Exercise Jason Batchelor EWRE – LBJ Joint Degree Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Outline Background Purpose Model / Simulation Theory GIS Work Methods Results Future Work Questions Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Background Rio Bravo – Rio Grande is entirely adjudicated Two treaties, 1906 & 1944, apportioned water between US & Mexico Scope of this project is from Rio Conchos to Gulf; 1944 Treaty states amount of water to US shall “not be less, as an average amount in cycles of five consecutive years, than 350,000 acre-feet annually.” Dispute over “Water Debt” IBWC / CILA operate reserviors River did not reach the Gulf of Mexico – sandbar formed from silt and had to be manually removed Situation is not getting any better – the Region is in a drought, and population is increasing (43% growth between 1990-2000 in Mexico and Acre-foot of water is equal to 214,000 gallons of water US and Mexico each have a “Watermaster” to allocate water to water rights holders (US/Texas – TNRCC, Mexico – Comision Nacional de Agua) International Boundary and Water Commission – Commision Internacional de Limites y Aguas is a bi-national Commission operates the reserviors as indicated by each of the two bodies. Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Geography Lesson Major Features Rio Bravo – Rio Grande Reservoirs Rio Conchos Pecos River Rio Salado Border Cities Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Purpose Use GIS as an integrated graphic display in a watershed modeling exercise. In February 2002, the LBJ School of Public Affairs hosts a simulation exercise wherein, the United States and Mexico will examine water quantity and water quality issues along the Rio Bravo - Rio Grande. The exercise will utilize the OASIS water resources model to examine the operation of the river and reservoirs, as well as the decisions and interaction of the participants. The intent of using ArcGIS is to provide a graphic representation of the data as the simulation occurs. I plan to accomplish this by formatting the output files from the Oasis Watershed Model as input files for the data tables within GIS. Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Simulation Theory Purpose is to generate dialogue and new approaches to problem solving. Allows participants to make decisions and see the effects without repercussion. First time many participants will be in the same room. One month time steps, using historical meteorological and weather data to provide hydrological data. Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Model OASIS with OCLTM, Hydrologics, Inc. developed and written by Dan Sheer Models human behavior, rather than trying to maximize a system Rules vs Goals www.hydrologics.net Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise GIS Three Levels of Production 1. Base map with OASIS schematic 2. Display time step results for Irrigation Districts 3. Fully developed Graphic User Interface Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Why GIS? OASIS, only outputs graphs & tables Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise GIS – Base Map Contacted Miguel Pavon, at the Border Information Center at TNRIS Received shapefile of the basin Problems with the data Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise GIS - Problems Should be ovelapping Had to manually define the projection – Using DEFINE PROJECTION WIZARD Then I had to put all of my data layers into the same projection and geographic coordinates – Using PROJECT WIZARD Undefined Projection for rgbasin.shp Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise GIS – Problem Solving Now to create and add all of the necessary data layers Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise GIS – OASIS Schematic Excel .dbf table Latitude & Longitude in DD Display XY Event Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise GIS – Multi-Layers Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Future Work Irrigation Districts Graphical User Interface Rio Bravo - Rio Grande Water Resources Simulation Exercise

Rio Bravo - Rio Grande Water Resources Simulation Exercise Acknowledgements Miguel Pavon, BIC at TNRIS Tanya Hoogerwerf Dr. Dan Sheer, Hydrologics Dr. David Maidment Dr. David Eaton, LBJ Rio Bravo - Rio Grande Water Resources Simulation Exercise