Theses and Dissertations

Date of Award


Document Type


Degree Name

Master of Science (MS)


Civil Engineering

First Advisor

Dr. Jungseok Ho

Second Advisor

Dr. Andrew Ernest

Third Advisor

Dr. Abdoul A. Oubeidillah


During a high intensity storm events, a series of catastrophic events occur. These catastrophic events include flooding and destruction of infrastructure. Engineers have determined a method to design for high intensity storms based off hydrologic analysis of previous storms. With this data engineers can determine the outflow of major rivers and streams that may impact infrastructure. By determining the watershed engineers can predict the flow of the water and as well as the location of the outfall. In the Rio Grande Valley, water quality is very important because after rain events stormwater from cities is carried out towards the Laguna Madre, which is home to an array on environmental habitats and wildlife. With the determination of the watershed boundaries of this region, engineers and environmentalists can use this data to determine where pollution source points that can affect the environment are located.

This project will simulate the watershed boundaries for the region of the Lower Laguna Madre using ArcGIS in conjunction with the extension HEC-GeoHMS, a tool developed by the Hydrologic Engineering Core. With the use of a Digital Elevation Model (DEM) provided by the United States Geologic Survey, the watershed boundaries were delineated using both ArcGIS and the HEC-GeoHMS extension. These watershed boundaries were then compared to existing watershed boundaries in the region to check the validity. The Rio Grande Valley is considered a flat region that does not have a very erratic change in slope, it is also covered by a series of canals and streams; because of these factors found in the terrain, an exact delineation is hard to determine. With the completion of the watershed delineation and the development of the hydrologic model in the area will developed to simulate the impact of the resacas in the region.


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