Theses and Dissertations

Date of Award


Document Type


Degree Name

Master of Science (MS)


Civil Engineering

First Advisor

Dr. Abdoul Oubeidillah

Second Advisor

Dr. Jongmin Kim

Third Advisor

Dr. Jungseok Ho


The Lower Laguna Madre (LLM) is considered impaired because of the high concentration of bacteria and low level of dissolved oxygen (DO). LLM receives freshwater from the Lower Rio Grande Valley (LRGV) watershed. In other to understand the impairment, LRGV watershed is being studied by relying on water quality data of the contributing drainages and State resource geographic data to identify watershed boundary and pollutant sources.

The study on the North and Central LRGV watershed shows some correlation between the concentration of E. coli/Bacteria, Ammonia, Total Kjeldahl Nitrogen, Total Phosphorus, Nitrate and Nitrite, Chlorophyll-a and the sources of pollutant in the watershed.

The ongoing research into the LRGV watershed shows that the leading cause of impairment in LLM estuary is the agricultural activities, followed by industrial waste management, and the influence of urbanized area in the LRGV watershed.


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