Theses and Dissertations

Issuing Body

Mississippi State University


Huddleston, David

Committee Member

Shindala, Adnan

Committee Member

Martin, James

Committee Member

Kingery, William

Date of Degree


Document Type

Graduate Thesis - Open Access


Civil Engineering

Degree Name

Master of Science


College of Engineering


Department of Civil Engineering


Nutrient enrichment, which can be detrimental to the health of aquatic systems, is one of the leading causes of impairment of our Nations? waters. Development and initial calibration of a hydrologic, hydrodynamic, and water quality model of dissolved oxygen and nutrient concentration for the St. Louis Bay watershed in coastal Mississippi is documented herein. The model was developed using the USEPA BASINS 3.0 analysis system and WinHSPF, a comprehensive watershed loading and transport modeling software. The resulting model simulates significant watershed and instream physical, chemical and biological processes including rainfall runoff and associated water quality from a variety of land use categories. Extensive data describing the study area, land use practices, hydrology and water quality are presented, analyzed and discussed relative to model development and adequacy to support future modeling projects. Integration of this data into a valuable water quality assessment model and preliminary model calibration is also presented.