Theses and Dissertations



Ramirez-Avila, John J.

Committee Member

Freyne, Seamus F.

Committee Member

Locke, Martin A.

Date of Degree


Original embargo terms

Embargo 1 year

Document Type

Graduate Thesis - Open Access


Civil Engineering

Degree Name

Master of Science (M.S.)


James Worth Bagley College of Engineering


Department of Civil and Environmental Engineering


Understanding the dynamics of agricultural basins has been difficult for decision-makers when developing cost-effective plans. An uncertainty analysis evaluates the impact of information gaps on hydrologic model’s output and performance. The Agricultural Policy/Environmental Extender (APEX v1501) was used to predict runoff, crop yield, sediment load, total phosphorus, and total nitrogen from agricultural fields in the Mississippi Delta to investigate the impact of using different input variables (climate, soils, and management practices) on mechanistic models. Results indicated that the use of surrogate information such as weather data from close weather stations, a predominant soil series, and simulated irrigation schedules, could be considered when available in situ information is restricted. Overall results provided information on model setup and output interpretation that may be useful to Mississippi Delta decision-makers.

Available for download on Thursday, May 15, 2025