Date of Graduation

8-2012

Document Type

Thesis

Degree Name

Master of Science in Environmental Engineering (MSEnE)

Degree Level

Graduate

Department

Biological and Agricultural Engineering

Advisor

Brian E. Haggard

Committee Member

J T. Scott

Second Committee Member

Julian L. Fairey

Keywords

Applied sciences, Earth sciences, Arkansas, Nutrient loads, Water quality, Watershed management

Abstract

Nitrogen, phosphorus, and sediment transport is a concern for Northwest Arkansas due to high exports through riverine discharge. Urban, agricultural, and pastured watersheds have been associated with increased N, P, and sediment concentrations when compared to forested catchments. The objective of this study was to evaluate discharge and nutrient loads associated with a small urban, agricultural (row crop), wetland influenced, and pasture/farmland sub-catchment within four ephemeral drainages and located at the Watershed Research and Education Center in Fayetteville, AR. Samples were collected during base flow conditions and periodic storm flow conditions from 2009-2012. Flow adjusted concentration trends were used to develop seasonal and annual constituent loads for each catchment. A strong correlation between discharge and N, P, and sediment (r>0.896, p

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