Hanaa Fayyadh

Document Type

Thesis - University Access Only

Award Date

2011

Degree Name

Master of Science (MS)

Department / School

Civil and Environmental Engineering

Abstract

Relations of water quality to streamflow were determined for total phosphorus (TP), total alkalinity (TAik), total dissolved solids (TDS), specific conductance (SC) and total suspended solids (TSS) in addition to SC and TDS relation at two surface water quality stations within the drainage area of the James River in South Dakota. The study areas are Columbia and Huron stations and the study years are the water years 1975-2008. Streamflow data for the study years were analyzed statistically using Log Pearson Type III distribution and then divided into Wet and Dry years. Trends in parameters concentration with flow and the trend in parameters load during Wet and Dry years at both stations were studied. Trends in parameter concentrations show different relationships. TP and TSS concentration during Wet and Dry years showed no trend at both stations. TAlk and TDS concentrations trend showed an inverse relation with the logarithm of the streamflow during Wet years and showed no trend during Dry years at both stations. Negative slopes indicated a decrease in concentration at high flow because of dilution process. The slope of regression lines for graphs of streamflow versus load shows a linear relation with positive slope for TP, TAik, TDS, and TSS at Columbia and Huron stations during Wet and Dry years. TP and TSS showed a higher trend line slope for Wet years and a lower slope for Dry years at Huron station compared with Columbia station. At Huron station, the relation is stronger than the relation at Columbia for TP and TSS load trend during Wet and Dry years. TAlk and TDS shows approximately the same trend slope at both stations during Wet and Dry years. SC shows an inverse relation with the logarithm of the streamflow during Wet years while the relation during Dry years shows no trend at both stations. As expected a strong relationship was found to exist between SC and TDS concentration at both stations during Wet and Dry years. In general, at Columbia station TP, TSS, TAik and TDS trend line show higher slopes during Dry years. At Huron station TP trend line shows lower slope during Dry years while TSS trend line shows approximately the same slope during Wet and Dry years. TAlk and TDS trend line shows higher slope during Dry years at Huron station. At both stations, specific conductance shows inverse relation with the logarithm of the streamflow in Wet years and shows no trend in Dry years. Specific Conductance and TDS shows a strong relation during Wet and Dry years at both stations.

Library of Congress Subject Headings

Water quality -- James River (N.D. and S.D.)

Streamflow -- James River (N.D. and S.D.)

Format

application/pdf

Number of Pages

149

Publisher

South Dakota State University

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