Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School


First Advisor

Lois Haertel


Lake Cochrane was selected for this study because of its history of superior water transparency (Haertel 1972, 1976b). Significant amounts of silt and chemicals enter the lake with runoff at 3 locations (Haertel unpublished data). Restriction or impediment of runoff at these locations should result in improved water transparency (Haertel 1976b, Siegel 1975). Therefore, East Dakota Conservancy Sub-District and the South Dakota Department of Wildlife, Parks, and Forestry decided to impede runoff waters by means of 3 sediment-control dams incorporated into the perimeter road system of the lake and financed through a grant from the Environmental Protection Agency (Siegel 1975) (Figure 1). The dams were designed to slow the movement of runoff water allowing sediment particles and sorbed nutrients to "settle out". The objectives of this study were to: (1) evaluate the oxygen light and dark bottle method as a means of estimating primary productivity, and (2) estimate, during the open-water seasons, spatial and temporal variation of certain water quality parameters in Lake Cochrane during and after construction of the sediment-control dams.

Library of Congress Subject Headings

Dams -- South Dakota -- Design and construction
Sediment control
Primary productivity (Biology) -- South Dakota -- Lake Cochrane
Lake Cochrane (S.D.)




South Dakota State University

Included in

Biology Commons