Document Type

Article

Peer Reviewed

1

Publication Date

1994

Journal/Book/Conference Title

Geographical Bulletin

Start Page

44

End Page

49

Abstract

Determination of the source of sediment in rivers and streams is important in order to effectively implement a program to reduce its concentration. This project uses agricultural chemicals as indicators of current sources of sediment from farm fields in the Cedar River, Iowa watershed. We hypothesized that the relations of sediment, nitrogen, and phosphorous yields to precipitation would indicate whether sediment originated from erosion of fields or from channel bank erosion of floodplains. The changes in sediment, nitrate, and phosphorus in the channel in response to rainfall events were determined. In simple regressions, all three variables have similar slopes when regressed on seven-day precipitation sums. On the basis of the results of the regressions, it appears that, for the months used for this project, the major source of channel sediment is agricultural land. KEW WORDS: nitrate, non-point source pollution, phosphorous, sediment, water quality.

Keywords

sustainability

Journal Article Version

Version of Record

Published Article/Book Citation

Geographic Bulletin, 36 (1994), pp. 44-49

Rights

Copyright © Gamma Theta Upsilon, 1994. Posted by permission of the publisher.

Included in

Geography Commons

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URL

https://ir.uiowa.edu/geog_pubs/10