Attenuating excessive sediment and loss of biotic habitat in an intensively managed midwestern agricultural watershed

C. Lenhart, K. Brooks, J. Magner, B. Suppes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Portions of the 700 km2 Elm Creek watershed in southern Minnesota have undergone watershed and channel improvements over the past decade to mitigate turbidity and biota impairment. Increased row cropping, artificial drainage, channel modifications and precipitation have cumulatively contributed to impairment and channel instability. Uplands that were once a prairie pothole landscape are now predominately drained cornsoybean fields, providing little hydrologic storage and sediment attenuation during peak runoff. Riparian degradation and channel discontinuity characterize much of lower Elm Creek. Wetlands have been restored in the upper watershed to reduce runoff and nutrient loading from croplands. Downstream, a 750 meter riparian corridor of Elm Creek was restored and the channel improved by oxbow reconnection, bluff and streambank protection. Monitoring will document erosion and sediment deposition within the reach and Index of Biotic Integrity (IBI) data will be collected to characterize fish and invertebrate communities in the stream.

Original languageEnglish (US)
Title of host publicationWatershed Management Conference 2010
Subtitle of host publicationInnovations in Watershed Management under Land Use and Climate Change - Proceedings of the 2010 Watershed Management Conference
Pages333-342
Number of pages10
DOIs
StatePublished - Dec 1 2010
EventWatershed Management Conference 2010: Innovations in Watershed Management under Land Use and Climate Change - Madison, WI, United States
Duration: Aug 23 2010Aug 27 2010

Publication series

NameWatershed Management Conference 2010: Innovations in Watershed Management under Land Use and Climate Change - Proceedings of the 2010 Watershed Management Conference
Volume394

Other

OtherWatershed Management Conference 2010: Innovations in Watershed Management under Land Use and Climate Change
CountryUnited States
CityMadison, WI
Period8/23/108/27/10

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