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Problem Statement:
One of the primary sources of sediment in streams and rivers
is erosion of streambanks. In
fact, as much as 80% of the sediment entering streams in some agricultural
watersheds originate from the stream bank. Stream flow is generally the
only mechanism considered in stream bank erosion. However, in some areas,
ground water flow (either through actual exfiltration, a process known as
seepage or through removal of negative soil pore-water pressure) can
accelerate stream bank erosion. Limited information exists about the role
of ground water flow in the erosion of stream bank sediment even though
this type of erosion occurs in numerous geographical settings. Our research
is implementing field measurements, laboratory experiments, and
conceptual/numerical modeling to quantify and model erosion by subsurface
flow, specifically seepage erosion at this time.
Current Research
Progress
PowerPoint Summary –
2008 USDA National Water Conference
USDA-CSREES
National Water Conference 2009 – St. Louis, MO
Current Funding Support:
QUANTIFYING THE IMPORTANCE OF
SUBSURFACE FLOW INDUCED EROSION ON SEDIMENT LOAD TO STREAMS
Research
supported by the Cooperative State Research, Education, and Extension
Service, U.S. Department of Agriculture, National Research Initiative
Grant, under Award
No. 2005-35102-17209.
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