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Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Gully Hydraulics ♦ Grass Hedge Effect ♦ Flow Depth ♦ Natural Gully ♦ Current Practice ♦ Incised Stream ♦ Floodplain Field ♦ Flow Channel ♦ Economic Reason ♦ Laboratory Gully ♦ M3 S-1 ♦ Soil Pore Water Pressure ♦ Synthetic Trapezoidal-shaped Hydrographs ♦ Artificial Runoff Event ♦ 5-m Vertical Interval ♦ Plastic Pipe ♦ Natural Runoff Event ♦ Earthen Embankment ♦ Habitat Recovery ♦ Native Vegetation ♦ Trapezoidal Channel ♦ Concentrated Flow ♦ Riparian Zone ♦ Panicum Virgatum ♦ Stream Channel ♦ Five-month Period ♦ Peak Discharge Rate ♦ Outdoor Laboratory
Abstract ABSTRACT. Concentrated flow can cause gully formation on sloping lands and in riparian zones adjacent to incising stream channels. Current practice for riparian gully control involves blocking the gully with a structure comprised of an earthen embankment and a metal or plastic pipe. Measures involving native vegetation would be more attractive for habitat recovery and economic reasons. To test the hypothesis that switchgrass (Panicum virgatum L.) hedges planted at 0.5-m vertical intervals within a gully would control erosion, we established a series of hedges in four concentrated flow channels. Two of the channels were previously eroded trapezoidal channels cut into compacted fill in an outdoor laboratory. The other two channels were natural gullies located at the margin of floodplain fields adjacent to an incised stream. While vegetation was dormant, we created artificial runoff events in the two laboratory gullies and one of the natural gullies using synthetic trapezoidal-shaped hydrographs with peak discharge rates of approximately 0.03, 0.07, and 0.16 m3 s-1. During these tests we monitored flow depth, velocity, turbidity, and soil pore water pressures. The fourth gully was subjected to a series of natural runoff events over a five-month period with peaks up to 0.09 m3 s-1. Flow depths in all tests 1 Author to whom correspondence should be addressed.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article