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Modeling Water Flow and Sediment Processes in a Small Gully System on the Loess Plateau of China

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Pp. 326-329 in Soil Erosion Research for the 21st Century, Proc. Int. Symp. (3-5 January 2001, Honolulu, HI, USA). Eds. J.C. Ascough II and D.C. Flanagan. St. Joseph, MI: ASAE.  701P0007.(doi:10.13031/2013.3272)
Authors:   Jannes Stolte, Coen J. Ritsema, Erik van den Elsen, Baoyuan Liu
Keywords:   Soil erosion modeling, Gully system

A single gully system was selected in a small agricultural watershed on the Loess Plateau of China with the objective to simulate water and sediment transport at this scale. The gully has a total length of about 40 meter and is about 30 meter wide. The watershed feeding the gully is about 1800 m2 (included the gully itself). The gully bottom has a slope of about 32 – 40 degrees, whereas the gully walls are from 40 up to a maximum of 60 degrees. Water content of the soil, and water and sediment discharge were measured automatically. The physically based hydrological and soil erosion model LISEM was used to calculate the water and sediment discharge. Calibration has been carried out for one event, and is done by adjusting the saturated conductivity. Results show reasonable comparable figures between the measured and calculated water and sediment discharge. Still, some more validations have to be carried out, with a focus on the measured and calculated soil water content profiles.

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