文档介绍：Water Resource Protection by Riparian Buffer Zones
Roy R. Gu Mahesh K. Sahu
College of Environmental Sciences and Engineering Dept. of Civil, Constr. and Environmental Engineering
South China University of Technology Iowa State University
Guangzhou, China Ames, Iowa, USA
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Abstract—Growing switch-grass in a riparian buffer zone can be one The objective of this study is to investigate the
of future best management practices in water resource protection. effectiveness of riparian buffer strips of perennial plants having
Switch-grass requires no fertilizers and less land and water. It was bio-fuel potential in reducing NO3-N load to streams in an
recently found to be a good source of biomass. In this study, Soil and agricultural watershed. The Soil and Water Assessment Tool
Water Assessment Tool (SWAT) model was applied to a watershed (SWAT) was applied to the Walnut Creek watershed, Iowa for
to examine the effectiveness of buffer zones of switch-grass in this purpose. The simulations of the watershed were conducted
reducing pollutants (nitrate) from crop fields to rivers or lakes. to identify high impact sub-basins based on total and per unit
Numerical experiments were conducted to identify potential sub-
area NO3-N yield. The responses of the two types of high
basins in the watershed that have high impact and to assess the