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| Clarification efficiency of vegetative filter strips on sediment and pesticide in surface runoff |
| Received:November 27, 2016 |
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| KeyWord:vegetative filter strips;sediment;Lambda-cyhalothrin;interception efficiency |
| Author Name | Affiliation | E-mail | | LIU Xing-yu | College of Urban and Environmental Science, Northwest University, Xi'an 710127, China | | | YANG Fang-she | College of Urban and Environmental Science, Northwest University, Xi'an 710127, China
Northwest Water Resources and Environment Ecology Key Laboratory of Ministry of Education at Xi'an University of Technology, Xi'an 710048, China | yangfangshe978@163.com | | LI Huai-en | Northwest Water Resources and Environment Ecology Key Laboratory of Ministry of Education at Xi'an University of Technology, Xi'an 710048, China | | | WANG Hao | College of Urban and Environmental Science, Northwest University, Xi'an 710127, China | | | MA Yi-kun | College of Urban and Environmental Science, Northwest University, Xi'an 710127, China | | | ZHANG Hong-min | College of Urban and Environmental Science, Northwest University, Xi'an 710127, China | | | HAN Chen | College of Urban and Environmental Science, Northwest University, Xi'an 710127, China | |
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| Abstract: |
| In this study, via the field flow experiment, the interception efficiency of Vegetative filter strips (VFS) on sediment and Lambda-cyhalothrin was measured. The results showed that the inflow discharge and vegetation conditions are important influencing factors for sediment retention. The higher the inflow concentration of Lambda-cyhalothrin is, the more quickly the VFS's sectional concentrations decrease with the length. When the inflow concentrations are 0.3, 0.6, 0.9 mg·L-1, the interception rate of the herb VFS on Lambda-cyhalothrin are 61%, 71%, 75%, respectively, and the interception rate of the shrub-herb VFS on Lambda-cyhalothrin are 52%, 69%, 74%, respectively. The greater the inflow discharge is, the lower the VFS's sectional concentrations decrease lengthwise. When the inflow discharges are 0.87, 3.98, 7.8 L·s-1, the interception rate of the herb VFS on Lambda-cyhalothrin are 61%, 50%, 33%, respectively, and the interception rate of the shrub-herb VFS on Lambda-cyhalothrin are 52%, 44%, 40%, respectively. The study evidenced that VFS can effectively intercept sediment and Lambda-cyhalothrin, which has better prevention effects on agricultural non-point source pollution. |
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