植被过滤带对泥沙和磷削减效率及VFSMOD-W模型模拟  

The Retention Efficiencies of Vegetative Filter Strips on Sediment and Phosphorus:Experiments and VFSMOD-W Modeling

作　　者：李冉 郭益铭[2] 刘文文 LI Ran;GUO Yiming;LIU Wenwen(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Environmental Studies,China University of Geosciences,Wuhan 430074,China;School of Water Resources&Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]中国地质大学(武汉)环境学院,湖北武汉430074 [3]东华理工大学水资源与环境工程学院,江西南昌330013

出　　处：《环境科学与技术》2023年第3期116-124,共9页Environmental Science & Technology

基　　金：国家自然科学基金(41877534);东华理工大学科研基金(自然科学类)(DHBK2019111)。

摘　　要：植被过滤带是有效削减面源污染的生态管理措施,其削减效果受很多因素的影响。该文通过植被过滤带试验,探讨不同坡度和浅层地下水埋深对植被过滤带削减地表径流、泥沙和磷的影响,结合VFSMOD-W模型和简单磷运移经验模型评估污染物在植被过滤带的传输。结果表明,植被过滤带对地表径流、泥沙和TP的削减效率范围分别为25%~72%、43%~82%和39%~80%。在同一浅层地下水埋深条件下,当过滤带坡度分别为2%、5%和15%时,坡度越缓,植被过滤带削减效率越高。在同一坡度条件下,当浅层地下水埋深分别为0.08、0.22和0.36 m时,浅层地下水埋深越深,植被过滤带的削减效率越高。VFSMOD-W模型模拟结果显示,该模型能够较好地模拟地表径流和泥沙在植被过滤带的传输。VFSMOD-W模型结合简单磷运移经验模型对削减效果进行模拟评估,发现整体拟合效果较好(C_(eff)>0.85)。VFSMOD-W能较好地用于预测地表径流、泥沙和磷在植被过滤带的传输。The vegetation filter strips(VFS)is an effective ecological management practice to control the non-point source pollution,the retention efficiencies of which is related to various factors.In this research,through the controlled flume experiments,we studied the retention efficiencies of surface runoff,sediment,and phosphorus in VFS under the various slopes and shallow groundwater depths.Results showed that the retention efficiencies varied greatly from 25%~72%,43%~82%,39%~80%for surface runoff,sediment,and phosphorus,respectively.At the same shallow groundwater depth,when the slope is 2%,5%and 15%,respectively,the slower the slope,the higher the retention efficiency of VFS is.At the same slope,when the shallow groundwater depth is 0.08 m,0.22 m and 0.36 m,respectively,the deeper the groundwater depth,the higher the retention efficiency of VFS is.The simulation results of VFSMOD-W model showed that the VFSMOD-W model performed fairly well in predicting the surface runoff and sediment transport in VFS.The VFSMOD-W model was combined with simple phosphorus transport empirical model to simulate and evaluate the reduction efficiency,which resulted in good predictions(C_(eff)>0.85).The results indicated that VFSMOD-W model can be used to predict surface runoff,sediment and phosphorus transport in VFS.

关 键 词：植被过滤带 坡度 浅层地下水埋深 削减效率 VFSMOD-W模型 

分 类 号：X52[环境科学与工程—环境工程] X71