3种草皮缓冲带对农田径流污染物的净化效果及其最佳宽度研究.pdfVIP

　3 3 种草皮缓冲带对农田径流污染物的 净化效果及其最佳宽度研究＊ 黄沈发　唐　浩　鄢忠纯　熊丽君　吴建强 (, 200233) 　　　, 、3 。, SS , SS , 84%, , SS 81%、73%;T N 10 m g/L, 3 T N 2 mg/L, 《》(GB 3838—2002)Ⅴ;T P 0.54 ～ 1.50 mg/L , 3 TP 0.08 ～0.34 mg/L, GB 3838—2002Ⅴ;3 SS , SS 80%, 3 16.1～20.4 m, , 16.1 m。 　　　　　　 Sward riparian buffer zone for runoff cl arifi cation and nutrient removal　H uang S henf a, Tang Hao, Yan Zhongchun, X iong L ij un, Wu J ianqiang .(Shanghai Academy of Environmental S cience, Shanghai 200233) Abstract:　Field test data collected o er the 6-month period in 2006 were employ ed to compare the effecti eness of three sward riparian buffer zones for reduction of runoff SS and remo al of nutrients in the leachate and to estimate the buffer zone width for achie ing 80%SS reduction (optimal w idth).The control sy stemof bare riparian zone w as ineffecti e for SS reduction w hile the three sw ard buffer zones achie ed an a erage SS remo al of 80%;Cy nodon dacty lon was the best responsible for 84%SS reduction, followed by Trif olium re ens and Festuca arundinacea for SS reductions of 81%and 73%, respecti ely .When the influent T N w as10 mg/L, the effluent T N concentrations of leachate samples from the four test zones were all2 mg/L, the limit of Grade Ⅴof Surf ace Water Environmen- ta l Quality Standards (Chinese EPA, 2002);when the influent TP concentration was 0.54-1.50 mg/L, the effluent TP concentrations w ere 0.08-0.34 mg/L, below the limit of Grade Ⅴof surface w ater.The data suggest that a 16.1- 20.4 m sw ard buffer zone w ould be optimal and that Cynodon dacty lon w ould produce the best clarification result. Keywords:　sw ard buffer;non-point pollution;optimal width;Shanghai 　　, :, ; 。 , ; ,、 ,。 ,, 　　, , , 、3 [1,2] 。, , [3-7] 、 。 ,