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不同土地类型下重金属随暴雨径流迁移过程及速率对比
引用本文:梁涛,王浩,张秀梅,章申,于兴修.不同土地类型下重金属随暴雨径流迁移过程及速率对比[J].应用生态学报,2003,14(10):1756-1760.
作者姓名:梁涛  王浩  张秀梅  章申  于兴修
作者单位:1. 中国科学院地理科学与资源研究所,北京,100101
2. 北京师范大学环境科学研究所,北京,100875
3. 中国科学院南京地理与湖泊研究所,南京210008
基金项目:中国科学院知识创新工程项目(KZCX2-310-04-01,KZCX3-SW-429),国家重点基础研究发展规划资助项目(G1999045710)
摘    要:选择太湖上游西苕溪流域最具代表性的5种土地类型,利用野外人工降雨装置,研究了不同形态重金属(Cu,Cr,Pb,Zn)随暴雨径流水相及沉积物相的迁移过程,对比了流域内不同土地利用/土地覆被条件下重金属的迁移特征,并估算了流失速率。结果表明,在相同的降雨条件下,桑林Cu、Zn和Pb随地表径流水相的迁移量最大。分别达0.21、0.45和0.15mg·m-2·min-1;水田Cr迁移量最大,达0.06mg·m-2·min-1;松林重金属迁移量都很小,而且重金属随地表径流水相的迁移主要是通过悬浮细颗粒态。地表径流沉积物相的重金属流失量远高于水相。水相迁移速率仅占沉积物相迁移率的0.1%~4.9%;从地表径流水相重金属迁移量占沉积物相迁移量的比例来看,Cu较高,Cr、Pb、Zn较低。

关 键 词:土地利用类型  暴雨径流  重金属流失  人工降雨
文章编号:1001-9332(2003)10-1756-05
修稿时间:2002年5月29日

Transportation processes and rates of heavy metals in an artificial rainstorm runoff under different land use types
LIANG Tao,WANG Hao,ZHANG Xiumei,ZHANG Shen,YU Kngxiu.Transportation processes and rates of heavy metals in an artificial rainstorm runoff under different land use types[J].Chinese Journal of Applied Ecology,2003,14(10):1756-1760.
Authors:LIANG Tao  WANG Hao  ZHANG Xiumei  ZHANG Shen  YU Kngxiu
Institution:Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. Liangt@igsnrr.ac.cn
Abstract:Studies on the transportation and flux of various kinds of heavy metals in runoff and sediment of five typical landuse types in West Tiaoxi catchment showed that the losses of Cu (0.21 mg.m-2.min-1), Zn (0.45 mg.m-2.min-1), and Pb (0.15 mg.m-2.min-1) in mulberry and that of Cr (0.06 mg.m-2.min-1) in paddy field were larger in surface runoff, while their losses in pinery were very small. Suspended thin particles played the main role on transporting heavy metals in surface runoff under all kinds of land uses. The losses from runoff were much lower than that from sediment, which only occupied 0.1%-4.9%, and the loss rate of Cu from runoff and sediment was higher than that of Cr, Pb and Zn.
Keywords:Land use type  Surface runoff  Heavy metals  Artificial rainstorm  
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