| 基于GIS/RS的不同土地利用类型重金属面源污染比较 |
| |
| 引用本文： | 张天蛟,刘 刚,王圣伟.基于GIS/RS的不同土地利用类型重金属面源污染比较[J].农业机械学报,2014,45(S1):124-132. |
| |
| 作者姓名： | 张天蛟 刘 刚 王圣伟 |
| |
| 作者单位： | 中国农业大学;中国农业大学;中国农业大学 |
| |
| 基金项目： | 高等学校博士学科点专项科研基金资助项目(20120008110033) |
| |
| 摘 要： | 针对不同土地利用类型，采样测定土壤重金属质量比背景值；基于DEM数据和遥感影像数据，结合空间信息技术（GIS/RS），利用RUSLE模型和SCS-CN模型分别核算流域内不同土地利用类型的土壤流失量和地表径流量，在验证模型准确性的基础上，估算重金属非点源污染负荷。研究结果表明：研究区域不同土地利用类型的重金属质量比背景值差异较大，重金属Cu和Pb在工矿用地、草地和住宅用地的背景值较高，在有林地的背景值较低。综合估算随2种主要迁移途径输出的重金属面源污染负荷，重金属Cu总污染负荷量大约为651913kg/a，重金属Pb总污染负荷量大约为268004kg/a。不同土地利用类型中，随土壤侵蚀输出的重金属污染负荷，以疏林地和草地的贡献率最大，有林地和水浇地最小；随地表径流输出的重金属污染负荷，以草地和疏林地的贡献率最大，有林地和旱地最小。
|
| 关 键 词： | 重金属 面源污染 污染负荷 地表径流 土壤侵蚀 |
| 收稿时间： | 2014/6/29 0:00:00 |
Estimation of Heavy Metal Pollution Loads from Non-point Sources Based on GIS/RS |
| |
| Zhang Tianjiao,Liu Gang and Wang Shengwei.Estimation of Heavy Metal Pollution Loads from Non-point Sources Based on GIS/RS[J].Transactions of the Chinese Society of Agricultural Machinery,2014,45(S1):124-132. |
| |
| Authors: | Zhang Tianjiao Liu Gang and Wang Shengwei |
| |
| Institution: | China Agricultural University;China Agricultural University;China Agricultural University |
| |
| Abstract: | Heavy metal pollution caused enormous risks to human health and ecosystem. In this paper, soil heavy metal concentration was determined through sampling from different land use types in the watershed of Binzhou. With DEM data and remote sensing image, the main routes of pollution from non-point sources, i.e., surface runoff and soil erosion of different land use types were estimated based on SCS-CN model and RUSLE model. The precision of the model was validated and analyzed and heavy metal copper (Cu), lead (Pb) pollution loads from non-point sources in the watershed of Yellow River were estimated. The results showed that big differences exited among the soil heavy metal concentration background values from different land use types in the study area: in industrial land, mining land and grassland, the background value of Cu and Pb was high; in woodland, the value was low. The total loads of Cu and Pb was about 651913kg/a and 268004kg/a. The variation ranges of heavy metal pollution loads from soil erosion were large as well: the values in sparse woodland and grassland were the highest; in woodland and irrigable land were the lowest. The value of heavy metal pollution loads from surface runoff also differed greatly: the value in grassland and sparse woodland was much higher than in woodland and dry land. The research could be used for further analyzing the characteristics of the transfer of heavy metals, studying the heavy metal loads from non point source, and adjusting the land use structure reasonably. |
| |
| Keywords: | Heavy metal Non point sources pollution Pollution load Surface runoff Soil erosion |
|
| 点击此处可从《农业机械学报》浏览原始摘要信息 |
| 点击此处可从《农业机械学报》下载免费的PDF全文 |
