摘要
为了正确地认识不同尺度的农业非点源污染现象的特征 ,寻找不同尺度之间的联系规律 ,从流域的尺度效应、流域相似性以及流域的空间单元划分等方面进行了研究 ,提出一套兼顾尺度效应的以等级系统为基础的流域单元划分方法 ,同时以辽西下河套小流域为例 ,进行了具体的应用 ,进一步充实了农业非点源污染研究的方法论。
Non-point source pollution (NPS) from agriculture has been regarded as a complicated environmental problem. And one of its essential characteristics is spatial variability. In order to describe the characteristics and inherent relation, respectively at different scales, the present paper illustrated the effects, similarity and spatial unit division at watershed level, and developed a method for plotting watershed unit which is based on hierarchical system and took account of the scale effects. In taking Xiahetao watershed as a model, it has been indicated that the procedure could strengthen the methodology of non-point source pollution from agriculture.
出处
《农业环境保护》
CSCD
北大核心
2001年第1期34-37,共4页
Agro-Environmental Protection
关键词
农业
非点源污染
尺度效应
相似性
流域单元划分
non-point pollution
watershed
scale effects
similarity
watershed unit division
