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作 者 ：陈利顶,傅伯杰,张淑荣,丘君,郭旭东,杨福林

期 刊 ：生态学报 2002年 22卷 6期 页码：808~816

关键词：异质景观；景观格局；非点源污染；源汇景观；

Keywords:nonpoint-source pollution, “source” and “sink” landscape, nitrogen concentration, heterogeneous landscape, landscape pattern,

摘 要 ：通过在河北省遵化地区于桥水库的上游选取景观特征差异明显的 4个典型流域 ,对地表水体采样分析 ,研究了非点源污染 N(水溶性 N)含量的季节动态变化特征以及与流域形状、景观空间分布格局的相互关系。结果表明 :1平水 (偏干 ,下同 )年份不同季节地表水中非点源污染 N含量高于干旱年份 ,反映出平水年份地表和地下径流对非点源污染的形成起到了较大作用。2干旱年份地表水中非点源污染 N含量季节变化比较平稳 ,且空间变异较小。而平水年份地表水体中非点源污染 N含量季节变化较大 ,表现出两种不同变化形式。 3流域形状和景观类型的相对重要性与非点源污染 N之间没有明显的相关关系 ,而“源”“汇”景观类型的空间分布格局在非点源污染的形成中起着重要作用。

Abstract:With point-source pollution controlled effectively, nonpoint-source pollution, especially that resulting from agricultural land, has become the main factor affecting surface water quality. Much attention has been paid to the impact of fertilizer and pesticide application, wastewater irrigation, and land management on pollutant transport. However, landscape pattern also plays an important role in pollutant transport and detention. Landscapes may be classified into two types: “source” and “sink” landscapes, b...

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