%0 Journal Article
%T Tempo-spatial Variation of Non-point Source Pollutants in a Complex Landscape<br>复杂景观中营养型非点源污染物时空变异特征分析
%A Chen Liding
%A Qiu Jun
%A Zhang Shurong
%A Fu Bojie
%A <br>陈利顶
%A 丘君
%A 张淑荣
%A 傅伯杰
%J 环境科学
%D 2003
%I 
%X The occurrence of non-point source pollution, is not only related to its sources, landscape pattern, but also dependents on the factors such as soil erosion, rainfall, irrigation, surface and underground run-off. Thus non-point source pollution is characterized by in nature tempo-spatial variation. In this paper, the tempo-spatial variation of non-point source pollution due to nutrient salts in a complex landscape was studied by field water sampling and analysis. The results were as follow: 1. Spatial variability of all nutrient concentration in rainfall-deficit year was generally smaller than that in normal rainfall year with different level for different pollutants in a single period. 2. Spatial variability of solid particles in surface water was much marked than the other pollutants studied both in the rainfall-deficit year and in the normal rainfall year, while the smaller variation in different water periods of a year in the normal rainfall year. 3. Apparently, those areas with stable run-off had a small seasonal variation of non-point source pollution. However, large seasonal change occurred mainly in the upper reach of river where run-off changed seasonally, and/or where farmland dominated, as well as where point-source pollution occurred.
%K non point source pollution
%K nutrient salt
%K tempo spatial variation
%K complex landscape<br>非点源污染
%K 营养盐污染物
%K 时空变异
%K 复杂景观
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=5EED7AA5E4CA7456&yid=D43C4A19B2EE3C0A&vid=B91E8C6D6FE990DB&iid=38B194292C032A66&sid=CD775AE9DDBD7B53&eid=869807E2D7BED9EC&journal_id=0250-3301&journal_name=环境科学&referenced_num=9&reference_num=20