| 广佛区域土地利用结构对非点源污染的影响 |
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| 引用本文： | 帅红,夏北成.广佛区域土地利用结构对非点源污染的影响[J].热带地理,2006,26(3):229-233. |
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| 作者姓名： | 帅红 夏北成 |
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| 作者单位： | 1. 湖南师范大学,资源环境学院,长沙,410081
2. 中山大学,环境科学与工程学院,广州,510275 |
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| 摘 要： | 在野外布点采样的基础上分析了非点源污染评价指标,同时,利用G IS技术研究广佛区域内不同土地利用结构与非点源污染之间的关系。结果表明,在以单一土地利用类型为主控制的单元中,由林地和基水地控制的地表水水质明显优于以耕地或城镇、农村居民点为主的单元;在不同的土地利用类型的组合结构中,各项污染物浓度往往介于林地、基水地或耕地为主控制的研究单元之间;在其他条件相似时,随着研究单元内林地和基水地的增加,非点源污染降低,而随着耕地或城镇、农村居民点比例的升高,非点源污染有逐渐增大的趋势。此外,土地利用结构对非点源污染的影响不仅表现在数量结构上,同时表现在空间分布上。
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| 关 键 词： | 土地利用结构 非点源污染 GIS |
| 文章编号： | 1001-5221（2006）03-0229-05 |
| 收稿时间： | 2005-12-07 |
| 修稿时间： | 2006-04-05 |
Effects of Land Use Structure on Non-Point Source Pollution in the Areas of Guangzhou-Foshan |
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| SHUAI Hong,XIA Bei-cheng.Effects of Land Use Structure on Non-Point Source Pollution in the Areas of Guangzhou-Foshan[J].Tropical Geography,2006,26(3):229-233. |
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| Authors: | SHUAI Hong XIA Bei-cheng |
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| Institution: | College of Resource and Environment, Hunan Normal University, Changsha 410081, China; 2. The Environmental Science and Engineering College of Sun Yat-Sen University, Guangzhou 510275, China |
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| Abstract: | As point source pollution has been effectively controlled,non-point source pollution,especially that of agriculture,will become the main factor affecting the surface water quality.On the basis of field sampling and analysis,by using GIS techniques,the relationship between land use structure and surface water quality in the area of Guangzhou-Foshan is investigated in this paper.The results show that:1)The surface water quality in the watersheds which are controlled mainly by woodland or dike-pond systems is distinctly better than that in those controlled by farmland or village residential area.2) In the watersheds controlled by combined structure of different land use types,the concentration of pollutants is at the middle level as compared with that of woodland,dike-pond area,farmland,and village residential area.3) When other conditions are similar, the concentration of non-point source pollution decreases with the increase of the area of woodland and dike-ponds,while that increases with the increase of the area of farmland and villages.Effects of land use structure on non-point source pollution are also reflected on the spatial distribution of the pollutants.Nitrogen mainly spreads in Fangcun District and adjacents,and Phosphorus mainly in Pingzhou,Sanshan,Lishui and Huangqi towns. |
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| Keywords: | Land use structure Non-point source pollution GIS |
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