A method to analyze ¡°source-sink¡± structure of non-point source pollution based on remote sensing technology
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- 作者：Mengzhen Jiang ; Haiying Chen ; Qinghui Chen
- 关键词：Remote sensing ; &ldquo ; Source&ndash ; sink&rdquo ; structure ; Grid Landscape Contrast Index
- 刊名：Environmental Pollution
- 出版年：2013
- 出版时间：November, 2013
- 年：2013
- 卷：182
- 期：Complete
- 页码：135-140
- 全文大小：1686 K
文摘
With the purpose of providing scientific basis for environmental planning about non-point source pollution prevention and control, and improving the pollution regulating efficiency, this paper established the Grid Landscape Contrast Index based on Location-weighted Landscape Contrast Index according to the ¡°source-sink¡± theory. The spatial distribution of non-point source pollution caused by Jiulongjiang Estuary could be worked out by utilizing high resolution remote sensing images. The results showed that, the area of ¡°source¡± of nitrogen and phosphorus in Jiulongjiang Estuary was 534.42?km2 in 2008, and the ¡°sink¡± was 172.06?km2. The ¡°source¡± of non-point source pollution was distributed mainly over Xiamen island, most of Haicang, east of Jiaomei and river bank of Gangwei and Shima; and the ¡°sink¡± was distributed over southwest of Xiamen island and west of Shima. Generally speaking, the intensity of ¡°source¡± gets weaker along with the distance from the seas boundary increase, while ¡°sink¡± gets stronger.