title: A method to analyze "source-sink" structure of non-point source pollution based on remote sensing technology.
abstract: 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 km(2) in 2008, and the "sink" was 172.06 km(2). 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.
authors.affiliation: Third Institute of Oceanography, State Oceanic Administration, No. 178 Daxue Road, Xiamen 361005, China. Electronic address: mengzhenj@gmail.com.
authors.forename: Mengzhen
authors.initials: M
authors.lastname: Jiang
authors.forename: Haiying
authors.initials: H
authors.lastname: Chen
authors.forename: Qinghui
authors.initials: Q
authors.lastname: Chen
mesh_terms: D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D004787:Environmental Pollution / Q000706:statistics & numerical data; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D058998:Remote Sensing Technology
chemical_list: D004785:Environmental Pollutants; D010758:Phosphorus; D009584:Nitrogen
keywords: Grid Landscape Contrast Index; Remote sensing; “Source–sink” structure