Third Institute of Oceanography, State Oceanic Administration, No. 178 Daxue Road, Xiamen 361005, China.
Environ Pollut. 2013 Nov;182:135-40. doi: 10.1016/j.envpol.2013.07.006. Epub 2013 Jul 31.
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.
为了为非点源污染防治的环境规划提供科学依据，并提高污染治理效率，本文根据“源-汇”理论，建立了基于位置加权景观对比指数的网格景观对比指数。利用高分辨率遥感影像，可以计算出九龙江口非点源污染的空间分布。结果表明，2008 年九龙江口氮、磷的“源”区面积为 534.42km2，“汇”区面积为 172.06km2。非点源污染的“源”主要分布在厦门岛、海沧大部分地区、集美东部和港尾、石码；“汇”则分布在厦门岛西南部和石码西部。总的来说，“源”的强度随着与海界距离的增加而减弱，而“汇”则增强。
