Jiang Mengzhen, Chen Haiying, Chen Qinghui, Wu Haiyan
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
Mar Pollut Bull. 2014 Oct 15;87(1-2):88-97. doi: 10.1016/j.marpolbul.2014.08.008. Epub 2014 Aug 22.
Appropriate increases in the "sink" of a landscape can reduce the risk of non-point source pollution (NPSP) to the sea at relatively lower costs and at a higher efficiency. Based on high-resolution remote sensing image data taken between 2003 and 2008, we analyzed the "source" and "sink" landscape pattern variations of nitrogen and phosphorus pollutants in the Jiulongjiang estuary region. The contribution to the sea and distribution of each pollutant in the region was calculated using the LCI and mGLCI models. The results indicated that an increased amount of pollutants was contributed to the sea, and the "source" area of the nitrogen NPSP in the study area increased by 32.75 km(2). We also propose a landscape pattern optimization to reduce pollution in the Jiulongjiang estuary in 2008 through the conversion of cultivated land with slopes greater than 15° and paddy fields near rivers, and an increase in mangrove areas.
适当增加景观的“汇”，可以以相对较低的成本和较高的效率降低面源污染（NPSP）入海的风险。基于2003年至2008年期间的高分辨率遥感影像数据，我们分析了九龙江河口地区氮、磷污染物的“源”“汇”景观格局变化。利用LCI和mGLCI模型计算了该地区各污染物对海洋的贡献量及其分布。结果表明，入海污染物量增加，研究区域内氮面源污染的“源”面积增加了32.75平方公里。我们还提出了一种景观格局优化方案，通过将坡度大于15°的耕地和河流附近的稻田进行转换，并增加红树林面积，来减少2008年九龙江河口的污染。
