调水至巢湖稀释湖水营养状态及抑制蓝藻生长的遥感分析

Remote Sensing Analysis of Water Diversion to Dilute Nutritional Condition of Chaohu Lake and Inhibition of Blue-green Algae Growth

针对2009年巢湖生态调水试验期间及可比性较强的2008年同期遥感影像,采用叶绿素反演法将巢湖遥感影像上的不同颜色与湖水中的叶绿素浓度相联系,进而分析确定湖水中蓝藻(或营养化)生长和分布情况。结果表明,非调水期间,2009年巢湖蓝藻暴发水平高于2008年;调水后,富营养状态2009年低于2008年,中营养状态2009年高于2008年;调水改善了巢湖东半湖营养状态,同时明显抑制了东半湖的蓝藻生长。

By analyzing the images of remote sensing about the test period of ecological water diversion in Chaohu Lake in 2009 and 2008, the method of chlorophyll inversion is used to connect the different colors in the images of remote sensing of Chaohu Lake with the concentration of chlorophyll. And then, it analyzes the growth of blue-green algae or the eutrofication of the lake. The result shows that in 2009, before the water diversion, the level of the appearance of the blue-green algae is higher than in 2008; after the water diversion, the eutrophic state in 2009 is lower than in 2008, and the nutritional status of in 2009 is higher than in 2008. It proves that water diversion improves the nutritional condition of the east half lake and inhibits the growth of blue-green algae effectively.