基于环境一号卫星的东洞庭湖富营养化评价

The Evaluation of the Eutrophication of Lake East Dongting with the Satellite HJ-1

水体富营养化现象是一个世界性的水污染治理难题。洞庭湖是我国第二大淡水湖,其富营养化问题也慢慢变成一个阻碍当地经济发展的瓶颈。保护洞庭湖湿地生态环境,控制湖水富营养化,是洞庭湖区环境治理的首要任务。本文利用遥感技术,对环境一号卫星CCD遥感数据进行了处理,并从处理后的遥感图像中识别了2009年6月~10月东洞庭湖水体富营养化状况,并与实测数据计算综合营养状况指数对识别的结果进行对比,结果表明对遥感图像进行识别的结论与实地测量的情况基本一致,证明了环境一号卫星数据在湖泊水质遥感监测中的适用性。通过对东洞庭湖水质作出全面评价,为洞庭湖的水体生态环境保护提供了重要的理论基础。

Eutrophication has become a tough problem in the area of water pollution control all over the world. Lake east Dongting is the second fi-eshwater lake in China. the eutrophication of which is becoming a development bottleneck restricting the local economy. Protecting the water environment in the Lake East Dongting wetland and preventing and controlling its eutrophication have become a top priority. The purpose of this paper is to identity the eutrophication status of lake east Dongting based on the satellite H J-1 images. In order to exanaine the identification, this paper calculated the comprehensive trophic level index on the basis of measured data of Lake East Dongting. The test showed that identification of the eutrophication status based on the satellite HJ-I images accords with the actual situation. The important theoretical basis about ecological environment protection of the lake east Dongting was provided through the comprehensive evaluation of its water quality,