遥感技术在漫湾库区周边植被覆盖宏观监测中的应用研究

Study on Application of Remote Sensing Monitoring Vegetation Cover Around the Manwan Hydropower Station

在对云南澜沧江中下游地区进行梯级电站群开发利用中 ,针对大型水利、水电工程建设 ,超前关注并及时开展有关陆地表层环境要素的山地植被演变动态及环境效应 ,是关系地方社会经济可持续发展与人类生存环境的紧迫问题。选取澜沧江上已建成的第一座大型水电站——漫湾电站为案例 ,通过对该电站库区及周边遥感图像的技术处理 ,获得对库区周边山地植被覆盖状况的宏观、快速监测。解决了常规方法在澜沧江梯级电站群峡谷山区植被覆盖调查中客观存在的困难 ,弥补目前在该区开展的有关大坝安全研究中 ,对周边库区周边地表环境生态安全研究上的不足 ,为澜沧江上已建、在建和拟建的其它多个大型水利水电工程生态环境监测提供案例研究。

With the exploitation of the natural resources in Lancang River basin, multi rundle hydropower stations have been programmed to establish in this mountain canyon area. It is urgent to pay a special attention on the condition of the land cover, especially for vegetation plant cover in this mountain area. The state will close be related with the sustainable development of the local social, economic, and environment in this mountain area. In this study, we selected Manwan hydropower stations as typical research case, which is the first one of developed multi rundle hydropower stations in Lancang River basin. This power station has been completed in 1996. The mountain vegetation cover condition around the hydropower station has monitored by use of remote sensing technique. We map and analyse the construction of the mountain vegetation covers around Manwan hydropower stations. The result show that the mountain vegetation covers in this area is normal and better than the before the power is established. The application of monitoring by remote sensing technique used in this study solved the survey difficult of the environment factors in this mountain area. It also offsets the lack of factors on environment security. It provides a typical case study for other hydropower stations in another area in Yunnan province.