利用TM图像提取玛纳斯河流域上游积雪信息的方法研究

在我国干旱地区,天山是融水占年径流量比重较大的山区,在天山地区,冰雪为许多河流和生态环境的生存发展提供水资源,所以对冰雪的定量监测非常重要。通过对TM图像云和雪的光谱特征分析以及几种常用积雪信息提取方法的比较,以及对玛纳斯河流域上游地区的积雪进行实际检测,认为雪盖指数法是TM图像提取积雪的较佳技术手段。 

Study on the Methods of Snow Information Extraction in Upstream of the Manas River Basin Based on TM Image

Melting water accounts fro a large proportion in the Tianshan Mountains, where snow and ice provide water resource for many rivers and the ecological environment in the arid areas, so, quantitative monitoring of snow and ice is very important.Based on the spectral characteristics analysis of clouds and snow, the comparison of several common methods of snow information extraction and the actual detection of snow on the upstream of the Manas River, it proves that the method of NDSI is a better technical method than any other method on the use of TM image emtracting snow.