丹江口库区水域面积动态变化分析——基于长时间序列Landsat数据

Dynamic Analysis of Water Area in Danjiangkou Reservoir—Based on Long-time Series Landsat data

丹江口水库是南水北调中线工程水源地，库区水域面积的变化监测对库区生态环境建设和南水北调工程都具有重要的意义。该研究以1993~2013年的Landsat多源多时相遥感数据为基础，利用修正的归一化水体指数（MNDWI）模型对丹江口库区过去20年的水域面积进行动态监测。结果表明：库区最小面积为292.34 km2，最大面积为506.64 km2，多年平均面积为367.56 km2。研究成果能为丹江口水库库情监测、水资源调度和南水北调管理提供科学的决策依据。

Danjiangkou Reservoir is the freshwater source of the Middle Route of the South-to-North Water Diversion Project （MRSNWDP） in China. Monitoring the surface water area change of Danjiangkou Reservoir is of great significance to ecological environment construction and MRSNWDP. Based on Landsat remote sensing images from 1993 to 2013 ,dynamic monitoring on water area of Danjiangkou Reservoir in the past 20 years was carried out by using the MNDWI model. Research results showed that the minimum and maximum areas of Danjiangkou Reservoir were 292.3# and 506.64 km2, respectively ; and the perennial average area was 367.56 km2. This research provides scientific base for the decision making of reservoir situation monitoring,water resources scheduling and SNWDP project in Danjiangkou Reservoir.