近40年来芜申运河西段湖泊群面积变化分析

Analysis of Acreage Changes of Lakes in Western Section of Wushen Canal in Past 40 Years

采用1973～2016年的Landsat影像数据对芜申运河西段湖泊群面积进行解译,分析了该区的水域变化趋势。结果表明:1973年10月研究区湖泊群水域面积高达576.5 km^2; 1973～1979年水域面积在600～300 km^2间逐年降低; 1979～1990年水域面积在500～300 km^2间小幅波动下降; 1990年以前水域面积变化主要受围湖筑圩控制; 1990年以后水域面积趋于平稳,其变化主要受降水等非人为因素的影响。

By adopting the Landsat image data from 1973 to 2016,this paper interpreted the acreage of lakes in the western section of the Wushen Canal,and analyzed the change trend of water area in this studied district.The results showed that:the acreage of lakes in the western section of the Wushen Canal was as high as 576.5 km^2 in October,1973;the water area in this district decreased gradually from 600 km^2 to 300 km^2 during 1973~1979;the water area dynamically reduced within 500~300 km^2 during 1979~1990;the change in acreage of lakes was mainly controlled by the human activities before 1990;since 1990,the water area became stabilized and was closely related to non-artificial factors such as rainfall.