摘要：Lakefront wetland in Dongting Lake has been faced high variations during recent decades. Therefore, there has a strong need to investigate and understand the Lakefront wetland changes in Dongting Lake. In this paper, we selected Landsat image to study the Lakefront wetland in Dongting Lake in dry season from 1979 to 2016. Lakefront wetland information was classified tofour categories: grassland, mud flat, waterbody and others. On this basis, we obtained the lakefront wetland distribution map of Dongting Lake by using maximum likelihood method. The results showed that from 1979 to 1995, lakefront wetland area in Dongting Lake decreased continuously. Among them, lakefront wetland area decreased by 170.4km2 from 1979 to 1987, in which lakefront wetland m ainly transferred to waterbody, in the area of 161.85 km2. From 1987 to 1995, lake- front wetland area decreased by 282.3 km2, in which lakefront wetland area m ainly transferred to other land cover types, w ith a transfer of 507.32 km2. From 1995 to 2016, land wetland wetland area continued to increase, especially from 2005 to 2016, w ith an increase of 698.4 km2, m ainly in transfer of other land cover types to lakefront wetlands, transferring 588.65 km2. Based on lakefront wetland area change study, in this paper, we further analyzed the impact of temperature, rainfall, and water level on change of lakefront wetland in Dongting Lake and its correlation. Water level and rainfall are negatively correlated w ith lakefront wetland area, and the correlation between temperature and lakefront wetland area is not obvious.
