文献类型：会议论文

英文题名：Study on the Dynamic Monitoring and Succession Analysis of Wetland Types in Dongting Lake Area

作者：Zhang Huaiqing[1] Zhu Xiaorong[1]

第一作者：张怀清

通信作者：Zhang, HQ[1]

机构：[1]Chinese Acad Forestry, Res Inst Resource Informat Tech, Beijing, Peoples R China

会议论文集：2nd IEEE International Conference on Computer Science and Information Technology

会议日期：AUG 08-11, 2009

会议地点：Beijing, PEOPLES R CHINA

语种：英文

外文关键词：Dongting Lake; Wetland; Remote sensing monitoring; Returning Farmland to Lake

年份：2009

摘要：In this paper, three period times (1987, 1996, 2004) of Landsat TM remote sensing images data are chosen to monitor the main wetland types changes in Dongting Lake area. According to the main wetland types distribute in Dongting Lake area, a classification system of wetland types is build at first. Then the software of Erdas Images and Fragstats are used to process remote sensing images and statistical analysis. After comparison of landuse types, landscape pattern indices and transfer matrixes among three period times, the result is that the area of the wetland types decreased heavily, especially mudflat and paddy field from 1987 to 1996 because of the history "reclaiming the land from the lake", but some wetland types change and trend presented a turning point around 1996, which effected by the national policy of "returning farmland to lake" launched in 1998. From 1987 to 1996, the main succession of wetland in Dongting Lake was lake water -> mudflat -> sedge land -> reed flat -> forest. However, from 1996 to 2004, the natural wetland types presented the change in jumps from other various wetland types directly to forest land. The major factors influencing the wetland changes in Dongting Lake are human activities, sediment accumulation and local policies etc. Among them, the implementation of "returning land to the lake" has relieved the shrink of lake and promotes the renewal of natural wetland to a certain extent.