基于RS、GIS技术的扎龙沼泽湿地景观格局变化分析

本文以1986年、1999年、2002年的扎龙区域Landsat TM影像为数据源，利用RS、GIS技术分析了扎龙地区沼泽湿地16年的空间格局变化。选取景观破碎化指数、分形维数、分布质心等景观指数进行计算分析，同时研究了不同地区中沼泽湿地面积相对于总的沼泽湿地面积的变化情况。结果表明扎龙区域沼泽湿地的破碎化程度在加深，斑块形状变化不大，其质心位置向西北偏移，西北部的沼泽湿地不如东南部稳定，受到的人为影响更大。

Study on Changes of Marsh Landscape Pattern in Zhalong Wetland Assisted by RS and GIS

A wetland is a structural and functional unit of a landscape consisting of various environments and sustaining a certain biodiversity. Conservation of wetlands is important at both the regional and the national level. The paper elucidated the changes in marsh spatial pattern during a period of about 16 years after 1986 in the Zhalong wetland. Three Landsat TM remote sensing images in 1986, 1999 and 2002 were used to analyze the evolution of Zhalong marsh pattern assisted by GIS and RS technology. The landscape indices such as fragment index, fractal dimension, distribution centroid points, etc were calculated and analyzed. At the same time the paper studied the changes of marsh area in each district relative to the changes of the whole marsh area. The results show that the fragmentation of wetland patches is increasing, the shape of marsh patches changes little, the distribution centroid moved towards northwest and that marsh in Zhalong northwest is by human actions than that in Zhalong southeast. points of marsh wetland has less stable and affected more