Comparison of Land Use Patterns in Xiliang Lake in 1990 and 2010
Combining with the field survey results,the comparison of land use patterns in Xiliang Lake in 1990 and 2010 had been explored by the maximum-likelihood method,using remote sensing images from Landsat TM in 1990 and 2010.There were 6 types of land use:waters,forest land,marsh,paddy field,dry land and construction land.The matrix for land use change was obtained by ArcGIS software.The results showed compared with those in 1990,the area of waters was decreased by 2 822.71 hm2 in 2010,the one of dry land was decreased by 378.51 hm2,the ones of paddy field and forest land were decreased by 28.46 hm2 and 25.74 hm2,the one of marshes increased by 3 240.4 hm2,the one of construction land increased by 15.02 hm2 in 2010.Quite a lot of waters turned into marshes,which reflected the marshy tendency of Xiliang Lake.The disturbance of human activities included illegal embankment around the lake,the over-development of fence culture,harvesting water grass,dragging for mussels and discharging pollutants.The natural succession of the plants could be the main natural factor,which led to the degeneration of Xiliang Lake.
NETL
NSTL
万方数据
维普
