葉爾羌河流域中下游地區(qū)土地利用變化分析.pdf

1、新疆師范大學碩士學位論文葉爾羌河流域中下游地區(qū)土地利用變化分析姓名：王芳申請學位級別：碩士專業(yè)：自然地理學指導教師：海鷹2010-05-30Ⅱ Abstract Land use is changed by the influences of natural factor and social factor of humanity.Land use change is one of the main reasons of global

2、environment change.Yarkant River Basin lies in southwest of Xinjiang,which the ecological environment deteriorated because of excessive human productive activity.Therefore a series of issues have appeared such as decreas

3、e of water in middle and lower reaches,forest degradation,and soil salinization and so on.At the same time,great changes of land use have taken place in study area.The study on the land use change in middle and lower rea

4、ches of Yarkant River Basin have important significance to enhance the prctection of soil resource in this area,prevent the unreasonable develop and use activity,improve ecological environment. This thesis supported by s

5、patial analysis method of geographic information system(GIS) and statistical method,use of TM of 1990、1999 and 2008 in Yarkant River Basin.Analysis on land use transition change,land use change range,land ues change degr

6、ee,land use change tendency,the main factors and so on.The conclusions are attained as following: (1)Ayalysis on land use change process The main change of land use occourred in farmland,grassland,forest,residential land

7、,wetland and salinate fileds.From 1990 to 1999,the area of grassland to farmland is 104080hm2, the area of farmland to other forest is 10621hm2, the area of forest to farmland is 5017hm2, the area of sandland to farmland

8、 is 4129hm2 the area of farmand to residential is 1292hm2 and so on;from 1999 to 2008, the area of grassland to farmland is 73423hm2, the area of farmland to other forest is 14303hm2, the area of forest to farmland is 10

9、038hm2, the area of sandland to salinate fileds is 1225hm2, the area of farmland to residential is 1611hm2. (2) Ayalysis on land use change tendency From the features of the range、speed of the area`s land use quantity ,r

10、evealed the tendency of its land use.farmland、other forest、 、bottomaind、residential are all increased,and forest 、 shurbland 、 high coverage grassland 、 middle coverage grassland、low coverage grassland、river、sandland、swa

11、mp are all decreased. (3) Ayalysis on the main factor of land use change Based on the analysis on land use change process and tendency in study area,analysis on the main factor in land use change from natural factor,popu