Characteristic Analysis Of Land Use/cover Change Of Bortala And Jing River

this paper based on landscape pattern of land use/land cover data of the BortalaRiver and Jinghe River Basin in different periods and Preliminary Study thespace-time dynamic change mechanism of landscape pattern of land use in the studyarea, using3S technology as a data processing and analyzing platform, analysis theland use and landscape pattern within the22years and reveal the time-space changesin the study area by qualitative, quantitative analysis. Draw the following conclusion:From the land use/land cover aspects:(1) between the years of1990～1999thechange rate of urban-rural land and cultivated land area are becoming fast, especiallythe urban-rural land increased with high speed, between1999～2007the land use ofurban-rural and cultivated land still increased, water and saline land reduced withsignificant speed, from2007～2011the speed rate of urban-rural area declined from10.52%in1990~1999to2.46%,3time periods within1990~2011the integrateddynamic degree were1.03%、0.93%、1.42%.(2) in the study area the urban-rural landand farmland showed strong positive correlation, water area and unused land showedstrong positive correlation, unused land and grass land showed positive correlation，urban-rural land strongly negative correlated with water area、unused land and grassland, cultivated land strongly negative correlated with grass land.(3) the urban-ruralland mainly converted to unused land and cultivated land, unused land and saline landmainly converted to water area, the cultivated land grass land and saline land transferunused land significantly, the cultivated land mainly converted unused land and grassland, the grassland mainly converted to water area and unused area, saline landmainly converted to water area and unused land.From the landscape pattern aspect:(1) from1990to2011, the patch numberof urban-rural land basically maintained4, patch density basically remainedunchanged in0.006State, the largest patch index has shown a growth trend, patchshape index changes unsteadily. Patch Number in water area decreased rapidly, patchdensity index also decreased, the largest patch index showed a decreasing trend after1999, between1990~2007patch shape index showed a decreasing trend, after2007began to increase. Unused land from1999began to decline, patch density indexmaintained declining trend, the largest patch index began to decrease after1999, patchshape index reduce rapidly from1990to2007.patch number of Farm land Maintainedgrowing trend between1990and2007, the patch density varies with the changing ofpatch number, and the largest patch index showed growing trend, patch shape index changes unsteadily. Patch number of grass land showed declining trend, patch densitydecreased since1999, the largest patch index changes unsteadily, patch shape indexalways maintained declining trend. The patch number of saline land from1999maintained downward trend, the patch number and patch density changecorrespondingly, the largest patch index began to rise after2007, patch shape indexdecreased since1999.(2)From the index level landscape pattern within22years，wecan conclude that, patch number showed decreasing trend, patch density indexdecreased with the patch number, the largest patch index began to decrease after2007,patch shape index showed a downward trend, Shannon diversity index showeddeclining trend, diversity index declined from1999, Shannon evenness indexmaintained declining trend.