Study On The Transformation Of Land Use And Its Ecological Environment Effect In Kaidu-Kongque River Basin

The research on the transformation of land use and its eco-environmental effects in arid areas is of practical significance to the eco-environmental protection,the optimal allocation of land resources,and the sustainable and efficient utilization of the region.Therefore,based on the theoretical framework of human land relationship coordination theory,land sustainable use theory,ecological economics theory and system theory,this paper analyzes the ecological environmental effects of the Kaikong river basin before and after the land use transformation in 1990-2015,which provides a certain reference for the sustainable use of land resources in arid areas.Based on the remote sensing interpretation data of land use in 1990,2000,2010 and 2015 in Kaidu-Kongque River Basin,this paper classifies the land use types into cultivated land,forest land,grassland,construction land,water area,wetland,saline alkali land,desert and unused land,and classifies the nine land use types according to the leading function of "production ecology life" land use Through the methods of single land use dynamic degree,land use transfer matrix,regional eco-environment quality index,and ecological contribution rate of land use transformation,this paper quantitatively analyzes the land use transformation in Kaikong River Basin.The results show that:(1)the change of land use quantity and changes in the number of land function types:from 1990 to 2015,the area of different land use types in Kaikong River Basin showed a trend of "four increase and five decrease",that is,the area of cultivated land,wetland,desert and construction land increased,while the area of grassland,forest land,unused land,water area and saline alkali land decreased;From 1990 to 2015,the land functional use types of Kaikong River Basin were:pasture ecological land>other ecological land>agricultural production land>forest land ecological land>water ecological land>urban and rural living land.(2)Transfer of land use function type:during 1990-2015,the land use transformation based on "three living land" in the Kaikong River Basin showed rapid increase of production land and living land,rapid decrease of ecological land;transfer in area of agricultural production land,other ecological land and urban and rural living land was larger than net transfer out area,grassland ecological land,forest ecological land and water area The transfer out area of ecological land is larger than the net transfer out area.(3)The ecological contribution rate of regional ecological environment index and land use function transformation:from 1990 to 2000,the ecological environment quality index of Kaikong River Basin decreased from 0.4654 to 0.4539,from 2010 to 2015,it increased to 0.4559,and the ecological environment quality maintained a relative balance;from 1990 to 2015,the ecological environment of Kaikong River Basin as a whole had two trends of improvement and deterioration,From 1990 to 2000,the deterioration trend of ecological environment quality in the study area was greater than the improvement trend;from 2000 to 2010,the improvement trend of ecological environment.