Evaluation Of Land Ecological Vulnerability Difference In The Yarkant River Basin

China covers the largest ecologically fragile area in the world and basically covers the types of ecological fragility around the world.It is the country with the most significant ecological environmental vulnerability.The key areas of land ecological fragility in China are mainly distributed in the northern arid area,part of the Yangtze River Basin and the Qinghai-Tibet Plateau.Among them,the ecological vulnerability of the land in the Yangtze River Basin is the most representative of the characteristics of the northern arid area.As the fourth largest irrigation area in China,the Yangtze River Basin has a complex hydrological and geological environment that fully covers all types of natural fragile conditions in China,and the socioeconomic development model tends to The basic level can characterize China’s special land ecological fragile environment,and the socio-economic level of the Yangtze River Basin is relatively backward compared to other regions,making the region gradually become a gray area in the ecological environment supervision area.It can be seen from this that the main reason for the differences in social and economic development in various regions is the obvious temporal and spatial differences in the ecological vulnerability of land in various regions,which is the main bottleneck for the overall development of human society.Carrying out research on the assessment of land ecological vulnerability in Xinjiang’s arid inland river basin,tracing the problems that caused the difference in the performance of land ecological vulnerability,and then divided and governed the regions with different degrees of vulnerability based on influencing factors,while theoretically providing ecological supervision of watersheds in various regions Corresponding guidance can provide scientific basis for comprehensive regulation and control of river basin ecosystems,rational use of resources and optimal allocation,which can guide people on how to make better use of water resources,and at the same time increase national recognition of national governance systems such as the construction of a new ecological civilization and satisfy At present,the people are in urgent need of a beautiful ecological environment.This article takes the Yangtze River Basin as the research area,evaluates the ecological vulnerability of the land in the research area based on the human-land relationship system theory,landscape ecology principles,ecological carrying theory and barrel theory,and analyzes the fourth period of 2008-2018 with the help of the SRP evaluation model The spatial and temporal difference of land ecological vulnerability changes to identify the driving factors that lead to the rise of the land ecological vulnerability index of the Yangtze River Basin,and on this basis,corresponding risk management and control measures are proposed for different vulnerability levels of the river basin.The main conclusions are as follows:In terms of spatial distribution,the Yangtze River Basin is dominated by light and light fragile areas,accounting for 35.67%and 33.63%of the area respectively,mainly distributed in the alluvial fan plains in the middle and lower reaches of the Yangtze River;the moderate and severe fragile areas are followed by the second The ratios are 14.89%and 12.93%,which are mainly distributed in the mountainous and hilly areas of the upper reaches of the Yangtze River;the area of the extremely fragile area accounts for the smallest,only 2.89%,but the area is also 3,000 square kilometers,mainly distributed in the densely populated areas of the middle and lower reaches of the Yangtze River,The overall ecological environment plays a "barrel effect".The ecological environment in some areas continues to deteriorate,resulting in a balance between the overall ecological pressure of the river basin and the ecological " threshold”.In terms of time distribution,the overall evaluation index decreased by 0.04324 from 2008 to 2011,the overall evaluation index decreased by 0.00541 from 2011 to 2014,and the overall evaluation index decreased by 0.05686 from 2014 to 2018.Although the land ecological fragility index decreased in various stages and the overall ecological environment of the river basin showed an improvement trend,the medium,heavy,and extremely fragile areas are still widely distributed.The four aspects of the project proposed specific control measures.