Study On The Appraisal Of Land Ecological Security In City Cluster On The Northern Slopes Of Tianshan Mountain

Land resources are not the only one crucial basis for the public’s manufacture and livelihood,but also the premise for the society and economy to be continue.As people gradually increase the use of soil,a series of changes have occurred in land use/cover,forcing the land ecological environment to be in an extremely severe state.City cluster are a space conveyor for the country to promote rapid economic expansion.The extremely rapid rise in the number of city population and the enhancing exposition of building land,besides the illogical use of soil,have led to more distinct environmental problems in city,and land ecological security is facing Serious burden.In this paper,the oasis city group in northest aris area the city cluster on the northern hill of Tianshan mountains as the object of study.According to the LUCC data of 2000,2010 and 2018,from the ange of natural ecoenvironment,linked with feature of “mountain-oasis-desert”in the research.The valuation system of land security is established by selecting five aspects of land ecological system status,quality,landscape structure,functional value and elasticity.The consequence show that:(1)From 2000 to 2018,with the advancement of urbanization,the index of land use degree increased from 157.68 in 2000 to 160.98 in 2018,and the dynamic attitude of land use increased from 0.107 in 2000-2010 to 0.111 in 2010-2018,figuring that the stike of humankind activities on field change is enhancing.In2018,unused land and grassland have large portion of the research,the one have 53.97%,the other one are30.46%.From the angle of time change,arable land and building land raise rapidly,and the share of watershed grew slowly.(2)From 2000 to 2018,the main transfer method was grassland to arable land and building land.It shows that the land use structure should be further revised and adjusted in the future,and the arable land and building land should be boosted logically and orderly manner.In the spatial change of land use,the arable land area of Shawan County,Karamay City and Wusu City changed greatly,and the buildng land of Kuitun City,Shihezi City,wujiaqu City and Urumqi City changed the most.In wujiaqu city,Kuitun City and Shihezi City,the share of building land and agricultural land is relatively large,and the unused land is very few.The remaining 12 counties and cities have the largest share of agricultural land,followed by unused land and the smallest share of construction land.(3)From 2000 to 2018,the land ecological security in the research area is generally at a perilous level.Specifically,the present and quality layers of land ecosystem are at a dangerous level,the landscape structure layer of land ecosystem is at a sensitive level,the functional layer of land ecosystem is at a sensitive level,and the resilience layer of land ecosystem is at a safe level.(4)Based on the results,proper measure and recommendations should be put in.The following proposal and counterplan should be taken in the future development of the research area.Firstly,We will optimize the structure of land use and promote the intensive use of land resources.Secondly,Improve the quality and stability of land ecosystem.Thirdly,It is necessary to arrange the landscape pattern reasonably and construct the ecological security pattern.Next,Maintain the resilience of land ecosystems.Finally,We will grasp the development orientation of cities and promote ecological progress in city clusters.