Study On The Optimal Allocation Of Land Use Structure In Tieli City Based On The Value Of Ecosystem Services

Land resources are an important part of the ecosystem,human survival and development are inseparable from it.Rationally optimize and adjust land use structure,it can coordinate the relationship between regional social development and the ecological environment.In this study,based on remote sensing images and land use data of Tieli city in 1996,2006 and 2016,discussed the changes and factors of land use structure in Tieli city,and through the comparative analysis of the land use characteristics of the city in different research periods and townships.Based on this,combining the theory of ecological service value,conducting analysis and evaluation of the value of ecosystem services in Tieli city.Based on this,establishing the corresponding optimization model,then optimize the future land use structure of Tieli city,and advise on issues that need attention during the land development process,provide reference for the future development.In this study,main conclusions are drawn as follows:(1)The main land type of Tieli city is forest land,due to its large proportion in the whole,the overall change was relatively stable during the 1996-2016 study period.Increased area of cultivated land,garden land and construction land during the period;forest land,grassland,waters and unused land area decrease year by year.But the overall degree of land use in Tieli city is not high and Less dynamic change,in two study periods,In 1996-2006,the degree of change in forest land,cultivated land and garden land was larger than that in 2006-2016,grassland,waters,construction land and unused land are less changed.Large change in cultivated land and overall is increasing,cultivated land changes to a greater extent,and its overall situation is rising,The overall proportion increased by 2.38% from 1996-2016,the total area increased by 18334.71 hm2.Due to the impact of protection policies,the changes have been slow in recent years.The reduction of forest area is more obvious,the overall proportion decreased by 2.95% from 1996-2016,the total reduction of 16755.65 hm2.The garden increased the area by 247.36hm2 during the study period,grassland and unused land area are decreasing,During the study period,the area of grassland reduction was 2295.39 hm2,and the area of unused land was 65.41 hm2.Calculation of information entropy of land use structure in Tieli city,showing a trend of increasing year by year.Among them,the growth rate in 1996-2006 was larger than that in 2006-2016,it shows that the stability and order of land use structure in Teli city declined during the study period,but the decline has been relatively stable in recent years.In the study of various towns and villages,the information entropy value of Langxiang town is smaller than other regions,which shows that it is optimal in the land use structure of all towns and towns in Tieli city.(2)During the period 1996-2016,The value of ecosystem services in Tieli city is gradually decreasing,with a total reduction of 548 million yuan and the proportion decreased by 2%.From the perspective of land type,the reduction of forest land is an important factor leading to the decline of total value,the value of change in value during the study period is the highest,and it is also the most ecologically active land type.Langxiang town which has the widest distribution in the woodland,provides the highest ecological benefits for the whole.The main function type that provides the value of ecosystem services for Tieli city is the regulation of gas,water and soil,which accounts for a large proportion of the overall value.(3)Establish a linear programming function to optimize the land use structure of Tieli city,determine reasonable constraints and maximize the value of ecosystem services.After calculation,the optimization plan is obtained,and the plan is adjusted according to the actual situation in the local area.Increased area of forest land,garden land and construction land in the study area after optimization,and the forest land increased more;cultivated land and water area remain unchanged;grassland and unused land area decreased.After optimization,the value of ecosystem services in Tieli city increased by 11.7843 million yuan,suppresses the trend of decreasing value and improves overall ecological functionality.