Study On Optimization Of Land Use Structure In Jiajiang County Based On Ecosystem Service Value

Land resources as an important part of the whole terrestrial ecological environment,which is irreplaceable to the regulation and support of the whole ecological environment.With the rapid development of the local economy and the implementation of the national two-party policy,the contradiction between land supply and demand is more prominent and unreasonable The development and utilization of land caused by the growing environmental problems,which has become the current and future long period of China's economic and social development in the unavoidable reality.Therefore,it is of great significance to optimize the unreasonable use of land resources.Jiajiang County is located in the southwest of Sichuan Province Leshan City,Leshan industrial county,tourism county.In recent years,with the rapid development of county economy,land development and utilization of the environmental problems arising from the objective existence.Taking jiajiang county as the research object,in the thorough analysis jiajiang county from 2006 to 2015 years,on the basis of land use dynamic change,based on the ecological service value theory,using the analysis software to calculate the specific area ecosystem service value.At the same time,on the basis of the corresponding target model was established,through the quantitative analysis of land use and the objective function of the specific internal relation,further points out the future need to pay attention to during the process of land development in the region,hoping to provide reference to jiajiang..The main conclusions are as follows:(1)Jiajiang County 9 years of land use change is obvious,the most obvious change is the cultivated land and urban and rural land,the average annual rate of change over 100ha.(2)Jiajiang County 9 years of land use change faster,dynamic degree is between-4.69%~3.54%.The most dramatic changes were grassland and transportation land,the dynamic attitude were-4.69%and 3.54%,grassland degradation and traffic construction is the objective cause of its dramatic changes.(3)The total land inflow and outflow of land use in Jiajiang County was 3974.39 ha in 9 years,and the land use types of land use types were relatively large.Land use change into and out of the main features of the performance of:arable land,forest land reduction,other agricultural land reduction,not folly utilized to increase the agricultural land to a large number of construction land,garden and other aspects.(4)Forest ecosystems and water ecosystems account for the value of ecosystem services in nine years.In the past nine years,the ecosystem ecosystems and water ecosystems accounted for the value of ecosystem services in the forest ecosystems,water resources,The total value of the ecosystem services accounted for more than 78%of the total value;9 years,Jiajiang County ecosystem services value changes year by year,from 2006 to 1,659,087,300 million reduced to 1,649,068,700 yuan in 2015,9 years slightly reduced Of 10,018,600 yuan,about an annual reduction of 1,001,900 yuan,the average annual reduction rate of 0.06%.The causes of this phenomenon is complex,the rapid development of the local population,local government policy guidance,the fast development of real estate industry and the natural disasters occurred frequently in recent years,and so on.,The total population increase,the policy reasons and the natural causes,among which the social and economic development,the total population increase and the natural reason is the main reason for the decrease of the total value of the ecosystem service.(5)Based on the optimization of the relationship model,the land use optimization scheme of Jiajiang County was constructed,and the optimization was put forward from the aspects of optimization of land structure,the optimization measures proposed to increase the land use sustainability from land structure.The optimization of land use in Jiajiang County after the ecosystem service value of 1 billion 668 million 434 thousand and 900 yuan,more than the total value of land ecosystem service in Jiajiang County in 2015(1 billion 649 million 68 thousand and 700 yuan),,and the value of Jiajiang County ecosystem was significantly increased after optimization.The optimized land use structure strengthens the protection of agricultural land,and greatly improves the economic benefit level of construction land,The economic development of jijiang county can be greatly promoted.