Study On The Coupling And Coordination Of Land Use Change And Rural Development In Dabie Mountainous Area

Based on remote sensing data,this paper analyzes the spatiotemporal distribution characteristics of land use change in the Dabie Mountainous Area in 2000,2005,2010,2015 and 2020.At the same time,it constructs the evaluation index system of rural development in the Dabie Mountainous Area,studies the spatiotemporal distribution characteristics of rural development in the Dabie Mountainous Area,and constructs the coupling coordination degree model to explore the coupling coordination relationship between land use change and rural development.The results show that:(1)The main type of land use in the Dabie Mountainous Area is cultivated land,and the area of the seven types of land use is ranked from large to small as follows:cultivated land>forest>construction land>water area>grassland>bare land>shrub.In the past 20 years,the proportion of cultivated land,forest and construction land in the Dabie Mountainous Area has fluctuated greatly,while the rest of the land types are relatively stable.From the perspective of land use change,the land use change in the Dabie Mountainous Area is mainly reflected in the substantial reduction of cultivated land,the small reduction of shrubs,grasslands and bare land,and the increase of forests,water areas and construction land.The cultivated land area decreased by57.21km~2,mainly transferred out to forests,construction land and water areas;The forest area increased by 29.65km~2;The water area increased by 5.13km~2;The area of construction land increased by 24.66km~2 with the largest increase of 43.28%.The main contribution land is cultivated land.From the perspective of change range and dynamic degree,the land use types with large change range in the four periods from2000 to 2020 are the same,both of which are farmland and forest,and the change range increases first and then decreases;The average dynamic degree of land use change in the four periods was-3.309%,-1.334%,-3.746%and-2.435%respectively.From the perspective of land use degree,the overall land use degree of the Dabie Mountainous Area is at a medium level.The spatial difference of land use degree among counties and cities is large,and the time change is not obvious.(2)The rural development level of the counties and cities in the Dabie Mountainous Area has a large gap,with a small vertical fluctuation.The minimum value is 0.167 in 2015,and the maximum value is 0.747 in 2000.Both the minimum value and the maximum value fluctuate,with the maximum value showing a trend of decreasing first and then increasing.The gap between counties and cities in rural development in the Dabie Mountainous Area has been very large,and the development level of counties and cities is relatively average,without obvious progress or regression.From the perspective of spatial distribution,the high value area of the rural comprehensive development index has gradually shifted from the southwest to the north.The rural comprehensive development index of Hubei Province has a gradual downward trend,while Henan Province has a gradual upward trend,while Anhui Province has a small change.(3)From the perspective of time series,the coupling coordination degree of land use degree and rural development in the Dabie Mountainous Area fluctuates greatly,and the regional differences are large.The high value areas of coupling coordination mainly include Huaibin County,Macheng City,Xiaochang County,etc.,while the low value areas mainly include Jinzhai County and Yuexi County;There is a"low low"moderate coordination level between the two systems of land use and rural comprehensive development,which is mainly reflected in the low level of coordination in the Dabie Mountainous Area.The range of land use change is small,the growth of construction land is not obvious,and the change range of rural comprehensive development index is also small.From 2000 to 2020,the overall level of the coupling and coordination changes in the Dabie Mountainous Area was stable,and 29.17%of the coupling and coordination degree of counties and cities changed to a higher level.From the perspective of spatial distribution characteristics,the coupling coordination level of the Dabie Mountainous Area is dominated by moderate coordination and low coordination,and most of them are distributed in the plain areas of Hubei Province and Anhui Province,with the Dabie Mountainous Area as the center and radiating around.