洞庭湖生态经济区土地功能评价与影响因素分析

Evaluation of Land Function and Analysis of Influencing Factors in Dongting Lake Eco-economic Zone

以洞庭湖生态经济区25个县(市、区)为研究地域单元,构建土地功能评价指标体系,测算洞庭湖生态经济区2018年土地功能值,分析其地域分异特征,运用地理探测器中的因子探测模型分析土地功能影响因素。结果表明:(1)洞庭湖生态经济区土地功能在各县(市、区)之间存在较为显著的差异,地势平坦的湖区地带土地生产功能较强,社会功能与生产功能在空间分布上存在一定的空间耦合性,生态功能较强区域沿洞庭湖流域呈带状分布。(2)自然区位条件是影响土地功能地域分异的基础性因素,社会经济水平是影响土地功能地域分异的决定性因素,区域环境状况是影响土地功能地域分异的关键因素,在各因素类型中对土地功能影响最大的因子分别是地均固定资产投资、距地级市中心距离和水土流失治理面积。

Taking 25 counties(cities,districts)of the Dongting Lake Eco-economic Zone as the research area units,we constructed the land function evaluation index system,calculated the land function value of the Dongting Lake Eco-economic Zone in 2018,analyzed its spatial differentiation characteristics,and used the factor detection model of geographical detector to analyze the influencing factors of land function.The results show that the land function of the Dongting Lake Eco-economic Zone has significant differences among counties(cities,districts).The flat lake area has a strong land production function,and the social function and production function exist certain spatial coupling in the spatial distribution.Strong ecological functions are distributed along the Dongting Lake basin.Natural location conditions are the basic factors that affect the regional differentiation of land functions.The socio-economic level is the decisive factor that affects the regional differentiation of land functions.Regional environmental condition is the key factor that affects the regional differentiation of land functions.Among the factors,the greatest impact factors on land functions are fixed asset investment per land,distance from the city-level city center,and soil erosion control area.