大连市土地利用结构空间分异研究

Study on regional difference of land use structure in Dalian based on quantitative geography model

以2009年大连市第二次调查数据为基础,运用计量地理模型的方法和GIS软件,从土地利用多样化、集中度、信息熵、组合类型等方面,分析大连市10个区市县土地利用结构的空间分异.结果表明:大连市土地利用多样性特征明显,但空间差异性不大,大连市土地利用多样化指数达到0.787,接近理论最大值0.857,除3个建成区外,其他地区土地利用多样化指数均大于0.7;土地利用结构区域变化规律表现出以沙河口区为中心向东北和西南两个方向,土地利用多样化指数和信息熵值递增,土地利用集中化指数递减,土地利用组合类型由单一走向多样化的规律;土地利用结构呈现南部以城镇村及工矿用地为主,北部以耕地、林地为主的空间格局.

Based on the data of the Second National Census in Dalian in 2009,this paper studied 10 countries in Dalian city to analyze the spatial variation of land use using the ArcGIS analysis tools and the quantitative geography models from four aspects,which are diversification of land use,concentration ratio,Shannon entropy and composite type.The results showed as follows：（1）The diversity land use in Dalian city is 0.787,which is obvious and almost closes to the theoretical maximum,0.857,but the spatial difference between counties is small.（2）The diversity index and the information index of land use are increasing progressively from the center of Shahekou district to the northeast and southwest,whereas,the land use concentration index is decreasing.and the composite type of land use are gradually changing from sinagle to diversification.（3）In the southern of Dalian,the primary land use type is urban and industrial land;In the northern,the primary land use type is farmland and forestland.