基于ASTERGDEM数据的湖北省地形起伏度及其与人口和经济的关系研究

Relief Degree of Land Surface in Hubei Province Studied Based on ASTERGDEM Data and Its Correlations with Population Density and Economic Development

[目的]探讨湖北省地形起伏度及其与人口和经济的定量关系,为制定合理的人口经济政策、引导人口经济合理布局和治理生态环境等方面提供科学依据。[方法]采用邻域分析法、均值变点法等方法,确定湖北省地形起伏度最佳统计单元,根据分级标准绘制湖北省地形起伏度分级图,并分析地形起伏度对研究区人口和经济分布的影响。[结果]湖北省地势整体上以平原、丘陵为主,平原地貌类型主要分布在江汉平原,丘陵主要分布在黄冈北部、咸宁、黄石南部、鄂西北和鄂西南大部,两者占湖北省面积的70%。随着地形起伏度的增加,县域人口密度和经济密度逐渐降低,呈显著负相关,而且县域地形起伏度越小,人口密度和经济密度在垂直方向越分散。[结论]地形起伏度与县域人口密度和经济密度有负相关性,对区域人口和经济分布有一定的影响。

[Objective]To Investigate the relief degree of land surface in Hubei Province and illustrate its quantitative correlations with population and economy,in order to provide scientific grounds for the formulation of reasonable policy of population and economy,and the guidance of reasonable distribution of population and economy,as well as the governance of ecological environment.[Methods]The best statistical units for relief degree in Hubei Province were determined using neighborhood analysis,mean change point analysis.The relief degree classification map of Hubei Province was drawn according to the given classification criteria and the influence of relief degree on the distributions of population and economy were analyzed in the investigated region.[Results]The landform generally constituted by plains and hills in Hubei Province.Plains mainly distributed in Jianghan Plain,and the hills mainly distributed in Northern Huanggang,Xianning,Southern Huangshi,Northern Exi and most parts of Southern Exi.These two landforms cover70% of the total area of Hubei Province.With the increase of the relief degree of land surface,county population density and economic density was both gradually decreased.The smaller the relief degree of counties was,the more vertically scattered of population density and economic density.[Conclusion]There was a negative correlation between the relief degree and population density and economic density,and the relief degree of land surface has strong negative impacts on the distributions of population and economy.