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Topographical relief characteristics and its impact on population and economy:A case study of the mountainous area in western Henan,China

查看全文 作　　者：ZHANG [1]Jingjing;ZHU [1]Wenbo;ZHU [1]Lianqi;CUI [1]Yaoping;HE [1]Shasha;REN [1]Han 高影响力作者 机构地区：[1]College of Environment and Planning,Henan University,Kaifeng 475004,Henan,China高影响力机构 出　　处：《Journal of Geographical Sciences》索引2019年第29卷第4期,共15页高影响力期刊 基　　金：National Natural Science Foundation of China,No.41671090;National Basic Research Program(973 Program),No.2015CB452702. 摘　　要：Topographical relief is a key factor that limits population distribution and economic development in mountainous areas.The limitation is especially apparent in the mountain?plain t「ansition zone.Taking the transition zone between the Qinling Mountains and the North China Plain(i.e.the mountainous area in western Henan Province)as an example and based on the 200-m resolution DEM data,we used the mean change-point analysis to determine the optimal statistical unit for topographical relief,and thereafter extracted the relief degree.Taking the 1:100,000 land use data,township population and county-level industrial data,population and economic spatial models were constructed,and 200?m resolution grid population and economic density maps were gen erated.Afterwards,statistical analysis was carried out to quantitatively reveal the impact of topographical relief on population and economy.In addition,the impacts of other topographical factors were discussed.The results showed the following.(1)The relief degree in western Henan is generally low,where 58.6%of the regional topography does not exceed half the height of a reference mountain(relative elevation W250 m).Spatially,the relief degree is high in the west while low in the east,and high in the middle while low in the north and south.There is a positive correlation between relief degree and elevation,and a much stronger correlation between relief degree and slope.(2)The linear fitting degree between the population and economic validation data and the corresponding simulation data are 0.943 and 0.909,respectively,indicating that the spatialized results can reflect the actual population and economic distribution.(3)The impact of topographical relief on population and economy was stronger than that of other topographical factors.The relief degree showed a good logarithmic fit relati on ship with population density(0.911)and economic density(0.874).Specifically,88.65%of the population lives in areas where the topographical relief is W0.5 and 88.03%of the gross regional product was from areas where the relief is W0.3.Compared with the population distribution,the economic development showed an obvious agglomeration trend towards low relief areas. 关 键 词：topographical RELIEF POPULATION and ECONOMY land use SPATIALIZATION grid WESTERN HENAN mountainous area
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