摘要
基于重庆市南川区 DEM ,采用窗口分析和 ARCGIS 空间分析模块中的邻域分析,提取了南川区地形起伏度,从海拔高度、平地比例和面积比例方面分析了南川区地形起伏度的空间分布特征,并利用回归分析法对南川区各乡镇平均人口密度与平均地形起伏度的相关关系进行了分析.最后,对南川区人居环境地形适宜性做出了评价和分级.研究表明:①南川区的地形起伏度介于0.35~2.84之间,地形起伏度小于2的区域占总面积的94.45%,其中平地比例占总体的98.7%;②南川区地形起伏度呈现由东南向西北递减的空间特征,高值区主要分布在大娄山地区,低值区主要分布在川东平行岭谷区等地;③南川区各乡镇平均人口密度与平均地形起伏度存在一定的负相关关系,南川区人居环境地形适宜程度整体表现为由西北向东南递减的态势.
Based on the digital elevation model (DEM ) of Nanchuan district of Chongqing municipality ,u-sing the window analysis and neighbor analysis of Arcgis software ,this paper extracts the relief degree of land surface (RDLS) of Nanchuan .From the aspects of altitude ,flat proportion and area proportion ,the spatial distribution features of its RDLS are analyzed ,and regression analysis is used to investigate the rel-evance between the average RDLS and the average population density of villages and towns of Nanchuan . Finally ,the environmental suitability for human settlements is evaluated and graded based on the terrain of Nanchuan .The study shows that RDLS in Nanchuan varies between 0.35 and 2.84 ,and 94.45% of the total area has an RDLS less than 2 ,accounting for 98.7% of the total .The RDLS in Nanchuan presents such a spatial pattern that the southeast is higher and the northwest is lower ,and the Dalou mountains have the maximum value and the eastern Sichuan parallel Range-Gorge Region the minimum value .There is some negative relevance between the average population density and the average relief degree of land sur-face of villages and towns in Nanchuan ,and the environmental suitability for human settlements in Nan-chuan shows a descending trend from the northwest to the southeast .
出处
《西南大学学报(自然科学版)》
CAS
CSCD
北大核心
2014年第10期150-156,共7页
Journal of Southwest University(Natural Science Edition)
基金
"十二五"农村领域国家科技计划项目(2012BAJ23B00)
关键词
数字高程模型
地形起伏度
人口密度
南川区
digital elevation model (DEM)
the relief degree of land surface (RDLS)
population density
Nanchuan