The Spatial Distribution Pattern Analysis of Population in Loess Plateau Region Based on Nature Suitability for Human Settlement
选取地形、土地覆盖、灾害、气候和水文五个因子构建人居环境指数模型，评价黄土高原自然适宜性，并分析人口密度与适宜性的空间关联，发现人口分布从东南向西北递减、与适宜性显著相关。
For the necessity of natural environment evaluation of human settlements,by choosing terrain,land cover,disasters,climates and water condition as the evaluation factors,based on Geographic Information System technique,this paper sets up the human settlements environment index(HEI) model and evaluates the natural environment suitability of human settlements in Loess Plateau with it.Under this foundation,this paper analysis the spatial distribution pattern of Population in Loess Plateau.The results show that:(1)The HEI in Loess Plateau Region presents the symmetric distribution gradually decreased from inside to outside in general and the high level in HEI surrounded pattern by the city for stronghold.(2) The distribution of population density in Loess Plateau Region presents the decrease of the trend from southeast to northwest in general and from urban area to outside in local.With HEI suitability cutting,the population density decreased.The correlation between population density and HEI is significant.(3) The area allocation of HEI in Loess Plateau Region is relatively balanced,and population distribution is relatively concentrated.Compared with pattern in 2000,the spatial distribution pattern is unbalanced and unbalanced coefficient increases gradually.