基于“塬-沟”相间地貌景观的城镇空间分布特征、形成机制和发展模式研究——以泾河流域为例

Research on Characteristics of Urban Spatial Distribution,Forming Mechanism and Development Model of the Loess Plateau Based on "Plateau-ditch" Landscape

文章首先从水系和黄土塬之间的关系角度对黄土高原"塬-沟"相间的独特地貌景观进行了量化分析。水系级别越高,且相邻水系级别相差越小,则其所切割的黄土塬则越大。其次,将黄土塬和城镇数据叠加,得出黄土塬城镇的空间分布特征,塬面面积越大分布城镇越多,城镇级别越高;中游区的城镇密度最大;下游区分布的城镇数量多。第三,从地形地貌、自然要素、水土流失和经济发展四个方面分析了黄土塬城镇空间分布的形成机制。最后,提出"沟壑生态保护+塬面生态控制+沟道水系生态廊道网络"的塬面城镇发展模式。

Firstly, the paper analyzes the unique landscape of the plateau - ditch in the Loess Plateau by the relationship between the water system and the loess plateau.The higher the water tevel is, and the smaller between the water level and the adjacent water level is, the larger the loess plateau is.Secondly, we superimpose the loess plateau boundary and urban data and get the spatial distribution characteristics of the loess plateau town. There are more towns located in the larger area of the loess plateau, and the higher the urban level is. Town density is the largest in the midstream area of the plateau.The largest urban scale is in the midstream area of the plateau, the largest urban number is in the downstream area of the plateau. Thirdly, the paper analyzes the formation mechanism of the spatial distribution of the cities and towns in the Loess Plateau from the four aspects of topography, natural factors, soil erosion and economic development. Finally, the paper puts forward the development model of the urban development of the ridge ecological protection ＋ ecological control of the plateau and the channel of ecological channel of channel system.