黄土高原沟壑区小城镇空间形态优化研究

【摘　要】在黄土高原沟壑地区，受到特殊自然环境和特定城市发展阶段的影响，城市空间扩展存在很大的被动性，一般沿川道伸展成为狭长的带形。文章以子长县城为研究对象，在分析当前县城带状空间形态的主要问题及未来发展诉求的基础上，对县城及其周边进行大面积、全覆盖的用地分析与选择，最终确定了未来城市空间拓展的环状布局形态。文章认为这样的形态并不是一种简单的形式，它能够缓解和规避带状形态在资源消耗、社会经济和环境效益上的局限性，同时最大限度地使得城市与自然环境融为一体。
[关键词]黄土高原沟壑区；城市形态；带状布局；环状布局；子长县城
[文章编号]1006-0022(2016)03-0114-06　[中图分类号]TU984　[文献标识码]B

Optimization Of Urban Spatial Form Of Small Towns In Gullied Loess Plateau/Huang Minghua, Wang Tian, Zhu Yanan
[Abstract] Influenced by the special natural environment and the development stage of a particular city, urban space in gullied loess plateau expands quite passively and generally stretches along the gully and valley land to become narrow zonal shape. Taking Zichang County as the research object and basing on the main problems of zonal spatial form and the future development demands, the paper analyzes and chooses the area fully covering the whole county, and finally determines the circular layout form for the future urban space expansion. The paper believes that such form is not a kind of simple form. It can alleviate and avoid the limitations of zonal cities in resource consumption, social economy and environmental benefits, and combine city with nature to the fullest extent.
[Key words] Gullied loess plateau, Urban form, Zonal layout, Circular layout, Zichang county

1黄土高原沟壑区小城镇空间发展问题

      黄土高原位于我国西北地区东北部，沟壑纵横、水土流失严重，城镇发展受到地形条件限制，大多只能沿川道延伸，形成了千篇一律的狭长带状形态。近年来，黄土高原的一些城镇在当地能源产业迅猛发展和快速城镇化的带动下，城市用地的扩展面临着严峻的挑战。