川西北生态示范区的县城空间扩展特征及规划引导*
Spatial Expansion Characteristics and Planning Guidance of Counties in Northwest Sichuan Ecological Demonstration Area
赵 炜
四川大学建筑与环境学院 教授，博士生导师
杨 铭
四川新中城城市规划设计有限公司 高级工程师，硕士
王超深（通信作者）
四川大学建筑与环境学院 高级工程师，博士
李 渊
西南交通大学建筑与设计学院 硕士
摘要: 县城空间扩展与生态约束博弈下的“点群式”矛盾已逐步成为制约川西北生态示范区良性发展的关键，具体表现在：县城空间周围的景观生态格局遭受破坏，面临的地质灾害威胁加剧；县城空间陷入“轴向式”扩展与“高地侵蚀式”扩展的两难问题；县城空间扩展过程呈现出高度的“自发性”与“无序性”。从川西北特殊的地域环境入手，将县城空间扩展类型划分为高原平坝型、山地宽谷型和山地峡谷型，并从规模、形态、布局等维度定量测度其空间扩展特征，揭示了上述核心问题产生的历史原因和现实规律。基于市县级国土空间规划的技术路径，在双评价、用地指标分配、城镇开发边界划定等方面提出优化思考，有助于为市县级国土空间规划在川西北生态示范区的适应性实践提供理论参考。
Abstract: The contradiction between the spatial expansion of the county towns and the ecological constraints has gradually become the key to restrict the healthy development of the Ecological Demonstration Area in Northwest Sichuan. Specifically, it includes three aspects: (1) The destruction of the landscape ecological pattern around the county towns and the intensified threat of geological disasters; (2) The county towns space fall into the dilemma of "axial" expansion and "highland erosion" expansion; (3) The process of spatial expansion of the county towns show a high degree of "spontaneity" and "disorder". Starting from the special regional environment of Northwest Sichuan, the spatial expansion types of county towns are divided into three types: towns on the plateau, mountainous wide valley county towns, and mountainous gorge county towns. The spatial expansion characteristics are quantitatively measured from the dimensions of scale, shape and layout, and the historical causes and practical laws of the above core problems are revealed. Based on the technical path of city and county-level territory spatial planning, this paper puts forward the optimization thinking in the aspects of "double evaluation", land use index allocation and urban development boundary delimitation, which is helpful to provide theoretical reference for the adaptive practice of city and county-level land space planning in Northwest Sichuan Ecological Demonstration Area.
关键词：川西北生态示范区；县城空间扩展模式；适应性优化；国土空间规划
Keyword: the Ecological Demonstration Area in Northwest Sichuan; the spatial expansion mode of the county; adaptive optimization; territory spatial planning
中图分类号：TU984
文献标识码: A
资金资助
国家重点研发计划项目子项目 “多灾种灾变空间耦合下的应急疏散空间韧性规划技术与示范” 2020YFD1100702-5
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