西南典型城市环境地质问题与城市规划

西南地区的昆明、重庆和成都分属高原湖畔城市、沿江山区城市和平原城市,地质环境各异。20世纪80年代以来,伴随城市的发展,均不同程度地出现了与城市可持续发展密切相关的环境地质问题。昆明面临的是地面沉降和软弱地基问题,频繁的崩塌和滑坡地质灾害制约了重庆的发展与扩展,而位于川西平原地下水库上的成都的高速发展已使岷江巨型冲洪积扇地下水系统的完整性及径流交替能力受到严重破坏。环境地质问题应成为城市规划首先考虑的最基本因素,制定合理的规划方案及针对性条款是遏制地质环境恶化的有效途径。

Environmental geological issues of typical cities in southwest China and city planning

Kunming, Chongqing and Chengdu in southwest China are a lakeside city in the Yunnan-Guizhou Plateau, a mountain city beside a river and a plain city respectively and have different geological environments. Many environmental geological issues closely related to the sustainable development of cities have occurred to different extent in these cities with their fast development from the 1980s. Kunming is confronted with land subsidence and soft ground. Frequent landslide and rockfall events have obstructed Chongqing's development and expansion. The integrity and runoff ability of the groundwater system in the giant diluvial-alluvial fan of the Minjiang River have been seriously destructed by the rapid development of Chengdu located above a ground reservoir of the western Sichuan plain. Environmental geological issues should be the most important factors considered in city planning and drafting a rational city-planning scheme is the effective approach to inhibiting the deterioration of the geological environment.