Analysis of the Geomorphology and Environmental Geological Problems of Huzhou on the Yangtze River Delta

Geomorphically, Huzhou, which is on the Yangtze River delta is characterized mainly by plains, with small hills. This paper presents a detailed analysis of the environmental geological hazards both natural and those incurred by human activities in different morphologic units. The authors point out that most of the regional environmental geological problems in the natural geologic-morphologic conditions, such as crustal stability, foundation of soft soil, soil waterlogging and soil erosion, have insignificant effects to the society, or related countermeasures of prevention and control have been adopted. But environmental geological problems incurred by human being's economic activities become more and more severe, for example, water and soil pollution and land subsidence in plain areas resulting from overexploitation of groundwater, and landslides, karst collapses and water and soil loss etc. caused by quarrying in hilly areas.

长江三角洲地下水开采的负环境效应及其防治

长江三角洲位于以上海为中心的经济发达区，是我国经济实力最强、产业规模最大的地区。但是，随着经济的高速发展和人口的高度集中，也进一步加剧了对地下水的需求，使三角洲大部分地区普遍出现地下水位大幅下降，从而引起各种环境负效应，如地面沉降、地裂缝、地面塌陷、海水入侵和水质污染等，严重影响了长江三角洲经济可持续发展和人民群众生活质量的提高。本文对长江三角洲因地下水强烈开采而出现的一系列环境地质灾害进行了总结和讨论，并初步提出了有关防治对策和建议。