摘要
填海造陆区普遍存在次生盐渍化、地下结构物腐蚀等生态环境问题,尤其在中国北方沿海地区年蒸发量远大于降雨量的水循环条件下,此类问题更为突出。在简要回顾了填海现状和发展趋势的基础上,总结了填海后地下水系统和土体环境的演变趋势,并分析了造成上述影响的主要原因。通过对比湿润地区与半干旱地区的气候差异,认为利用集雨措施来引导自然淡化过程从而构建长效淋盐机制是半干旱填海区盐渍化防治的关键。同时指出,因地制宜地规划土体结构、提升排盐能力和种植绿化植物,是搭建和维持填海造陆区健康稳定生态系统的必要之举。
Secondary salinization and underground structures erosion usually occurs in reclaimed regions, especially in the climate conditions that annual evaporation is much larger than annual rainfall in north China. Based on a brief review of the status and trends of land reclamation, this paper summarized the evolution of groundwater system and soil environment, and analyzed the main reasons contributing to these problems. Comparison of the climate differences be- tween humid areas and semiarid areas, it was pointed out that the key to soil salinity control in the semiarid region was to guide the law of nature by utilizing rainwater and flood resources to build a long-term leaching mechanism. Mean-while, in order to rebuild and maintain a healthy and stable ecosystem in the reclaimed areas, it was critical to plan the structure of soil layers, enhance the salt leaching and plant the green vegetation according to the local conditions.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2013年第1期138-145,共8页
Advances in Water Science
基金
国家自然科学基金资助项目(51279022)
国家重点基础研究发展计划(973计划)资助项目(2013CB430403)~~
关键词
填海造陆
盐渍土
淋盐机制
防治对策
水环境演变
land reclamation
saline soil
leaching
prevention
water environment evolution
