SALTWATER INTRUSION THROUGH SALT-FRESHWATER INTERFACE IN MUDDY COAST
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摘要: 咸淡水界面运动机理是当今国际海岸带水文地质学的热点问题。泥质海岸带中古环境变化(历次海侵)构成了现代咸水入侵发生的背景;围填海等人类工程加剧了现代咸水入侵进程;过量开采地下水(卤水)引起地下水位下降,含水层中淡水水头低于附近咸水水头,破坏淡水与海水之间的水动力平衡是造成咸水入侵的内在原因。综述了海岸带地区咸水入侵研究程度及进展,分析并掌握咸淡水界面运动机理对于泥质海岸水文环境保护和生态修复有重要的意义。Abstract: The mechanism of saltwater intrusion through the salt-fresh water interface in a muddy coast is a hotspot of current coastal hydrogeological studies. The frequent shifting of palaeo-environments in the muddy coast caused by transgressions is the background of modern saltwater intrusion. Human activities, such as coastal land reclamation, have accelerated the process of modern saltwater invasion. The excessive exploitation of groundwater or brine water will certainly destroy the existing hydraulic balance. And as the result, saltwater will invade through the salt-fresh water interface, driven by the difference of the lower freshwater head and the higher saltwater head. The research progress of seawater intrusion through saltwater-freshwater interface in a clayey silt coast was summarized in this paper. Based on the review, we suggest that the study on the mechanism of saltwater intrusion through salt-fresh water interface be strengthened, and suitable measures be taken to protect and/or restore the hydrogeological environments in muddy coastal areas.
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Key words:
- seawater intrusion /
- salt-freshwater interface /
- muddy coast
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