摘要
宁夏南部地区是中国严重缺水地区之一,该地区地下水类型可分为松散岩类孔隙水、碎屑岩类裂隙—孔隙水、基岩裂隙水和碳酸盐类岩溶水。受到当地特殊的气候条件、地貌特征、地层岩性和地质构造的影响,各类地下水水质普遍比较差。含水介质中大量的石膏、芒硝等矿物成分进入地下水中是水质恶劣的根本原因;封闭的蓄水构造使得当地地下水循环不畅,蒸发浓缩作用使得浅层水中聚集高盐分,也是水质变差的重要原因。
The southern Ningxia Automous Region is one of the most arid areas in China, the groundwater in this area can be classified into four types. （1） pore water in loose rocks, （2） fissure-pore water in elastic rocks, （3） fissure water in bedrocks and （4） karstic water in carbonate rocks. Being influenced by the special climate, physiognomy, lithology and geological structure, the quality of all these types of groundwater are considerably bad. It is the fundamentally reason for the bad groundwater quality that great amounts of gypsum, mirabilite and other minerals are dissolved into the groundwater; those are the other two reason that the groundwater flows sluggish induced by the obturated water reserving structure, and the salt concentration is high in shallow groundwater resulted from the evaporation.
出处
《地质论评》
CAS
CSCD
北大核心
2006年第6期810-814,共5页
Geological Review
基金
国土资源部地质调查项目"宁夏南部水资源综合评价与合理开发利用"(编号DKD2002005-1)的成果
关键词
地下水质
水岩作用
宁夏南部地区
groundwater quality
water-rock reaction
southern Ningxia Autonomous Region
