摘要
人类长期大规模开发利用地下水,使地下水位埋深增大,进而引起地下水脆弱性变化,这对采取合理的地下水保护措施具有指导意义。应用改进的DRASTIC模型对华北平原1959年、1984年和2005年地下水脆弱性进行了评价,结果表明华北平原地下水脆弱性以一般脆弱性、较低脆弱性和较高脆弱性为主,低脆弱性和高脆弱性所占比例较小;与1959相比,2005年低脆弱性区和较低脆弱性区面积增大,一般脆弱性区、较高脆弱性区和高脆弱性区面积减少;与1984年-2005年相比地下水脆弱性各级面积变化速率远大于1959年-1984年。地下水脆弱性降低程度与地下水位降幅呈正相关性。
Groundwater depth was increased due to extensive exploitation and utilization of groundwater, and led to the variation of groundwater vulnerability, which have guidance meaning for taking rational measures to protect groundwater. Using the improved DRASTIC model to assess groundwater vulnerability of 1959,1984 and 2005, the results showed that groundwater vulnerability of north China plain were mainly moderate, low and high, the very low and very high vulnerability were of small proportion. Comparing with 1959, the area of very low and low vulnerability expanded, while area of moderate, high and very high vulnerability reduced in 2005. Change rate of groundwater vulnerability areas from 1984 to 2005 was faster than that from 1959 to 1984. The degree that groundwater vulnerability decreases is positive correlation with water table decline.
出处
《南水北调与水利科技》
CAS
CSCD
2010年第6期78-81,93,共5页
South-to-North Water Transfers and Water Science & Technology
基金
中国地质调查局国土资源大调查项目(1212010634600)
国家重点基础研究发展计划项目(2010CB428801-1
2010CB428804-1)
关键词
地下水脆弱性
分布特征
演化特征
地下水位
groundwater vulnerability
distribution features
evolution features
groundwater level
