Occurrence and evolution of the Xiaotangshan hot spring in Beijing, China

被引:8
作者
Zhou Haiyan [1 ,2 ]
Zhou Xun [1 ,2 ]
Chai Rui [1 ,2 ]
Yu Lan [1 ,2 ]
Liu Chunhui [1 ,2 ]
Li Liangping [1 ,2 ]
机构
[1] China Univ Geosci, Beijing Key Lab Water Resources & Environm Engn, Beijing 100083, Peoples R China
[2] China Univ Geosci, Sch Water Resources & Environm, Beijing 100083, Peoples R China
来源
ENVIRONMENTAL GEOLOGY | 2008年 / 53卷 / 07期
基金
中国国家自然科学基金;
关键词
hot spring; hydrochemistry; isotope; thermal groundwater; geothermal resources; Beijing;
D O I
10.1007/s00254-007-0757-z
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Thermal groundwater occurs in bedrock aquifers consisting of the dolomite of the Wumishan Group of the Jixianin System and the Cambrian carbonate in the Xiaotangshan geothermal field near the northern margin of the North China Plain, China. The hot water in the geothermal field of basin-type discharges partly in the form of the Xiaotangshan hot spring under natural conditions. The hot water has TDS of less than 600 mg/L and is of Na center dot Ca-HCO3 type. The geothermal water receives recharge from precipitation in the mountain area with elevation of about 500 m above sea level to the north of the spring. Thermal groundwater flows slowly south and southeast through a deep circulation with a residence time of 224 years estimated with the Ra-Rn method. The Xiaotangshan hot spring dried up in the middle of the 1980s owing to the increasing withdrawal of the hot water in the geothermal field in the past decades. The water level of the geothermal system still falls continually at an annual average rate of about 2 m, although water temperature changes very little, indicating that the recharge of such a geothermal system of basin-type is limited. Over-exploitation has a dramatic impact on the geothermal system, and reduction in exploitation and reinjection are required for the sustainable usage of the hot water.
引用
收藏
页码:1483 / 1489
页数:7
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