摘要
应用水化学常、微量元素、同位素分析,结合区域水均衡分析等综合手段,对云南省保山市隆阳区易罗池岩溶水系统的形成机理、径流特征进行了研究。水化学分析结果显示,易罗池泉水和沙河地表水相关性较好;水均衡分析显示,易罗池岩溶水系统中每年通过岩箐组(O_1y)灰岩接受大气降水的最大补给量约为100×10~4 m^3,占易罗池岩溶大泉出口总水量1 387×10~4 m^3/a中的很小比重。本文得出易罗池泉水为沿大宝盖向斜灰岩夹层发育的岩溶管道裂隙水,与上层非可溶岩基岩裂隙水无水力联系;岩溶泉水主要在大宝盖向斜O_1y地层灰岩夹层发育,于易罗池排泄,主要补给源为大宝盖向斜北西翼沙河上游朝阳寨一带的地表水。
The Yiluochi karst water system lies in Longyang district, Baoshan City, Yunnan Province. It is on the western margin of the Baoshan basin. The primary aquifer of this system is composed of the sediment of Oly, which is bounded by the clastic rock and the fault. Geological structures with northwest and north- south trends dominate this region. The karst water system has a large karst spring with a flow rate of 440 L/ s, as the main source of drinking water in Longyang district of Baoshan City. The proposed Baoshan tunnel of the Darui railway will cross the Yiluochi karst water area. This work has studied the formation of the karst water system and the characteristics of the groundwater flow, in order to provide a scientific basis for the design and construction schemes of the Baoshan tunnel, including the analysis of the influence of the tun- nel project on the hydrogeological environment. The applications of chemical major elements and trace ele- ments of the water and isotope analysis, in combination with regional water balance analysis, comprehensive- ly permit to achieve the study objectives planned. The results of water chemistry analysis show the existence of a good correlation between the Yiluochi spring water and the stream water at Shahe river. The water sam- ples of the Chaoyang village at Shahe river and Yiluochi exhibit a significantly higher SO2 content than the other water bodies, which also shows a relationship of the water between Shahe river and Yiluochi. The alu minium （as A1） anomalies of the water samples mostly occur in the water flowing through the Dabaogai syn- cline core area with the outcrop of O1l stratum, where the Al contents are merely 16.1 ug/L, which is simi- lar to the content of samples from the upstream of the Shahe river. It proves that a little of the Yiluochi wa- ter is recharged by that from the syncline Oll stratum. Water balance analysis shows that O1y limestone ac- cepts atmospheric precipitation as a recharge amounts up to 100×10^4 m^3 per year, accounting for a small proportion of total water 1,387 ×10^4 m^3 discharged via Yiluochi karst springs. It is believed that the Yiluochi springs are fissure water which flows along the limestone karst channels of the limestone interbeds in the Dabaogai syncline. The springs have no hydraulic connection with the upper bedrock fissure water. It is mainly developed in the O1y limestones of the Dabaogai syncline and feeds the Yiluochi springs. The main source of the spring water is the surface water from the upstream of the Shahe river near Chaoyang village, which is located in the northwest of the Dabaogai syncline.
出处
《中国岩溶》
CAS
CSCD
北大核心
2016年第3期254-261,共8页
Carsologica Sinica
基金
铁道部科技研究开发计划(2008G027-C)
关键词
易罗池
岩溶水
水化学
水均衡分析
Yiluochi, karst water, water geochemistry, water balance analysis
