摘要:
黑龙潭位于昆明市北缘的五老山山麓,沿黑龙潭东支断裂带出露地表,该区分布三个岩溶泉,分别是:清水潭、浑水潭、小水潭,文章运用氢氧稳定同位素方法对它们进行连续的观测研究。通过对大气降水和泉水氢氧稳定同位素特征进行分析,揭示研究区岩溶泉水的来源及泉域含水层特征。得出以下结论:(1)通过大气降水δ18 O -δD 关系建立当地大气降水线,大气降水线和泉水的稳定同位素分析表明泉水来源于大气降水,而且主要来源于夏季降水。(2)高斯混合模型分析结果表明,清水潭的补给不仅来源于野猫山地区,还包括径流过程中的入渗补给,而且入渗补给量并不小。浑水潭旱雨两季补给类型有所区别。小水潭除受北部二叠系灰岩含水层补给之外,很有可能也受东北部玄武岩山地的孔洞裂隙水补给。
Abstract:
Heilongtan areais located at foothill of Wulao Mountains in the northern suburb of Kunming City, emerges along east branch of Heilongtan Fault.There are three karst springs distributed in this area,i.e. Qingshuitan,Hunshuitan and Xiaoshuitan.In this paper,hydrogen and oxygen stable isotope method is used to analyze the samples of precipitation water and spring water periodically to investigate the origin of the springs and the characteristics of the aquifer in the area.The following conclusions have been made:1)the i-sotope analysis of precipitation water and spring water shows that the spring is originated from precipitation, especially in summer;2)Gaussian mixture model shows that the recharge of Qingshuitan is not only from the Yemao mountain,but also from runoff infiltration which is not minor in quantity.Recharge types are differ-ent in wet season and dry season for the Hunshuitan karst system.The Xiaoshuitan karst system receives re-charge mainly from the northern Permian limestone aquifer,and sparingly from the fissure water from the northeastern basalt mountain.
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