重庆南山老龙洞地下河出口水化学特征的水热相关性研究

A Study of the Hydrochemistry of the Water at the Debouchure of the Underground River at Laolongdong Cave and Its Relationships with Atmospheric Temperature and Rainfall

岩溶地下河是岩溶系统的主要组成部分,是岩溶作用最直接的场所.通过对老龙洞地下河出口处水体的主要水化学指标进行连续检测,并与气温、降水量数据进行对比,发现各项水化学指标的变化规律与气候温度无关,但与降水量变化关系较大,其中变化最明显的Ca2+和HCO-3,与降水量呈负相关性.

The karst underground river is an important part of the karst system and is the direct place where the karst process occurs. The main hydrochemical indexes of Laolongdong karst underground river were continuously determined and the data were compared with those of local temperature and precipitation. The results showed that the variations in the hydrochemical indexes determined were not related to at- mospheric temperature but were closely associated with rainfall. The variation in Ca2＋ and HCO3 concentrations, especially, was in a significant negative correlation with rainfall in the study area.