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为研究岩溶地下河水化学指标在昼夜变化期间对暴雨响应的敏感性,以Multi3430便携式仪器和CDTP300作为基础监测,在暴雨条件、短时间尺度和高精度条件下,对重庆青木关姜家泉物理化学性质对暴雨及昼夜变化的响应进行监测研究,结果表明:地下河化学指标对环境变化反应敏感.暴雨期间,大量的Ca2+,HCO3-,NO3-等离子随雨水汇入地下河引起水质在短时间内变化较为明显,暴雨在一定程度上加速了碳酸盐岩的溶蚀,且K+,Na+,Ba2+等阳离子质量浓度也受到流量的影响;在暴雨结束数小时之后,表层岩溶带的高裂隙率和渗透性发挥作用,水动力作用和CO2效应逐渐占主导地位.Ca2+,HCO3-等离子质量浓度昼夜尺度变化总体表现为昼大于夜.
In order to study the sensitivity of chemical indicators of karst underground river to rainstorm during diurnal variation, the Multi3430 portable instrument and CDTP300 were used as the basic monitoring. Under heavy rain conditions, short time scale and high precision conditions, the physical and chemical properties of Jiang Jiaquan Heavy rain and diurnal variation, the results show that the chemical indicators of underground river are sensitive to the environmental change.During rainstorm, a large amount of Ca2 +, HCO3- and NO3- Clearly, heavy rain accelerated carbonate dissolution to a certain extent, and the mass concentration of cation such as K +, Na +, Ba2 + was also affected by the flow rate. After several hours of heavy rain, the high fracture rate and permeability of epikarst zone Hydrodynamics and CO2 effect gradually dominated.Calcium, HCO3-plasma mass concentration diurnal scale changes in the overall performance of the day is greater than the night.