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以重庆市南川区柏树湾表层岩溶泉溪流为例,沿柏枝溪流程以一定间距监测水体中HCO3-的浓度及其pH、电导率、溶解氧等水化学参数,并初步探究溪流水的脱气效应。结果显示(1)表层岩溶地下水出露地表后,HCO3-浓度沿流程呈现出递减的规律;(2)HCO3-浓度递减的快慢反映了脱气作用的强弱,溪流脱气速率具有“枯水期>平水期>丰水期”的特点;(3)暴雨期间由于稀释效应HCO3-浓度递减趋势不明显,但降雨后期,递减又开始逐渐产生;(4)脱气效应在造成溪流水HCO3-浓度减小的同时,也导致电导率(EC)沿柏枝溪流程逐渐降低,而pH值逐渐升高;(5)沿途溶解氧(DO)昼夜变化表明,水生生物作用对脱气作用可能也有一定的影响,但其影响机制还有待进一步的研究。
Taking the surface karst spring stream of Bai Shue Wan in Nanchuan District of Chongqing Municipality as an example, the concentration of HCO3- and its pH, conductivity, dissolved oxygen and other water chemistry parameters were monitored at certain intervals along the process of Boji Creek. Gas effect. The results show that (1) the HCO3- concentration decreases along the surface after the surface karst groundwater is exposed to the ground surface; (2) the decreasing speed of HCO3- reflects the intensity of degassing, and the stream degassing rate has a "dry season (3) During the rainstorm, the decreasing trend of HCO3- concentration was not obvious due to the dilution effect, but the decrease began to gradually occur in the later period of rainfall. (4) The effect of de-aeration on the HCO3- At the same time, the EC decreased gradually along the process of Baiji Creek and the pH value gradually increased. (5) The diurnal variation of dissolved oxygen (DO) along the route indicated that the action of aquatic organisms on deaeration may also have Certain influence, but its influence mechanism still needs further study.