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青木河水源源头为三叠系灰岩岩溶地下水;同时有温泉水汇入,途经重庆市沙坪坝区青木关镇时,水质受到农业生产用水、居民生活污水和工厂废水影响显著。选取自青木河上游到下游受不同人类活动影响的11个水样点,通过对青木河水化学特征的初步分析后发现:①河源岩溶地下水中K+、Zn、Fe、Mn、Cr的含量从上游往下游(至工农水库)增加;在有温泉水汇入的河流段,Ca2+、Mg2+、SO42-等离子含量以及EC(电导)都明显增加;HCO3-和H+浓度却降低。青木河的河水水化学特征受到当地温泉水的强烈影响,Ca2+和SO42-两个指标最为明显。②青木河受到9号温泉游泳池水汇入的影响,在8号骝公桥有Fe污染,还有由于人类活动的影响引起的Mn污染。③可以初步认为青木河没有Cu、Pb、As、Cr、Zn重金属污染。
The origin of the water in the Aoku River is limestone karst groundwater in the Triassic. At the same time, there is hot spring water that flows in through the Aokwood Township in Shapingba District of Chongqing Municipality. Water quality is greatly affected by agricultural production water, domestic sewage and industrial wastewater. Based on the preliminary analysis of the water chemistry characteristics of the Qingmu River, eleven water samples selected from the upstream and downstream of the Qingmu River under the influence of different human activities were found: (1) The content of K +, Zn, Fe, Mn and Cr in the karst groundwater of Heyuan was increased from upstream (To workers and peasants reservoirs) increased; in the section of the river with hot spring water, the content of Ca2 +, Mg2 +, SO42- and EC (conductivity) increased obviously; but the concentration of HCO3- and H + decreased. The chemical characteristics of river water in Qingmu River are strongly influenced by the local hot spring water, and the two indicators of Ca2 + and SO42- are the most obvious. (2) The Aoki River is affected by the influx of hot water from the hot spring pool No. 9, with Fe pollution at No. 8 Gongqiao and Mn pollution caused by human activities. ③ It is preliminarily believed that there is no heavy metal pollution such as Cu, Pb, As, Cr and Zn in Qingmu River.