玉符河对济南岩溶水化学过程的影响研究

发布时间：2018-10-12 09:45

【摘要】：玉符河是济南岩溶地下水重要补给源,对济南保泉和供水具有重要意义。本文以2015年玉符河入渗补给试验为例,利用水化学和同位素方法分析了河水入渗对岩溶水矿物组分溶解及离子成分的影响、河水入渗后的渗流路径、影响范围等问题。结果表明,玉符河至城区泉群,水化学类型由SO_4-Ca-Mg型逐渐过渡到HCO_3-Ca型;河水的入渗导致岩溶地下水中方解石和白云石饱和指数减小,石膏的饱和指数几乎不变;水化学和同位素数据表明催马—蛮子庄一带岩溶水中河水比例为48%。在空间分布上,河岸东侧3km范围内河水入渗补给量占比可达50%。在河道东侧8km处,河水入渗补给量占比为5%。在靠近城区泉群一带,河水入渗补给量占比更低,5%。本次观测结果表明,河道补水尚未对城区泉群有明显影响。本研究为济南岩溶水资源评价和保泉方案的制定提供依据。
[Abstract]:Yufu River is an important recharge source of karst groundwater in Jinan, which is of great significance to the protection of spring and water supply in Jinan. In this paper, the influence of water infiltration on the dissolution of mineral components and ion composition of karst water, the seepage path and the influence range of water infiltration are analyzed by means of hydrochemistry and isotope method, taking Yufu River infiltration and recharge test in 2015 as an example. The results show that the hydrochemical type of Yufu River is gradually transferred from SO_4-Ca-Mg type to HCO_3-Ca type, the saturation index of calcite and dolomite in karst groundwater decreases, and the saturation index of gypsum is almost unchanged. Hydrochemical and isotopic data show that the ratio of karst water in Cuma-Manzizhuang is 48. In terms of spatial distribution, the proportion of water infiltration and recharge within the 3km range on the east side of the river bank can reach 50. At 8km on the east side of the river, the proportion of water infiltration and recharge is 5. In the vicinity of the Quan area, the proportion of river water infiltration and recharge is even lower, 5%. The observation results show that the channel replenishment has not had a significant effect on the spring group in the urban area. This study provides the basis for the evaluation of karst water resources in Jinan and the establishment of the plan of protecting spring.
【作者单位】：中国科学院地质与地球物理研究所;山东省水利科学研究院;
【基金】：国家自然科学基金项目(41172215) 山东省水利厅、财政厅水生态文明试点科技支撑计划资助
【分类号】：P641.13

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