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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。
Yufu River is an important supply source of Jinan karst groundwater, which is of great significance to Jinan to keep springs and supply water. In this paper, taking the Yufu River infiltration recharge experiment as an example, the effects of river infiltration on the dissolution and ionic composition of karst water mineral components, the seepage flow path after river infiltration, and the influence range are analyzed by using the methods of water chemistry and isotope analysis . The results show that the water chemistry type gradually transitions from SO_4-Ca-Mg type to HCO_3-Ca type in the spring group of Yufu River to the urban area. The infiltration of river water leads to the decrease of saturation index of calcite and dolomite in karst groundwater, Almost unchanged; Hydrochemical and isotopic data show that 48% of the karst water is in the vicinity of the horse-barbarian zhuangzhu. In terms of spatial distribution, the proportion of river infiltration recharge within 3km to the east of the riverbank can reach 50%. At the 8km east of the river, the proportion of river infiltration recharge is 5%. In the vicinity of Quanqun in urban areas, the proportion of river water infiltration and replenishment is even lower, <5%. The results of this observation show that river water recharge has not significantly affected the urban spring group. This study provides the basis for the formulation of Jinan karst water resources assessment and spring preservation program.