济南泉域岩溶径流通道特征

岩溶发育程度的差异性对地下水的储存和运移有重要控制作用。采用示踪试验、泉水位动态观测等方法揭示济南岩溶含水介质特征。试验表明济南泉域岩溶水观测孔中示踪剂运移的浓度历时曲线呈现单峰、双峰、三峰、多峰形态并存,岩溶水径流通道有单一管道和多管道并存;泉水位衰减特征表明含水系统以小型管道、裂隙、溶隙、溶孔、网络状溶隙等共同释水,衰减系数的历时变化反映济南岩溶水系统岩溶发育存在垂直分带性。研究表明,济南泉域岩溶发育不均、有多重性,奥陶纪灰岩比寒武纪灰岩的岩溶更发育。为保持泉水持续喷涌,宜选择奥陶纪灰岩含水层进行人工补源。

the Characteristics of karst channel in the spring of Ji"nan spring region

Difference of karst development degree has an important control effect on the storage and migration of karst water.Using tracer test and the dynamic observation of spring water level to reveal the characteristics of karst aquifer medium.The field test indicated that in the karst water observation well of Jinan spring area, the concentration duration curve of the tracer migration shown that the peak shape was single peak coexisted with double peak, three peaks and multiple peaks.The karst development of the spring area in Jinan was uneven and the runoff channels of karst water existed a single pipe coexisted with multiple pipes.The attenuation characteristics of the spring water indicate that aquifer system with small pipes, fracture, solution cracks, dissolution pores and reticula solution cracks released water together.The diachronic changes of the attenuation coefficient reflected vertical zonality of the karst development in Jinan aqueous system. Research shows that the karst development of the spring area in Jinan was uneven and multiple. The karst development of Ordovician limestone was more than Cambrian Zhangxia and Fengshan limestone. To keep springs spewing normally, the appropriate choice implement site of artificial recharge measure was Ordovician limestone aquifer.