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Volume 40 Issue 4
Aug.  2021
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Article Navigation >  CARSOLOGICA SINICA  > 2021  >  40(4): 680-688
WU Dongqiang, XING Liting, LAN Xiaoxun, MENG Qinghan, HOU Yusong, ZHAO Zhenhua, SUN Bin, YUAN Xuesheng. Pore structure characteristics of karst water-bearing media in Jinan[J]. CARSOLOGICA SINICA, 2021, 40(4): 680-688.
Citation: WU Dongqiang, XING Liting, LAN Xiaoxun, MENG Qinghan, HOU Yusong, ZHAO Zhenhua, SUN Bin, YUAN Xuesheng. Pore structure characteristics of karst water-bearing media in Jinan[J]. CARSOLOGICA SINICA, 2021, 40(4): 680-688.
shu

Pore structure characteristics of karst water-bearing media in Jinan

  • 1.

    School of Water Resources and Environment， University of Jinan

  • 2.

    School of Water Resources and Environment， University of Jinan/Shandong Geological and Mineral Engineering Investigation Institute

  • 3.

    Shandong Geological and Mineral Engineering Investigation Institute

  • Publish Date: 2021-08-25
    Abstract
  • Jinan is a typical karst area in north China， with abundant karst water resources. The void structure of carbonate aquifers is the main seepage channel and storage space for karst water. The groundwater flowing in the pores continuously dissolves the carbonate rock， which intensifies the heterogeneity and complexity of the karst water-bearing medium. Through scholars’ research on the pore structure of carbonate rocks in north China，it is found that only by grasping of the pore structure characteristics of the karst water-bearing medium as well as understanding the movement laws of the karst water in the north China，can we provide a scientific basis for the sustainable utilization of karst groundwater. Taking Jinan spring area as an example， based on the atmospheric precipitation data groundwater level dynamic monitoring data and mercury intrusion porpsimetry test results of core in Jinan spring area from 2004 to 2019， the method of pore fractal dimension in fractal theory and mathematical statistics is used to explore the influence of pore structure of water-bearing rock formation on spring water level dynamics. The results show that， （1） The pores of the No.2 samples of the Chaomidian formation and Sanshanzi formation are well developed， the pore throats are concentrated， the rock formation has good water storage performance and large water storage space. The pores of the Bei’anzhuang section of the Majiagou formation are well-developed， with concentrated pore throats distribution，poor water storage performance and small water storage space. The No. 1 sample of the Sanshanzi formation and the Donghuangshan section of the Majiagou formation have uneven pore development， with scattered pore throat distribution， and large water storage space inside the rock； （2） The permeability of water-bearing stratum is affected by the distribution of pores and throats， pore surface roughness， pore heterogeneity， and the path and pore capillary bundles required for water flow seepage，of which the permeability of rock formation is mainly affected by the distribution of pores and throats； （3） There is a positive correlation between fractal dimension and groundwater dynamics.The fractal dimension of Chaomidian formation in the drainage area is smaller than that of Bei’anzhuang section. The annual variation of the groundwater level of the Chaomidian formation in the drainage area is smaller than that of the Bei’anzhuang section. The carbonate aquifer in Jinan spring area has large pore water storage space and good water storage performance. The unique pore structure of Jinan spring area plays an important role in maintaining the dynamic stability of Baotu spring water level.

     

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