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<p>Accurate estimation of the hydrodynamic parameters of aquifers is extremely important for the operation and proper management of aquifer systems. Transmissivity is one of them, and is strongly correlated to the flows that can be taken from an aquifer. The multivariate classification by the method of potentials or dynamic clouds method was applied to the values of transmissivity, specific yield and hydraulic conductivity, determined on 82 wells capture the aquifer system of Annaba-Bouteldja. It allowed the discrimination of three multivariate subpopulations instead of two selected a priori. The geographical distribution of the wells forming each of these classes allows us to draw the following conclusions:<UnorderedList Mark="Dash"> <ItemContent> <p>The field is not completely stationary, but a local stationarity can be tolerated;</p> </ItemContent> <ItemContent> <p>Each of the multivariate classes is associated with a geological facies of the aquifer system.</p> </ItemContent> </UnorderedList></p><p>The results of the transmissivity mapping of the deep aquifer system show that the transmissivity semi-variogram can be well represented by a spherical model. The field data obtained by pumping test, allowed to make transmissivity maps from the surfer software using kriging for interpolation. The results show clear indications of the spatial distribution of transmissivity values of this aquifer over the entire study area. Furthermore, the spatial variability of these transmissivities, expressed by the variogram, can be explained by the tectonic structure deduced from the seismic data. It allows the definition of hydrogeological compartments, represented by the two grabens Ben Ahmed and Ben M'hidi, with different hydrodynamic behaviors delimited by faults.</p>

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Estimation of heterogeneous aquifer transmissivity by statistical and geostatistical approaches—case of the Annaba-Bouteldja aquifer

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • S. Hani,
  • I. Aichouri,
  • H. Majour,
  • B. Attoui,
  • H. Bouguerra,
  • H. Mezghache,
  • A. Hani

摘要

Accurate estimation of the hydrodynamic parameters of aquifers is extremely important for the operation and proper management of aquifer systems. Transmissivity is one of them, and is strongly correlated to the flows that can be taken from an aquifer. The multivariate classification by the method of potentials or dynamic clouds method was applied to the values of transmissivity, specific yield and hydraulic conductivity, determined on 82 wells capture the aquifer system of Annaba-Bouteldja. It allowed the discrimination of three multivariate subpopulations instead of two selected a priori. The geographical distribution of the wells forming each of these classes allows us to draw the following conclusions:

The field is not completely stationary, but a local stationarity can be tolerated;

Each of the multivariate classes is associated with a geological facies of the aquifer system.

The results of the transmissivity mapping of the deep aquifer system show that the transmissivity semi-variogram can be well represented by a spherical model. The field data obtained by pumping test, allowed to make transmissivity maps from the surfer software using kriging for interpolation. The results show clear indications of the spatial distribution of transmissivity values of this aquifer over the entire study area. Furthermore, the spatial variability of these transmissivities, expressed by the variogram, can be explained by the tectonic structure deduced from the seismic data. It allows the definition of hydrogeological compartments, represented by the two grabens Ben Ahmed and Ben M'hidi, with different hydrodynamic behaviors delimited by faults.