Irrigation Sciences and Engineering

Irrigation Sciences and Engineering

Estimation of Transmissivity and Storage Coefficients in a Dual-Aquifer System Using Combined Field and Analytical Methods

Document Type : Research Paper

Authors
Sheyda Mohammadifard 1
Jahangir Abedi Koupai 2
Saeid Eslamian 2
1 PhD Student, Department of Water Engineeribg, College of Agriculture, Isfahan University of Technology
2 Department of Water Engineeribg, College of Agriculture, Isfahan University of Technology.
10.22055/jise.2025.49895.2167
Abstract
This study investigates the hydrodynamic coefficients of the Kouhpayeh-Segzi (KSA) aquifer, a vital groundwater resource in Isfahan province in central Iran, located in an arid to semi-arid climate, where surface water is unreliable. The research addresses the increasing dependence on groundwater in the region, driven by population growth, agricultural expansion, and industrial development, which has led to over-extraction, groundwater table depletion, reduced well yields, and land subsidence. The main objective is to accurately estimate the parameters of hydrodynamic coefficients—transmissivity coefficient and storage —essential for sustainable groundwater management. Traditional pumping tests, although standard, are costly and limited by practical constraints, especially in deep or data-poor environments. To overcome these challenges, this study integrates multiple data sources, including grain-size distribution analysis, well drilling logs, geophysical surveys, and exploratory and observational well data. The approach involves re-analyzing pumping test data, determining alluvium thickness, bedrock elevation, and consequently preparing maps of the transmissivity and storage for the aquifer. The studied aquifer has two types of aquifers: confined and unconfined. The results show that the average values of hydrodynamic coefficients such as the transmissivity and storage of the KSA unconfined aquifer are estimated to be 960 m2/day and 3.9% and the transmissivity unconfined aquifer is estimated to be 914 m2/day, respectively. The findings emphasize the necessity of continuous monitoring, adaptive management, and the use of advanced analytical and geophysical techniques to ensure the long-term sustainability of groundwater resources in the KSA region.
Keywords
Aquifer
Groundwater
Transmissivity
Storage
Subjects
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Irrigation Sciences and Engineering
Volume 48, Issue 4
Winter 2026
Pages 79-103

  • Receive Date 01 July 2025
  • Revise Date 01 September 2025
  • Accept Date 22 September 2025
  • Publish Date 04 January 2026