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<p>This study develops a dynamic model via Vensim software for the Wadi Al-Abyadh aquifer, which is connected to and feeds falaj Daris. The condition of this aquifer is complex, as falaj Daris obtains all of its water from the Wadi Al-Abyadh aquifer and acts as a large pipe between the aquifer and its downstream users. To develop this model in Vensim, the input and output components along with their values for the period 2019–2020 and their internal relationships were defined, introduced, entered, and drawn. Then, the proposed model was calibrated using two methods: 1. Comparison of the water balance results acquired from the Vensim, manual, and groundwater storage change methods and 2. Comparison of the volume of extracted water from falaj Daris, as calculated by Vensim, with the observed data. The Vensim results showed good agreement. Based on the second method, the NRMS error was 0.24, indicating acceptable performance. Subsequently, two scenarios were established in the Vensim model, and the water balance for the following two years (2020 and 2021) was predicted. The results revealed aquifer deficits of -1.7 MCM and -1.9 MCM for the first and second scenarios, respectively.</p>

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Aquifer-Falaj dynamic modeling using VENSIM: a pathway to sustainable water management

  • 期刊论文

  • 发表日期：

    2026年7月14日

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  • Ali Mohtashami,
  • Abdullah Al-Ghafri,
  • Majid Labbaf Khaneiki,
  • Nahid Majidi Khalil Abad

摘要

This study develops a dynamic model via Vensim software for the Wadi Al-Abyadh aquifer, which is connected to and feeds falaj Daris. The condition of this aquifer is complex, as falaj Daris obtains all of its water from the Wadi Al-Abyadh aquifer and acts as a large pipe between the aquifer and its downstream users. To develop this model in Vensim, the input and output components along with their values for the period 2019–2020 and their internal relationships were defined, introduced, entered, and drawn. Then, the proposed model was calibrated using two methods: 1. Comparison of the water balance results acquired from the Vensim, manual, and groundwater storage change methods and 2. Comparison of the volume of extracted water from falaj Daris, as calculated by Vensim, with the observed data. The Vensim results showed good agreement. Based on the second method, the NRMS error was 0.24, indicating acceptable performance. Subsequently, two scenarios were established in the Vensim model, and the water balance for the following two years (2020 and 2021) was predicted. The results revealed aquifer deficits of -1.7 MCM and -1.9 MCM for the first and second scenarios, respectively.