Using MODFLOW to investigate the effect of persistent water deficit in Al‑Jizi coastal aquifer, Sultanate of Oman

Javed Akhtar, Ahmad Sana, Syed Mohammed Tauseef

نتاج البحث: المساهمة في مجلةArticleمراجعة النظراء


Groundwater is the principal water resource in the Sultanate of Oman and its management is critical to the country’s current
development as well as those of future generations. Groundwater aquifers are under continuous threat due to overuse
in the arid and semi-arid countries having lack of surface water sources and rainfall. Proper management of groundwater
resources requires estimation of aquifer properties and groundwater abstraction rate. To study an important coastal aquifer
in Wadi Al-Jizi in Al-Batinah region that happens to be the most important agricultural region in Oman, a three-dimensional
groundwater flow model (MODFLOW) was employed to simulate the groundwater flow. The hydraulic conductivity and
vertical anisotropy of the two-layer model were calibrated using observed values of the year 2000 in steady-state condition.
Sensitivity analysis was conducted for the hydraulic conductivity of both the layers affecting the water level in the model
domain. A set of 9 observation wells scattered over the aquifer were used in the calibration. After the validation under steady
flow conditions, the model was validated in the transient state from the year 2000 to 2017 and a good agreement was found.
The predictions of groundwater elevations were made using the validated model until year 2040 under various pumping
rate scenarios. Results showed that if the pumping rates were increased by 30%, the decline of water table could reach 4 m
at some places. The results of this study could be useful for the consulting engineers and public authorities for an efficient
management of groundwater resources in Wadi Al-Jizi coastal aquifer.
اللغة الأصليةEnglish
رقم المقال1448
عدد الصفحات15
دوريةArabian Journal of Geosciences
مستوى الصوت15
رقم الإصدار17
المعرِّفات الرقمية للأشياء
حالة النشرPublished - سبتمبر 2022

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