Application of Aquifer Surface Recharge in the Modification of GALDIT Method to Assess the Risk of Seawater Intrusion in Qom Aquifer
Message:
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
A realistic understanding of aquifer vulnerability to seawater intrusion is one of the important prerequisites for coastal aquifer management. The GALDIT method is a proper tool that, despite considering the qualitative, hydrogeological, and geological characteristics of the aquifer, has not considered the role of aquifer surface recharge. The Qom-Kahak study area is a part of the salt lake catchment, which is located in the arid and desert part of central Iran. Due to the shortage of surface and groundwater resources in the region, some of the drinking and industrial needs of Qom city are met from water outside the study area. This study, by adding the aquifer surface recharge parameter introduces the GALDITR model to evaluate the Qom aquifer vulnerability to saltwater intrusion from the Salt Lake. Then, the analytical hierarchy process method is used to review the weight of GALDITR model parameters according to the characteristics of the studied aquifer. Based on the obtained results, the high rank of the aquifer surface recharge parameter in a large part of the aquifer led to an increase in the area of moderate vulnerability of the GALDITR model compared to the GALDIT method. In the GALDITR-AHP model, the parameters of distance from the shore, groundwater level above the lake, and the impact of seawater intrusion gained more weight than other parameters, respectively. With increasing the low vulnerability area in the GALDITR-AHP model, the aquifer vulnerability near Qom city decreased. The vulnerability index of GALDITR-AHP, GALDITR, and GALDIT models showed the highest correlation with chloride ion values at observation points, respectively. The results showed that areas with high and moderate vulnerability in the eastern part of Qom aquifer covering about 14 % of the total aquifer area are more prepared for seawater intrusion and can be considered as the expansion of seawater wedge for monitoring and optimal management of coastal aquifer.
Language:
Persian
Published:
Journal of Water & Wastewater, Volume:32 Issue: 134, 2021
Pages:
94 to 112
magiran.com/p2324130  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!