Investigating future changes in groundwater quantity and quality in the Khash alluvial aquifer through numerical groundwater flow and solute transport modeling

نویسندگان

چکیده مقاله:

The Khash alluvial aquifer, in Sistan and Baluchestan Province, supplies the water needed for agriculture, drinking, and industry in the Khash area. In order to predict the future status of groundwater level and water quality, and to find aquifer management solutions, groundwater flow and solute transport models were developed using MODFLOW and MT3DMS. GMS 10.3 was used to develop the model. Calibration and validation of the model were performed using a seven-year period and a three-year period, respectively. The results showed that the flow model has a good performance in simulating groundwater levels when compared to observational data. The RMSE values ​​for calibration and validation periods were 0.67 m and 0.96 m, respectively. The solute transport model was established based on the groundwater flow model and was calibrated based on observational data of Cl- concentration in eight wells over a 10-year period from October 2007 to September 2016. The calibrated models were used to evaluate two scenarios in the forecast period (2016-2026). In the first prediction scenario, assuming the aquifer recharge and discharge rates are similar to the current condition, it was found that a significant drawdown in water levels will occur in most parts of the aquifer, especially south and southeast of the aquifer. As a result, the average water level will drop by more than 1.5 meters over 10 years, and consequently, Cl- concentration and groundwater salinity will increase. In the other scenario, which was defined to determine the safe yield of groundwater, it was found that to reach equilibrium and prevent increases in salinity, groundwater withdrawals from wells should be reduced by 50%.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Groundwater Flow and Salinity Intrusion Simulation in Malekan Plain Aquifer

Due to groundwater overextraction, during the recent years, Malekan plain aquifer has been faced to a risk of increasing salination. The groundwater flow model of the plain was designed, invesitagion of groundwater flow regime and precise hydraulic parameters estimation, utilizing the various method such as  geological surveys, tomography methods, hydrochemical analysis and simulation of aquife...

متن کامل

book review: numerical simulation of groundwater flow and solute transport, edited by l. elango

a book review is presented on numerical simulation of groundwater flow and solute transport, edited by l. elango, published by allied publishers pvt. ltd. in 2005, 245 pp, hardback isbn 81-7764-923-x.

متن کامل

Numerical Modeling of Groundwater Flow in Karst Aquifer, Makeng Mining Area

Problem statement: Making iron ore is one of the largest mining projects in south east of china. Due to the development of mining activities in that site, it has become necessary to increase the depth of exploration. Increase the exploration depth makes the mining tunnels subjected to the karst water inrush. Approach: A hydrological and a hydrogeological model for the Makeng area have been deve...

متن کامل

155: Numerical Models of Groundwater Flow and Transport

The article gives an introduction to numerical modeling of flow and transport problems and to software tools that are currently in use for modeling such phenomena. Details are explained on numerical approximations leading to different numerical models. Extensions for reactive transport are mentioned. Basic guidelines and criteria are given that should be taken into account by the modeler in ord...

متن کامل

Use of Numerical Models to Simulate Groundwater Flow and Transport

In the past, the main driving force for hydrogeologic studies has been the need to assess the water-supply potential of aquifers. During the past 20 years, however, the emphasis has shifted from water-supply problems to water-quality problems. This has driven a need to predict the movement of contaminants through the subsurface environment. One consequence of the change in emphasis has been a s...

متن کامل

Assessing the Impact on Groundwater of Solute Transport in Contaminated Soils Using Numerical and Analytical Models

Expansion of human activities causes dispersion of pollutants in the subsurface environment. The fate and movement of dissolved substances in soils and groundwater has generated considerable interest out of concern for the quality of the subsurface environment. Many analytical solutions for partial differential equations exist in soil science. Numerical solutions are more general, and often mor...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


عنوان ژورنال

دوره 7  شماره 4

صفحات  1- 10

تاریخ انتشار 2020-02

با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.

کلمات کلیدی

کلمات کلیدی برای این مقاله ارائه نشده است

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023