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The urgent and growing human need for water resources around the world, particularly in arid and semi-arid regions, has encouraged the search for new ways to store and reuse both ground and surface waters. This study deals with a method of using the injection wells to replenish groundwater resources and reuse it in dry seasons. According to an avai...
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Since 1960s, Artificial Recharge has been adopted to control the geological
disaster of land subsidence in Shanghai. The water source to recharge to the
confined aquifer meet the Standard for Drinking Water Quality which comes
from the Huangpu River or Yangtze River. Thinking the difference between the
primary environment of deep confined aquifer a...
Citations
... Infiltration wells are used to contribute to the evacuation of rains in urban areas and also as a mechanism to recharge aquifers in regions where they present an unsustainable abatement [1][2][3][4]. Their construction must be analyzed from several angles: objectives of artificial recharge, available technological options, chemical quality of the water, social factors, place, quantity of water to contribute, among others [5][6][7][8][9]. ...
In recent years, groundwater levels have been decreasing due to the demand in agricultural and industrial activities, as well as the population that has grown exponentially in cities. One method of controlling the progressive lowering of the water table is the artificial recharge of water through wells. With this practice, it is possible to control the amount of water that enters the aquifer through field measurements. However, the construction of these wells is costly in some areas, in addition to the fact that most models only simulate the well as if it were a homogeneous profile and the base equations are restricted. In this work, the amount of infiltrated water by a well is modeled using a stratified media of the porous media methodology. The results obtained can help decision-making by evaluating the cost benefit of the construction of wells to a certain location for the recharge of aquifers.
This study addresses the pressing issues of groundwater depletion and drought problems in the Erbil basin, a vital resource region in the Middle East. Focused on an area of strategic importance due to its large size and critical water resources, the study employs the Groundwater Modeling System (GMS) software to create a detailed 3D hydrogeological model based on extensive borehole data. With over 240 boreholes analyzed, the study strategically selects 70 accurate wells drilled by the Groundwater Directorate. The construction of the 3D stratigraphic models for the Erbil basin relies on three main historical data including boreholes, geological formations and a comprehensive approach, incorporating deep well logging data and the definition of distinct geological layers. By discerning the presence of previous and impervious layers, the model effectively categorizes the aquifer types within the Erbil basin. The aquifer system is delineated based on stratigraphic units, designating materials with high conductivity (silt, sand, and gravel) as aquifers and clay (or claystone) as aquitards. A 3D steady-state groundwater flow model is successfully executed, employing PEST pilot point for automated parameter estimation. The model, validated with a coefficient of determination (R2) of 0.9998, reveals hydraulic conductivity values ranging from 0.000980705 to 100 m/day and a recharge value of 0.000976443 m/day. The study classifies Erbil's aquifer types as unconfined, confined, and semi-confined, providing a valuable foundation for groundwater management. The primary objective of this study is to construct a calibrated numerical groundwater model for the multi-aquifer system in the Erbil basin. The model aims to serve as a robust tool for analyzing the sustainability of diverse groundwater infrastructure development strategies within the region. The Erbil basin poses unique challenges for groundwater modeling, marked by a scarcity of critical data such as monitoring well information, pumping rates, recharge rates, and flow budgets. In response to these limitations, the study adopts an innovative approach by integrating in situ data with earth observation data. The integration of these datasets seeks to overcome data constraints and enhance the accuracy of the groundwater model. By achieving calibration and validation of the numerical model, this research strives to provide a valuable resource for decision-makers, planners, and stakeholders involved in groundwater management in the Erbil basin. Ultimately, the study aims to contribute to the development of sustainable and effective strategies for the utilization and preservation of groundwater resources in this vital region and also to enhance practical management strategies for the Erbil groundwater basin, ensuring sustainable utilization of the crucial sub-surface water resources, an objective successfully achieved through this research.
Currently, one of the solutions to improve the decline in the water table of aquifers due to their uncontrolled extraction is artificial recharge schemes, especially in arid and semi-arid regions. The present study applies a Nonuniform Rational B-Spline functions (NURBS) based Isogeometric method to investigate the effects of injection well on rising of water table, unconfined aquifer hydrodynamic parameters, plus injection rate on it. Also, the best injection rate was determined by linking the IGA simulation model to the PSO optimization model. Initially, the Isogeometric Analysis (IGA) method was implemented to simulate water table over an unconfined aquifer by two extraction wells with discharges of 1142.85 and 1428.57 m ³ /day for 210 days and was compared with Modflow model. The model was tuned and run by constructing an injection well with 8214.28 m ³ /day injection rate for 1500 days. The IGA simulation results with ME=-0.0096, MAE=0.0111, and RMSE=0.0146 indicated the accuracy of the model in water table simulation compared with the Modflow model with ME=-0.0188, MAE=0.023, and RMSE=0.0284. The findings revealed that use of an injection well has a positive impact on increasing the water table with a rise of 1.24 m in the observation well. Investigating the effect of the parameters on the water table changes indicated that the injection rate directly affects changes in the water table. The water table rises by more than 43% with a 50% increase in the injection rate. Also comparing the effect of the injection rate parameter on the water table, the transmissivity and specific yield effects were not substantial. The results of IGA-PSO showed the best value of injection rate is 2000 m3/day, whereby the aquifer water table rises by an average of 37.12 cm.
