A REGIONAL STEADY STATE GROUNDWATER FLOW MODELING OF THE QUATERNARY DEPOSITS USING ISOTOPE-HYDROGEOCHEMICAL DATA, EASTERN PART OF LITHUANIA

2012 ◽  
Author(s):  
Anicetas Stuopis
Keyword(s):  
Steady State ◽  
Groundwater Flow ◽  
Flow Modeling ◽  
Groundwater Flow Modeling ◽  
Quaternary Deposits

scholarly journals Steady State Groundwater Flow Modeling of an Ex-Landfill Site in Kuala Lumpur, Malaysia

2015 ◽  
Vol 11 (5) ◽  
pp. 348-357 ◽  
Author(s):  
Mustapha Atta ◽  
Wan Zuhairi Wan Yaacob ◽  
Othman Bin Jaafar
Keyword(s):  
Steady State ◽  
Groundwater Flow ◽  
Landfill Site ◽  
Flow Modeling ◽  
Kuala Lumpur ◽  
Groundwater Flow Modeling

Steady-state saturated groundwater flow modeling with full tensor conductivities using finite differences

2010 ◽  
Vol 36 (10) ◽  
pp. 1211-1223 ◽  
Author(s):  
Liangping Li ◽  
Haiyan Zhou ◽  
J. Jaime Gómez-Hernández
Keyword(s):  
Steady State ◽  
Groundwater Flow ◽  
Finite Differences ◽  
Flow Modeling ◽  
Groundwater Flow Modeling

scholarly journals Numerical Groundwater Flow Modeling of Dijil River Catchment, Debre Markos Area, Ethiopia

2021 ◽  
Vol 13 (1) ◽  
pp. 89-109
Author(s):  
Tadesse Ketemaw ◽  
Abdelwassie Hussien ◽  
Fethangest Woldemariyam Tesema ◽  
Berihu Abadi Berhe
Keyword(s):  
Steady State ◽  
Groundwater Flow ◽  
Conceptual Model ◽  
Water Budget ◽  
Drainage Basin ◽  
System Response ◽  
Flow Modeling ◽  
Groundwater Flow Modeling ◽  
River Catchment ◽  
Budget Analysis

Dijil River catchment is a sub-catchment of the Abay drainage basin and covers 138.28 km2. This paper presents numerical groundwater flow modeling at steady-state conditions, in a single-layer aquifer system under different stress or scenarios. A numerical groundwater flow models represent the simplification of complex natural systems, different parameters were assembled into a conceptual model to represent the complex natural system in a simplified form. The conceptual model was input into the numeric model to examine the system response. Based on geologic and hydrogeological information, confined subsurface flow condition was considered and simulated using MODFLOW 2000. The model calibration accounts matching of 24 observation points with the simulated head with a permissible residual head of ±10m. The sensitivity of the major parameters of the model was identified during the calibration process. According to the simulated water budget in the model, the simulated inflow is found to be 1.2791870E+05 m3/day which is nearly equal to the simulated outflow of 1.2791755E+05 m3/day with the difference being only 1.1484375E+00 m3/day. Water budget analysis reveals that outflow from river leakage accounts for 92.8 % of the total outflow and 14.1 % of the total inflow comes from the river leakage in the study area. Three scenarios of increased withdrawals and one scenario of altered recharge were used to study the system response. Accordingly, an increase in well withdrawal in scenario-I (existing wells pump simultaneously), scenario-II (existing drilled wells yield withdrawal increased by 30%), and scenario-III (additional eight wells having expected yield of 30 l/s drill and pump) resulted in an average decline of the steady-state water level by 1.06m, 1.68m, and 4.46m, respectively. They also caused the steady-state stream leakage to be reduced by about 2.93%, 4.58%, and 11.23%, and subsurface outflow by 9.41%, 14.67%, and 37.86%, respectively. A decrease in recharge by 25% and 50% results in a decrease of the head by 6.1m and 13.4m respectively, and a stream leakage decrease by 20.3%, and 40.3% respectively as compared to the simulated steady-state value. Therefore, adequate groundwater level monitoring wells should be placed in the catchment to control the total abstraction rates from the aquifer and fluctuations in groundwater levels.

Groundwater flow modeling to support water management scenarios – the Bekaa Valley, Lebanon

2016 ◽  
Vol 39 ◽  
pp. 85-88
Author(s):  
Giovanni Formentin ◽  
Mauro Consonni ◽  
Simone Sala ◽  
Vincenzo Francani
Keyword(s):  
Water Management ◽  
Groundwater Flow ◽  
Flow Modeling ◽  
Groundwater Flow Modeling ◽  
Management Scenarios

GEOPOLIS software tools – Groundwater flow modeling at deep repository of liquid radioactive waste at Severny test site

2021 ◽  
pp. 91-97
Author(s):  
V. V. Suskin ◽  
A. V. Rastorguev ◽  
I. V. Kapyrin
Keyword(s):  
Groundwater Flow ◽  
Flow Model ◽  
Liquid Radioactive Waste ◽  
Three Dimensional ◽  
Test Site ◽  
Geological Structure ◽  
Groundwater Flow Model ◽  
Flow Modeling ◽  
Three Dimensional Model ◽  
Groundwater Flow Modeling

This article discusses a three-dimensional groundwater flow model of a deep disposal facility at Severny test site. The three-dimensional model is a part of the certified software GEOPOLIS, based on the hydrogeological code GeRa (Geomigration of Radionuclides) serving as the calculation engine. This study describes the hydrogeological patterning of the groundwater flow model, as well as the results of calibration and verification of the model water heads with respect to the data of monitoring for more than 40 years of the deep repository exploitation. The article begins with a brief overview of the previously developed hydrogeological models of this object and continues with a description of the geological structure of the territory, and with a substantiation of the boundaries and parameters of the model. The results of groundwater flow modeling, model calibration, verification and estimation of discrepancy between the model results and monitoring data are shown. The comparison of the modeled and observed water heads in the stationary conditions (before the start of injection) and during operation of the deep repository allows making conclusion on the quality of calibration.

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