scholarly journals Hydrogeological Conceptual Model in the Middle of Randublatung Groundwater Basin

2021 ◽  
Vol 926 (1) ◽  
pp. 012078
Author(s):  
D L Setyaningsih ◽  
K D Setyawan ◽  
D P E Putra ◽  
Salahuddin
Keyword(s):  
Groundwater Flow ◽  
Conceptual Model ◽  
Unconfined Aquifer ◽  
Primary Data ◽  
Essential Information ◽  
Aquifer System ◽  
The North ◽  
Shallow Wells ◽  
Groundwater Basin ◽  
Constant Head

Abstract Randublatung groundwater basin is one of the groundwaters basins with massive utilization of groundwater pumping. However, the knowledge of the comprehensive hydrogeological system in this groundwater basin is limited, so this research aims to determine a comprehensive hydrogeological conceptual model of the Randublatung groundwater basin. The methodology was conducted by collecting secondary and primary data of deep and shallow wells to evaluate boundaries of pattern and direction of groundwater flow and develop the aquifer system’s geometry. The result shows that the groundwater flow boundaries are Grogol River in the west, Wado River in the East, Bengawan Solo river in the South as a river boundary, and Rembang Mountains in the North as a constant head boundary. Therefore, groundwater flows from the hills area to the Bengawan Solo River and the north as the river’s flow. Based on the log bor evaluation, the aquifer system of the study area consist of an unconfined aquifer with a maximum thickness of 20 m and three layers of confined aquifers with thickness vary between 8 to 60 m. the hydraulic conductivity of the aquifers depends on the aquifer’s lithology range from sand, gravel, limestone, and sandstone. This hydrogeological conceptual model provides essential information for numerical groundwater models in the middle of the Randublatung groundwater basin.

scholarly journals Groundwater Flow Modeling at Sejorong Watershed, Sumbawa,West Nusa Tenggara, Indonesia

2019 ◽  
Vol 4 (2) ◽  
pp. 43
Author(s):  
Adelide Asriati Sekar Rianda ◽  
Doni Prakasa Eka Putra ◽  
Wahyu Wilopo
Keyword(s):  
Numerical Model ◽  
Groundwater Flow ◽  
Conceptual Model ◽  
Particle Tracking ◽  
Volcanic Rocks ◽  
Research Area ◽  
Management Plan ◽  
Middle Part ◽  
Primary Data ◽  
Aquifer System

Batu Hijau mine pit is known as one of the largest copper pit mine in Nusa Tenggara Barat, Indonesia. Similiar as other copper mine pits in Indonesia, This site also faces acid mine water (AMD) problem. Based on the mine management plan, the AMD generated from this pit is being collected into Santong ponds in the southwest of the pit located in the upstrean area if Sejorong watershed. By the next decade, Batu Hijau mine will be in the closure mine period and it is important to understand the probable movement of AMD under the Santong ponds whether the AMD leaked to groundwater or not. This research aims to develop a numerical model of groundwater flow and predict the movement of AMD by applying particle tracking method. Secondary and primary data of geology, hydrology, and hydrogeology. Also, groundwater pumpage discharge information was collected and analysed to develop hydrogeological conceptual model and the numerical model. The conceptual model of hydrogeological system in the research area is known to be built on unconfined aquifer system from a combination of weathered and fractured volcanic rocks in the upstream to middle part of watershed and majorly by alluvial and coastal deposits in the downstream area. The thickness of aquifer is vary between 20 to about 300 m and divide into 5 layers in the numerical model, with hydraulic conductivity ranges between 5 to 100 m/day and groundwater recharge is vary between 180 to 700 mm/year from downstream to upstream of watershed. Groundwater flow boundaries in the Sejorong watershed are mainly controlled by topographical feature as water divide boundaries and the existing of Sejorong parennial rivers in the middle of this watershed. Steady state particle tracking results from the numerical groundwater flow model show AMD from Santong ponds may migrate in groundwater only to a distance of about 500 m to the downstream and therefore it is unlikely that AMD seepages from Santong pond may contaminate water in the production wells

scholarly journals Three-dimensional conceptual model for the Hanford Site unconfined aquifer system: FY 1994 status report

1994 ◽  
Author(s):  
P.D. Thorne ◽  
M.A. Chamness ◽  
V.R. Vermeul ◽  
Q.C. Macdonald ◽  
S.E. Schubert
Keyword(s):  
Conceptual Model ◽  
Three Dimensional ◽  
Unconfined Aquifer ◽  
Status Report ◽  
Hanford Site ◽  
Aquifer System

scholarly journals Review: Groundwater flow and transport modeling of karst aquifers, with particular reference to the North Coast Limestone aquifer system of Puerto Rico

2012 ◽  
Vol 20 (8) ◽  
pp. 1441-1461 ◽  
Author(s):  
Reza Ghasemizadeh ◽  
Ferdinand Hellweger ◽  
Christoph Butscher ◽  
Ingrid Padilla ◽  
Dorothy Vesper ◽  
...  
Keyword(s):  
Puerto Rico ◽  
Groundwater Flow ◽  
Transport Modeling ◽  
North Coast ◽  
Karst Aquifers ◽  
Limestone Aquifer ◽  
Aquifer System ◽  
Flow And Transport ◽  
The North ◽  
Groundwater Flow And Transport

scholarly journals Environmental Diagnosis of the Unconfined Aquifer in the Coastal Region of Northeast Brazil

2020 ◽  
Vol 8 (10) ◽  
pp. 227-236
Author(s):  
Carlos Alexandre Borges Garcia ◽  
Nathalia Krissi Novaes Oliveira ◽  
Ranyere Lucena de Souza ◽  
Helenice Leite Garcia
Keyword(s):  
Urban Areas ◽  
Coastal Region ◽  
Unconfined Aquifer ◽  
Human Consumption ◽  
Northeast Brazil ◽  
The North ◽  
Physical Chemical ◽  
Shallow Wells ◽  
Most Significant Change ◽  
Sources Of Contamination

Groundwater is a large percentage of sweet easily accessible water and is often the only option for drinking water supply. In general, it possesses better quality due to interactions with the ground during percolation. In urban areas, however, various activities compromise its quality and demand, such as installation of black tanks, wastewater without treatment or with inadequate treatment, improper disposal of solid waste, waterproofing recharge areas, storage of dangerous products in underground or air tanks without basin containment, among others. The aim of this study was to evaluate the contamination of the unconfined aquifer in the North Zone of Aracaju, SE, through the analysis of physical, chemical and biological parameters of water samples from shallow wells, relating to potential sources of contamination, evaluating the effects of seasonality and comparing them to the limits of potability of Decree No. 2,914 / 2011 of the Ministry of Health, the results show that all samples were unfit for human consumption for at least one of the 13 analyzed parameters, with the most significant change in the dry season.

scholarly journals An analytical study of groundwater fluctuations in unconfined leaky aquifers induced by multiple localized recharge and withdrawal

2013 ◽  
Vol 15 (3) ◽  
pp. 394-407 ◽  
Keyword(s):  
Groundwater Flow ◽  
Numerical Models ◽  
Temporal Distribution ◽  
Neumann Boundary ◽  
Unconfined Aquifer ◽  
Flow Equation ◽  
Aquifer System ◽  
Fourier Cosine ◽  
Induced Flow ◽  
Vertical Leakage

<p>Commonly used analytical methods for assessing the effects of recharge and withdrawal on the groundwater flow system are based on an idealistic assumption that the aquifer&rsquo;s base is fully impervious. In reality, the hydrostratigraphic conditions are often complex and involve leakage induced flow between aquifer and the confining layers. In this study, a simple analytical procedure is presented for determining the spatial and temporal distribution of water head in an unconfined aquifer system due to multiple localized recharge and withdrawal at time-varying rates. A new transient function is introduced that can conveniently approximate the rising and recession limbs of any single recharge hydrograph. Solution of linearized two-dimensional groundwater flow equation under Dirichlet and Neumann boundary conditions is obtained using finite Fourier cosine transform with analytic inversion. The study has at least one clear advantage over the existing solutions that it accounts for the vertical leakage in water table buildup and drawdown analysis. A computational example demonstrates that the leakage induced flow plays an important role in recharge and withdrawal processes of unconfined aquifer system. The model results can be used for estimating aquifer&rsquo;s hydraulic properties and validation of numerical models.</p>

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