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Elucidation of vulnerability of groundwater quality to agriculture and surface runoff
Published in Manish Kumar, Sanjeeb Mohapatra, Kishor Acharya, Contaminants of Emerging Concerns and Reigning Removal Technologies, 2022
Koushik Singha Roy, Johnson Christian, Dharmik Vyas
Kumar … Singh (2011) worked on the “MODFLOW” model that simulates flow, surface runoff, and leaching of nutrients. Qiu et al. (2015) worked on “GMS” model which was the variant of “MODFLOW” model. A unique model “FEFLOW” simulates flow of groundwater which depends on density-dependent groundwater flow along with the mass and heat transport process of the contaminants (Diersch, 2013). Kumar (2012) worked on “CHEMFLOW” model that describes the mobility of chemical contaminants. Although these models are unique in nature, having some limitations and further modifications and improvement is required in order to simulate the mobility of contaminants in better manner (Portmann et al., 2009; Shiu et al., 2012; Kruse and Eslamian 2017; Dirnböck et al., 2016; Liu et al., 2016).
Simulation Optimization Models for Groundwater Management
Published in M. Thangarajan, Vijay P. Singh, Groundwater Assessment, Modeling, and Management, 2016
T.I. Eldho, Boddula Swathi, Partha Majumdar
FEMWATER is a software package of the groundwater modeling system (GMS) for different groundwater flow and transport modeling in 2D and 3D (www.epa.gov). FEFLOW is a software package for modeling of different groundwater flow and transport processes in 2D and 3D (www.feflow.info).
Co-simulation of district heating systems and borehole heat exchanger arrays using 3D finite element method subsurface models
Published in Journal of Building Performance Simulation, 2022
Julian Formhals, Bastian Welsch, Hoofar Hemmatabady, Daniel O. Schulte, Lukas Seib, Ingo Sass
The interface proposed in this paper facilitates co-simulation of DH systems in Modelica and heat transport as well as groundwater flow in FEFLOW. Modelica was chosen for the modelling of the DH system since it is a flexible and efficient physical modelling language (Wetter 2019). The acausal modelling approach allows for consideration of aspects such as the reversal of flow through pipes, which is an important feature for the modelling of thermo-hydraulic energy systems. FEFLOW is a tool for simulation of subsurface heat and mass transport, which is frequently used for the simulation of geothermal systems and includes important features, such as validated BHE models (Diersch et al. 2011a). The approach introduced in Formhals et al. (Welsch et al. 2017) is implemented using components from MoBTES (Formhals et al. 2020) a Modelica toolbox for the simulation of BTES systems, utilizing the two different causality options proposed by Diersch et al. (2011b) and Hu et al. (2020).
Simulated groundwater dynamics and solute transport in a coastal phreatic aquifer subjected to different tides
Published in Marine Georesources & Geotechnology, 2021
Xiaohua Huang, Guodong Liu, Chengcheng Xia, Mengxi Yang
In coastal areas, especially in the offshore zone, transformation between the zone of unsaturation and saturation is frequent due to the shallow depth of the groundwater level. The concentrations of seawater and pollutants are also relatively high, and any changes in those concentrations could affect the density of the liquid (Xue and Wu 2010). Thus, the influence of changes in density and saturation on groundwater flow and solute transport in coastal zones should be considered in simulations. The BIOMARUN, SUTRA-MS, and FEFLOW models are often used to simulate solute transport in beach aquifers. The model BIOMARUN couples the model MARUN, which is a 2 D finite element model for density-dependent flow and solute transport in variably saturated media (Boufadel, Suidan, and Venosa 1999), with the model BIOB, a multiplicative Monod model for low-solubility hydrocarbon biodegradation (Geng et al. 2014 Geng et al. 2015,). The model SUTRA-MS is a version of SUTRA modified to simulate heat and multiple-solute transport (Hughes and Sanford 2005; Hughes, Vacher, and Sanford 2007; Kiro et al. 2012). The model FEFLOW is a finite-element package for simulating 3 D and 2 D fluid density-coupled flow, contaminant mass, and heat transport in the subsurface based on the transport of one solute. Many file formats, including the .shp file of ArcView and ASCII, can be directly transferred and exported to analyze the results (Sorek and Pinder 1999; Zhao et al. 2005).