Hamid Reza Ghafouri

Hamid Reza Ghafouri
Shahid Chamran University of Ahvaz | scu · Department of Civil Engineering (Ahvaz)

PhD

About

47
Publications
7,827
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297
Citations
Introduction
Hamid Reza Ghafouri currently works at the Department of Civil Engineering (Ahvaz), Shahid Chamran University of Ahvaz. Hamid does research in Petroleum Engineering and Civil Engineering. Their current project is Developing A Petroleum Reservoir Simulator Called FARS-II". He is also engaged in other researches corresponding to Computational Hydraulics.
Additional affiliations
September 1991 - present
Shahid Chamran University of Ahvaz
Position
  • Professor (Full)
Description
  • Hydrology, Finite Element Method, Groundwater, River engineering, Flood control engineering, Concrete Dams, Fundamentals of reservoir engineering, Petroleum reservoir simulation

Publications

Publications (47)
Article
Shannon’s entropy theory measures the average uncertainty in the outcomes of an event. Since drought monitoring is an important issue, it is imperative to develop more user-friendly, modern methods for it. The present study investigates the uncertainty of the difference between monthly mean precipitation and potential evapotranspiration utilizing S...
Article
Full-text available
This study introduces a general framework for real-time leak detection in pipelines by coupling machine learning to transient hydraulics. In this framework, the performance of Support Vector Machines (SVM) as a superior pattern recognition algorithm is investigated in the experimental condition. First, a transient simulation model using the Method...
Article
Full-text available
Land subsidence susceptibility mapping is a necessary prerequisite for land subsidence management. Proper assessment of land subsidence requires determining parameters affecting subsidence to discover the spatial relationships with subsidence. For this purpose, two frameworks were prepared, according to the land site subsidence, eight parameters af...
Article
Full-text available
Two-phase flow modeling has a crucial role in detecting pollution in aquifers and/or immiscible flow simulation through porous media. In this research, a new hybrid numerical method based on the lower order non-conforming finite element method (NCFEM) and interior penalty discontinuous Galerkin (DG) method is proposed to simulate two-phase incompre...
Article
Full-text available
This article proposes a methodology to accurately monitor seawater intrusion (SWI) using time-varied GALDIT vulnerability maps. The properly produced samples are then used as input–output patterns for the approximate SWI simulation. As a novelty, the specific area of high susceptibility to SWI is proposed as the dynamic saltwater wedge position to...
Article
This study introduces a novel hybrid leak detection method based on machine learning and hydraulic transient modeling for pipe networks. First, the transient hydraulic simulation model is developed in the time domain. Then, the optimum measurement sites for sampling the network's hydraulic responses are determined using a graph-based method. The mo...
Conference Paper
This study aims at introducing a general framework for leak detection in pipelines by coupling machine learning to transient hydraulics. For this purpose, the Support Vector Machine (SVM) as a superior pattern recognition algorithm is applied to transient-based leak detection problems. First, a transient simulation model based on unsteady friction...
Preprint
This study introduces a two-stage approach for high-resolution leak localization in large-scale pipelines by coupling machine learning to transient hydraulics. The method includes two stages of leak zone identification and in-zone Leak detection. A transient simulation model using the Method of Characteristics (MOC) is developed to generate the lea...
Poster
Full-text available
All dear professors, students and other scholars in the field of water science and engineering are cordially informed that the Journal of Hydraulic Structures (JHS), as one of the leading Iranian English-language journals dedicated to the field of water science and engineering, has been launched with the cooperation and support of the Iranian Hydra...
Poster
Full-text available
All dear professors, students and other scholars in the field of water science and engineering are cordially informed that the Journal of Hydraulic Structures (JHS), as one of the leading Iranian English-language journals dedicated to the field of water science and engineering, has been launched with the cooperation and support of the Iranian Hydra...
Article
Full-text available
A realistic understanding of aquifer vulnerability to seawater intrusion is one of the important prerequisites for coastal aquifer management. The GALDIT method is a proper tool that, despite considering the qualitative, hydrogeological, and geological characteristics of the aquifer, has not considered the role of aquifer surface recharge. The Qom-...
Conference Paper
The present study deals with the issue of leak detection in water distribution networks through the machine learning approach and transient flow analysis. This research aims to present a machine learning-based method that uses the information content of transient response signals to address several issues in existing machine learning-based leak det...
Article
Full-text available
Discontinuous Galerkin (DG) methods due to their robustness properties, e.g. local conservation, low numerical dispersion, and well-capturing strong shocks and physical discontinuities, are well-suited for the simulation of Variable Density Flow (VDF) in porous media. This paper aims at introducing, in a unified format, the general class of Interio...
Article
Full-text available
The subsidence phenomenon is influenced by several factors, the most important of which is the overutilization of alluvial aquifers or reduced aquifer recharge as a result of climate change and drought. Alluvial Damaneh-Daran aquifer in central Iran is an unconfined aquifer. But due to its lithological diversity, behave similarly to a confined aqui...
Article
Full-text available
The prediction of the intrusion of saline water into coastal aquifers as a result of changing the amount of groundwater extractions is a prerequisite for managing groundwater. This study investigates the capability of different types of Support Vector Regression (SVR) models to predict salinity concentrations at the selected well in the small coast...
Article
Full-text available
In this study, we present a numerical solution for the two-phase incompressible flow in the porous media under isothermal condition using a hybrid of the linear lower-order nonconforming finite element and the interior penalty discontinuous Galerkin (DG) method. This hybridization is developed for the first time in the two-phase modeling and consid...
Article
In this research, conjunctive and integrated operation of surface and ground water resources of Behbahan plain (Maroon dam's reservoir and existing wells, respectively) was investigated. Simulation of allocation of water demands in this basin was performed by four scenarios, using WEAP software: 1) current conditions (M1), 2) reference scenario for...
Article
This study introduces a decision support system for upgrading aged water distribution mains. The network hydraulics is simulated and evaluated by a hybrid reliability measure, and the design period is divided into multiple upgrade phases. In each phase, a multiobjective optimization problem is solved to derive the trade-off between construction cos...
Article
This study introduces a decision support system for upgrading aged water distribution mains. The network hydraulics is simulated and evaluated by a hybrid reliability measure, and the design period is divided into multiple upgrade phases. In each phase, a multiobjective optimization problem is solved to derive the trade-off between construction cos...
Article
Full-text available
Water resources systems should be operated to balance multiple conflicting objectives accounting for a variety of services. In this field, the evolutionary algorithms are very helpful since complex simulation models can be directly embedded within them, and they are also powerful for deriving the trade-off among conflicting objectives in multi-obje...
Article
Purpose The purpose of this paper is to present detailed algorithms for simulation of individual and group control of production wells in hydrocarbon reservoirs which are implemented in a finite volume-based reservoir simulator. Design/methodology/approach The algorithm for individual control is described for the multi-lateral multi-connection o...
Article
Full-text available
In the present study, a new technique in Discrete Least Squares Meshless method; DLSM; has been adopted for stress assessment of two-dimensional elastic domains including a non-growing crack. DLSM is a real meshless method that does not require mesh both in approximation step and in numerical integration step of the solution procedure due to the us...
Article
Background and objectives: Groundwater is one of the most valuable water resources owing to its quantity and quality. Measuring water level is a basic and essential step in any groundwater study. Since the measured data are derived only from a limited number of observation points and, at the same time, they must be extended to the whole surface of...
Article
Full-text available
In this research, the trends of degradation of stiffness and compressive strength of mass concrete of the Dez concrete arch dam, over time have been evaluated using a new and robust method. In previous studies of the corresponding author, he was successful to estimate the degradation of the stiffness of dam’s concrete at the end of a selected time...
Article
Background and objectives : Coastal aquifers are of the most important freshwater resources in many countries, especially in arid and semi arid zones. Due to the proximity and contact with the sea, and thus the threat of contamination because of the seawater intrusion, management and protection of these freshwater resources are quite necessary. The...
Article
A simulation-optimization model is proposed for identifying the characteristics of local immiscible NAPL contaminant sources inside aquifers. This model employs the UTCHEM 9.0 software as its simulator for solving the governing equations associated with the multi-phase flow in porous media. As the optimization model, a novel two-level saturation ba...
Article
Full-text available
The operation of pumps imposes significant costs on a water distribution system for energy supply and pumps maintenance. To derive an optimum pumps scheduling program, this study presents a multiobjective optimization problem with the objective functions of 1- energy cost and 2- the number of pump switches. The optimization of both objective functi...
Article
The present paper aims to evaluate a class of discontinuous Galerkin methods for modeling of coupled flow and mass transport equations in porous medium. Various combinations of primal discontinuous Galerkin methods were used for discretization of the coupled nonlinear system of flow and mass transport equations in a saturated porous medium and a fu...
Article
If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.com Emerald is a glo...
Article
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In this article, a numerical solution of incompressible two-phase flow in isothermal condition, based on wetting pressure-wetting saturation formulation (Pw,Sw) using high order primal discontinuous Galerkin (DG) methods is considered which can capture the shock fronts of two-phase flow in heterogeneous porous media. In this presented model, the ve...
Conference Paper
Full-text available
Together with growth in population and urban expansion, water distribution networks should be upgraded. In the traditional design of WDNs, the assumption is that the network layout on the planning horizon arises in year zero, while in reality, the expansion of cities is done gradually through the phasing of construction. Considering this fact in th...
Article
Full-text available
Purpose – The purpose of this paper is to present a novel sequential implicit discontinuous Galerkin (DG) method for two-phase incompressible flow in porous media. It is based on the wetting phase pressure-saturation formulation with Robin boundary condition (Klieber and Riviere, 2006) using H(div) velocity projection. Design/methodology/approach –...
Article
Purpose – The purpose of this paper is to present an efficient improved version of Implicit Pressure-Explicit Saturation (IMPES) method for the solution of incompressible two-phase flow model based on the discontinuous Galerkin (DG) numerical scheme. Design/methodology/approach – The governing equations, based on the wetting-phase pressure-satur...
Article
Purpose – The purpose of this paper is to present a novel sequential implicit discontinuous Galerkin (DG) method for two-phase incompressible flow in porous media. It is based on the wetting phase pressure-saturation formulation with Robin boundary condition (Klieber and Riviere, 2006) using H(div) velocity projection. Design/methodology/approach...
Article
Full-text available
Purpose – The purpose of this paper is to present a detailed algorithm for simulating three-dimensional hydrocarbon reservoirs using the blackoil model. Design/methodology/approach – The numerical algorithm uses a cell-centred structured grid finite volume method. The blackoil formulation is written in a way that an Implicit Pressure Explicit Satu...
Article
Full-text available
Different regulations for the design of concrete dams suggest various criteria for stability control of dams. Some of these criteria, which are conservative, lead to the over-design of dam sections. By using the finite element method, which is considered more accurate than many, this research is intended to determine the accuracy of approximate met...
Article
Full-text available
A computational model simulating the behavior of the concrete subjected to the high temperature environment has been presented here by means of micro-planes framework. The constitutive equations using damage formulations developed earlier by (Labibzadeh and Sadrnejad, 2006) have been adapted here to account for the effects of elevated temperatures....
Article
Full-text available
Estuaries are main water resources for various drinking, agricultural and industrial purposes in coastlines. With increasing water demand in these areas, the discharge of industrial and municipal wastewater into rivers and estuaries has increased. On the other hand, seawater intrusion into estuaries has decreased water quality which becomes more se...
Article
Based on the theory of double-porosity, a novel mathematical model for multiphase fluid flow in a deforming fractured reservoir is developed. The present formulation, consisting of both the equilibrium and continuity equations, accounts for the significant influence of coupling between fluid flow and solid deformation, usually ignored in the reserv...
Article
The mathematical base of the double porosity concept, consisting of the continuity and equilibrium equation respectively, is briefly reviewed. A quasi-steady-state transfer function, the so-called leakage term, is used. Important aspects of the developed code, based on the double porosity theory, are presented together with two hypothetical example...

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Projects (2)
Project
I am reseaching on the subject of my Ph.D. thesis.