
Hossein Mohammad Vali SamaniShahid Chamran University of Ahvaz | scu · Department of Civil Engineering (Ahvaz)
Hossein Mohammad Vali Samani
PhD
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107
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Publications (107)
The development of agricultural, industrial, and urban activities creates an increase in pollution loading in rivers that may violate water quality standards which in its turn results in damages to the river systems. An efficient model of waste-load allocation plays a significant role in improving the water quality of the rivers. In this paper, a c...
In this study, optimal designs with minimum costs are obtained for various storm return periods. Then the risk analysis is used to determine the return period in which the design cost plus the damage risk cost is minimum. SWMM software was used to handle the simulation and the Network optimization was performed by using the genetic algorithm. The n...
In this study, the risk analysis is used to determine the return period in which the design cost plus the damage risk cost is minimum. The damage includes the roads and traffic, the lawn areas, and the residential and commercial buildings. The traffic damage is based on two factors, time of delay and social negative impacts. The nonlinear reservoir...
he optimal managment of pollutants discharged into the rivers plays a critical role in improving water quality. In this paper, a new method is developed for Cost-based waste-load allocation (C-WLA) modeling with trade-off between the cost of treatment at loading points and the loss of pollution at the points of withdrawal from the river system. For...
In this study, optimal designs with minimum costs are obtained for various storm return periods. Then the risk analysis is used to determine the return period in which the design cost plus the damage risk cost is minimum. SWMM software was used to handle the simulation and the Network optimization was performed by using the genetic algorithm. The n...
The purpose of this study is to investigate the effect of meteorological drought on groundwater resources in
Varamin plain. For this purpose, the effect of meteorological drought was investigated through standard
precipitation index (SPI), NISTOR index and groundwater source index (GRI). Therefore, in order to evaluate
the effect of climatic parame...
The leak detection parameters in the inverse transient analysis (ITA) are obtained in an inverse approach by solving a nonlinear programming problem using metaheuristic algorithms such as the genetic algorithm (GA). Despite its high capability in deriving the leak detection parameters, the ITA method is computationally complex and costly as it uses...
In this research, a number of paired three-dimensional Atmosphere-Ocean General Circulation Models (AOGCM) from CMIP (Climate Model Inter Comparison Project) 5 group with the base period of 1989–2005 have been evaluated and the output of these models was micro-scaled and calibrated by LARS-WG software. The appropriate model was selected to simulate...
The inverse transient analysis (ITA) is a well-known leak detection method for pressurized piping systems. In this method, unknown parameters of the number, location, and size of leakages are obtained through solving a nonlinear programming problem using an optimization technique. Both transient analysis and optimization are time consuming and make...
The paper presents a new approach to identify the unknown characteristics (release history and location) of contaminant sources in groundwater, starting from a few concentration observations at monitoring points. An inverse method that combines the forward model and an optimization algorithm is presented. To speed up the computation, the transfer f...
The inverse transient analysis (ITA) method is amongst the successful leak detection methods in water distribution networks. However, determining the unknown leakage parameters such as number, location, and area of leakages is computationally time-consuming and costly due to applying metaheuristic algorithms, like the genetic algorithm (GA). This s...
The aim of this study was to investigate the Intensity of the effect of climate change on groundwater resources in Varamin plain using CMIP5 group models under RCP release scenarios. The output of these models was downscaled by LARS-WG software. For this purpose, the period 1989-2005 was used as a base period to select the regional model and the pe...
Tracer experiments are very important in the studies related to aquifer contamination pollution for determining of dispersion coefficient. In this study, the effect of sampling method on the dispersion coefficients of two simulated sandy aquifers was examined. The physical model was made from Plexiglas material with inner length, width and height o...
Transient flows naturally occur in piping systems due to operation exigencies. It is، therefore، essential to analyze water distribution networks under transient flow conditions in an attempt to enhance their reliability. The accuracy of such an analysis highly depends on such input parameters as pipe wall roughness، wave speed، and unsteady fricti...
Transient protection is an important issue in pipeline design. As protective devices impose a huge cost on the project, it is better and more efficient to use optimization models for determination of their position and type with the aim of cost reduction. Except for the cost, the other important issue in obtaining the number and locating of protect...
This paper investigates the frequency response method (FRM) for analyzing waterhammer phenomenon in looped pipe networks. Traditionally, the unsteady flow governing equations are solved in the time domain using the method of characteristics (MOC). The governing equations can also be solved in the frequency domain using the transfer matrix method. F...
One of the major challenges in designing under pressure water transmission pipeline is the system protection against water-hammer pressures due to a pump trip. The best strategy is to use air-chamber; which imposes considerable costs. To mitigate the air-chamber volume, the use of air-inletvalvesis also suggested. Determination of air-chamber volum...
This paper presents a framework for the optimal design of a storm sewer network in flat areas where there is insufficient energy from gravity for runoff drainage. A reliability index based on nodal partial flooding is introduced as a performance criterion and utilizes the intrinsic storage capacity of the sewer network. The Storm Water Management M...
Air-chambers are mechanical devices capable of decreasing positive and increasing negative water-hammer pressures in pumping pipelines; however, large size air-chambers might increase the costs substantially. Also, air-inlet valves are powerful devices which can efficiently control negative pressures. Obtaining the best protection scheme where tran...
This paper introduces a methodology for soil slope stability analysis based on optimization, limit equilibrium principles and method of slices. In this study, the slope stability analysis problem is transformed into a constrained nonlinear optimization problem. To solve that, a Self-Adaptive Genetic Algorithm (GA) is utilized. In this study, the sl...
This study introduces a simulation-optimization model for deriving an operating policy for multireservoir systems. Two adjustable monthly rule curves are introduced to each reservoir in the system. The applied rule curves divide the reservoir volume into three zones in each within-year period. For each zone, a release coefficient is specified to in...
In this research, a flood control operation policy based on a simulation–optimization model is developed for minimizing flood damage downstream of multi-reservoir systems by using spillway gates. The operation policy is based on a multistage method used to control floods of various magnitudes in reservoirs with gated spillways. In this operation po...
This paper presents a method concerning the integration of the Benefit/Cost analysis and the real genetic algorithm with various elements of reservoir dam design. The version 4.0 of HEC-RAS software and Hydro-Rout models have been used to simulate the region and flood routing in the reservoir of the dam, respectively. A mathematical programming has...
This paper presents a method concerning the integration of the benefit/cost analysis and the real genetic algorithm with various elements of reservoir dam design. The version 4.0 of HEC-RAS software and Hydro-Rout models have been used to simulate the region and flood routing in the reservoir of the dam, respectively. A mathematical programming has...
This study was carried out to determine the error rate of using two-dimensional models in calculating the hydrodynamic pressure of the earthquake-induced body of the dams. First, using the finite volume method and considering compressibility and turbulence phenomena, three-dimensional Navier Stokes equations were solved for 1380 three-dimensional r...
Inverse Transient Analysis (ITA) is a powerful approach for leak detection of pipelines. When the pipe transient flow is analyzed in frequency domain the ITA is called Inverse Frequency Response Analysis (IFRA). To implement an IFRA for leak detection, a transient state is initiated in the pipe by fast closure ofthe downstream end valve. Then, the...
The interbasin water transfer is a remedy to mitigate the negative issues of water shortage in
arid and semi-arid regions. In a water transfer project the receiving basin always benefits
while, the sending basin may suffer. In this study, the project of interbasin water transfer
from Dez water resources system in south-west of Iran to the centra...
Release of pollution into rivers is required to be handled with special consideration to environmental standards. For this purpose, it is essential to specify the contribution of each pollution source in contamination of water resources. In this study, a mathematical model is proposed for determining locations and concentration release histories of...
Optimization of water distribution networks with multi-reservoirs using genetic algorithm is studied. Decision variables are pipe diameters and inlets discharges which are provided by the reservoirs. The constraints consist of upper and lower bounds of pipe sizes, flow velocities, and inlet discharges. The objective function which should be minimiz...
Advection-diffusion equation and its related analytical solutions have gained wide applications in different areas. Compared with numerical solutions, the analytical solutions benefit from some advantages. As such, many analytical solutions have been presented for the advection-diffusion equation. The difference between these solutions is mainly in...
Since choosing Manning roughness coefficient suffers from subjectivity, a precise estimation of roughness coefficients remains as one of the most challenging tasks in open channel flow study. The main objective of the present research is to propose an efficient technique for estimation of Manning coefficients at various reaches of rivers. This pape...
Optimal design of tunnels and surge tanks is a major concern in the implementation and operation of large hydropower plants, particularly those in which tunnels are long and water hammer is likely. In this paper, flow simulation and an optimization process have been linked in an iterative manner to develop a general model for the optimal design of...
Behavior of turbulent jet is relying on jet parameters, environmental and geometric parameters. In this research, it has attempt to Study effect of jet parameters of internal angle on maximum effective length and velocity on centerline from nozzle experimentally. Toward this end, four internal angles 30, 45, 60 and 90-degree are considered for this...
The horseshoe and D-Shape cross sections are found in many diversion tunnels. In this research physical equations of these cross sections were investigated. Meanwhile, by differentiating of Manning equation the depth of maximum velocity and discharge was assigned. In addition, dimensionless graphs were presented by which area, perimeter and water s...
This paper introduces a method for optimal design of water distributionnetworkswith desired reliability. The design approach consists of two steps: the first step involves an algorithm in which pipe flows are so distributed that the variance of flows is minimized and the second step uses a non-linear optimization formulation to obtain a global opti...
The horseshoe and D-Shape cross sections are found in many diversion tunnels. In this research physical equations of these cross sections were investigated. Meanwhile, by differentiating of Manning equation the depth of maximum velocity and discharge was assigned. In addition, dimensionless graphs were presented by which area, perimeter and water s...
Optimization of water distribution networks has been of central importance for recent decades. Genetic Algorithms (GA) are
the most famous metaheuristics widely used for this purpose with great success. However, the fact that GA basically requires
a large number of computations, has led to investigate for faster solvers. In this research, a new app...
The problem of selecting the best arrangement for the pipe diameters and the optimal pumping head so as the minimal total cost to be produced, has received considerable attention many years ago by the engineers who study hydraulic works. In this study, a mixed integer linear programming (MILP) model is presented for optimization of pressurized bran...
The objective of the present study was to understand Phosphorus transport from soil columns at different water flux densities and to compare computer simulation results using HYDRUS-3D and the physical model against column-experiment data. Towards that end, two water flux densities (0.0075, 0.0065 m sec<SUP>-1</SUP>) and P concentration rates (33 m...
Better understanding of transport of dissolved chemicals in soils and aquifers is important to evaluate and remediate contaminated soils and aquifers. Solute dispersivity defined from the classical advective-dispersive equation (ADE) was found to increase as the length of a soil column or the soil depth increased. The heterogeneity of soil is a phy...
The Muskingum method is one of the common hydrologic flood routing methods for rivers. The method is simple but its application is restricted to single reach problems. In order to apply this method for a certain reach two basic parameters should be determined first. These parameters are usually estimated by using trial and error combined with a cur...
Phosphorus (p) adsorption characteristics of 5 soil samples were studied in soils of Southeastern Iran during 2009/2010 cropping season. Some soil properties as well as selected P-adoption characteristics were studied in these soils, Results show for this study Freundlich adsorption isotherm has good match with phosphorus adsorbed data and has good...
In this study, optimal design of municipal water distribution networks is determined by the mixedinteger real linear programming technique. The method is capable of rapidly obtaining the discrete characteristics of commercially available pipe sizes, pumps and reservoir heights. The hydraulic and optimisation analyses are linked through an iterative...
Cohesive sediment transport remains a complicated subject that hydraulic engineers are frequently faced with in water-related engineering problems. This is primarily affected by the macroscopic aspects of water-sediment system characteristics. In this paper a 1-D mathematical model was developed to be employed in predicting the cohesive sediment tr...
To evaluate the minimization of reservoir sedimentation, an optimal control methodology was developed. The sedimentation problem in reservoirs was simulated by GSTARS3, one of the newest versions of GSTARS series to simulate river and reservoir sedimentation. GSTARS3 was coupled with an optimization methodology to minimize the reservoir sedimentati...
Tracer experiments are very important in the studies related to aquifer contamination for determination of dispersion coefficient. In this study, the effect of sampling method on the dispersion coefficients of two simulated sandy aquifers was examined. The physical model was made from Plexiglas material with inner length, width and height of 72, 10...
Over the past decade, sedimentation and self-weight consolidation of cohesive sediments in dam reservoirs, especially those close to the hydropower intakes and in harbours, has been recognized as a serious problem. Removal of these sediments by dredging and sediment flushing requires knowledge of the properties of the deposited sediment; hence usin...
Fried-Combernous and Brigham models are two of the important models for nonreactive contaminant transport in saturated, homogeneous porous media under steady-state uniform flow. These models are proposed for computing dispersivity in long and short distances respectively. In this research, dispersivity of coarse and medium homogeneous sands is inve...
In this study optimum design of municipal water distribution networks for a single loading condition is determined by the branch and bound integer linear programming technique. The hydraulic and optimization analyses are linked through an iterative procedure. This procedure enables us to design a water distribution system that satisfies all require...
Dispersivity is a measurable property of a geologic system and one of the parameters of advection-dispersion equation. In this research, the dependence of dispersivity on soil thickness is investigated in coarse and medium homogeneous sands. Experiments were carried out in a rectangular laboratory-scale Plexiglas tank, 0.72 m long, along which the...
For flood control and watershed management a model simulating the hydraulics of flow through rockfill dams is necessary. This paper describes a model for flow through rockfill dams. In the model, velocity has been introduced to the 1-D continuity equation as an exponential relationship between Reynold’s number (Re) and Darcy–Weisbach coefficient (f...
In this study, a multilinear Muskingum method is presented for hydrologic routing through circular conduits. In order to increase accuracy, the reference discharge is assumed to be a nonlinear function of conduit diameter, Manning coefficient, bed slope, and peak discharge of the inflow hydrograph. The reference discharge function has been determin...
In this paper a two-dimensional (2D) model for flow through rockfill dams is presented and its results have been compared to ID model. The model is based on the 2D continuity equation. In the model, an exponential relationship between Reynolds number (R) and Darcy-Weisbach coefficient (f) is suggested and combined with the continuity equation. Coef...
In this study, a computer program is developed which enables us to design a water distribution system which satisfies all constraints including pipe diameters, low velocities, and nodal pressures with a minimum total cost. The hydraulic analysis of the water distribution system is performed by the Newton-Raphson method. This analysis is coupled wit...