siamak Boudaghpour - Academia.edu (original) (raw)

Papers by siamak Boudaghpour

Journal of environmental health science & engineering, Dec 1, 2014

High flood occurrences with large environmental damages have a growing trend in Iran. Dynamic mov... more High flood occurrences with large environmental damages have a growing trend in Iran. Dynamic movements of water during a flood cause different environmental damages in geographical areas with different characteristics such as topographic conditions. In general, environmental effects and damages caused by a flood in an area can be investigated from different points of view. The current essay is aiming at detecting environmental effects of flood occurrences in Halilrood catchment area of Kerman province in Iran using flood zone mapping techniques. The intended flood zone map was introduced in four steps. Steps 1 to 3 pave the way to calculate and estimate flood zone map in the understudy area while step 4 determines the estimation of environmental effects of flood occurrence. Based on our studies, wide range of accuracy for estimating the environmental effects of flood occurrence was introduced by using of flood zone mapping techniques. Moreover, it was identified that the existence of Jiroft dam in the study area can decrease flood zone from 260 hectares to 225 hectares and also it can decrease 20% of flood peak intensity. As a result, 14% of flood zone in the study area can be saved environmentally.

Journal of environmental health science & engineering, Apr 17, 2015

Estimation and water prediction of the infiltration of rainfall has been always an important task... more Estimation and water prediction of the infiltration of rainfall has been always an important task for hydrologists. Richard equation is adopted as a fundamental equation to develop a storage function model. At first stage, a new boundary condition has been introduced and its accuracy has been cross checked with experiments. In the second stage, on the lumping process of non-dimensional form of Richard equation, a compensation factor has been proposed to equalize the semi-lumped equations. Finally the relation between storage and discharge has been achieved by fully lumped equation.

Ain Shams Engineering Journal, Jun 1, 2022

International Journal for Numerical Methods in Engineering, 2014

ABSTRACT High Order Numerical Manifold Method (HONMM) is a powerful method to solve static proble... more ABSTRACT High Order Numerical Manifold Method (HONMM) is a powerful method to solve static problems. A development of HONMM to achieve a dynamic solution with high accuracy and less computational cost is addressed in the current paper. In the developed method, the global approximation is obtained through increasing the order of local approximation functions without any Linear Dependence (LD) of the unknowns. The weighted residual formulations are modified to be used in dynamic high order simulation. Moreover, a modified Newmark method formulation is adjusted for time integration of high order equations. The superiority of the proposed method over the conventional NMM is demonstrated through a special beam example. The dynamic free fall block example is used to exhibit the removal of mass matrix singularity. As cases of dynamic analysis, beam free and forced vibrations are illustrated which include a moving load. Finally, a non-uniform cross-section beam under dynamic variable loads with accelerated motion is solved while demonstrating the capability of the new method such as simplicity, accuracy and time efficiency for simulation of complex dynamic problems. Copyright © 2014 John Wiley & Sons, Ltd.

Novel technologies and subsequent pollutions are serious threats to the environment and public he... more Novel technologies and subsequent pollutions are serious threats to the environment and public health. The environmental pollutions, especially air pollution, are currently leading environmental concerns in developing countries, including Iran. In the present study, the air quality and meteorological data were employed to achieve potent models based on an Artificial Neural Network (ANN) for the prediction of air pollution in Tehran, Iran. The developed models manage to predict daily concentrations of various air pollutants such as O3, PM10, NO2, CO, and PM2.5. The required data were collected daily through the Air Quality Organization from all air quality stations of Tehran within a four-year period (from 2012 to 2015). Training the models was on the basis of Multi-Layer Perceptron (MLP) with the Back Propagation (BP) algorithm using MATLAB program. The results indicated appropriate agreement between the observed and predicted concentrations, as the values of the coefficient of mult...

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Journal of Environmental Health Engineering, 2015

Background & Objectives: Nowadays, antibiotic residue presence in environment is a world concern,... more Background & Objectives: Nowadays, antibiotic residue presence in environment is a world concern, so there discharge control necessity is unavoidable. The objective of this research was the study of Tetracycline removal from aqueous solution by Nano Zero Valent Iron/UV/H2O2 process. Methods: This research was a lab-scale experimental study that conducted in laboratory temperature. Synthetics wastewater with concentration of 15, 30, 45, and 60 mg/l prepared from stock solution (500 mg/l). The effect of operational parameters such as pH, nano zero valent iron concentration, Tetracycline antibiotic concentration , UV Radiation , H2O2 concentration and contact time determined by one at a time method. Tetracycline antibiotic concentrations determined by UV-HPLC equipment and COD variation analyzed during the study.

PROCEEDINGS OF HYDRAULIC ENGINEERING, 1995

The Richards equation is adopted as a fundamental equation for the solution of unsaturated infilt... more The Richards equation is adopted as a fundamental equation for the solution of unsaturated infiltration flow. At the first stage, a new boundary condition has been introduced and its accuracy has been cross checked with experiments. At the second stage, on the lumping process of non-dimensional form of Richards equation, a compensation factor has been proposed to equalize the semi-lumped equations. Finally, the relation between storage and discharge has been achieved by fully lumped equations.

Journal of Membrane Science, 2007

ABSTRACT

DESALINATION AND WATER TREATMENT, 2021

In this study, the potential of layered double hydroxide (Zn-CoAl) decorated with g-C 3 N 4 (CN) ... more In this study, the potential of layered double hydroxide (Zn-CoAl) decorated with g-C 3 N 4 (CN) as a novel nanocomposite for degradation of Congo red (CR) under ultrasonic irradiation was evaluated. Characterization studies including transmission electron microscopy, scanning electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller, Fourier-transform infrared spectroscopy and ultraviolet-visible diffuse reflectance spectroscopy (UV-Visible DRS) were conducted to study the structure of synthesized nanocomposite. Such characteristics as an open hierarchical structure comprised of intertwined CN and Zn-Al-Co-LDH nanosheets make it an efficient photocatalyst for the removal of anionic pollutants from water under simulated sunlight irradiation. The degradation efficiency of Congo red (CR) with Zn-Al-Co-LDH@CN catalyst was 92.7%. Regarding the effect of scavengers on the dye, ethylenediaminetetraacetic acid had a higher value than ethanol and benzoquinone (BQ) implying the considerable role of the hole (h +) in decomposing CR compared to the insignificant role of OH • and O 2 •. During five sequential runs, a decline of less than 10% was observed in the removal efficiency of CR. The removal efficiency of chemical oxygen demand and total organic carbon was approximately 71% and 52%, respectively, within 400 min confirming the mineralization of CR.

Introduction: The presence of antibiotics in drinking water negatively affects human health. The ... more Introduction: The presence of antibiotics in drinking water negatively affects human health. The present study aimed at improving the adsorption performance of tetracycline (TC) by adjusting biomaterial with MnMoO4, which is emanated from aerobic algae. Methods: This is a fundamental and applied study in which Algae biochar composite and manganese molybdate as the effective adsorbents in the removal of tetracycline antibiotics were used. This study has some objectives, which are as follows: (a) characterizing composite (biochar modified by MnMoO4), (b) preparing an effective adsorbent for TC evacuation and giving a potential specialized help for TC wastewater treatment under different experimental conditions through altering operational parameters, namely catalyst dosage, pollutant concentration, initial pH of the solution, and (c) concluding adsorption mechanisms, kinetic and equilibrium models that were employed in the experimental data. Results: The results indicated that The m...

Recently, the public has become more aware of the environmental problems facing our planet today.... more Recently, the public has become more aware of the environmental problems facing our planet today. Underground water pollution is one of these problems, and it requires serious attention. As a result, many studies have been performed to examine the movement of water within soil. These studies present many new models for determining soil water retention rates. It is essential that these models be investigated for accuracy and applicability. This study attempts to analyze three of these well-known water retention models: Campbell, Saxton, and Huston-Cass. To analyze these models, the pressure plate test (ASTM C199-09) was performed on soil samples with different soil textures and from different geographical locations within the country of Iran. Using these results, the general applicability of each model was measured using the 1:1 slope line correlation method. In addition, the accuracy and applicability of each model was measured by calculating the Root Mean Square Error (RMSE) and th...

Rivers can absorb certain amounts of contamination relying on different factors such as: river di... more Rivers can absorb certain amounts of contamination relying on different factors such as: river discharge, the primary conditions of the river, the river depth, discharge and the river viscosity of the offloaded wastes in the river. From parameters of water quality point of view, it is recom-mended to determine some parts of the river which are lower than the standard level in order to find out the critical parts and suitable alternatives for simplifying the critical points. According to the above- mentioned topics, it is essential to identify the parts of the river which do not have standard conditions and also to determine the sources of pollutions that highly influence such conditions and to explore appropriate solutions. This essay provides the effect of polluting sources on the changes of dissolved oxygen and temperature in Ghezel-Ozen River based on the gathered qnalitative and qnalititative data. Since the required information is extensive for being modeled by QUAL2E software ...

Environmental Technology & Innovation, 2020

In this study, the effect of different irrigation levels on oleuropein content of olive (Olea eur... more In this study, the effect of different irrigation levels on oleuropein content of olive (Olea europaea L. cv. Memecik) was researched in the Aegean Region during the crop season of 2007. Six different irrigation water levels of drip irrigation were tested using class A pan evaporation technique [I 0 (kpc:0), I 0.25 (kpc:0.25), I 0.50 (kpc:0.50), I 0.75 (kpc:0.75), I 1.00 (kpc:1.00) and I 1.25 (kpc:1.25)]. Oleuropein contents of olive leaves were detected by high performance liquid chromatography (HPLC). Olive leaves showed considerable contents of oleuropein (16.25 ± 0.25%) collected from waterless regime applied trees during summer period. In the same regime, contents of oleuropein were decreased depending upon the increasing irrigation regimes: 0.25 (10.28 ± 0.13%); 0.50 (2.19 ± 0.12%); 0.75 (1.43 ± 0.03%); 1.00 (0.09 ± 0.05%), although in winter period, contents of oleuropein were approximately stable as 0.55 ± 0.01% in waterless regime (rain-fed olives), equal in 0.25 (0.25 ± 0.04%) and 0.50 (0.25 ± 0.01%), in 0.75 (0.21 ± 0.01%), 1.00 (0.16 ± 0.02%) and (0.14 ± 0.03%) in 1.25 irrigation regimes. Contents of oleuropein was observed to be increased inversely proportional with increased irrigation regimes in autumn period. The oleuropein values were 1.21 ± 0.01% in waterless, 0.76 ± 0.01% in 0.25 irrigation, 0.45 ± 0.03% in 0.50 irrigation, 0.44 ± 0.03% in 0.75 irrigation, 0.33 ± 0.01% in 1.00 irrigation and 0.25 ± 0.02% in 1.25 irrigation regimes. No important increase or decrease between contents of oleuropein depending upon the gradually increased irrigation regimes was observe in spring period [in waterless regime (0.51 ± 0.05%), 0.25 irrigation (0.39 ± 0.04%); 0.50 irrigation (0.38 ± 0.14%); 0.75 irrigation (0.11 ± 0.01%); 1.00 irrigation (0.55 ± 0.04%); and 1.25 irrigation (0.79 ± 0.06%)]. Statistically important increases in oleuropein contents were in inverse proportion with the exponential irrigation regimes.