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  • دکتری (1376)

    مهندسی عمران

    دانشگاه بیرمنگام، بیرمنگام، انگلستان

  • کارشناسی‌ارشد (1368)

    مهندسی آبیاری و زهکشی

    دانشگاه تهران، تهران، ایران

  • کارشناسی (1364)

    مهندسی آبیاری

    دانشگاه شهید چمران اهواز، اهواز، ایران

  • اكوهيدروليك و اكوهيدروديناميك
  • مكانيك و مهندسي روخانه-مهندسي رسوب

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    رزومه

    Hydrodynamic Performance of Triangular Winged Bandal-like Structure in a 180-degree Bend

    Abdollah Sardasteh, M Shafai Bejestan, SA Ayyoubzadeh, J MV Samani
    Journal PapersJournal of Agricultural Science and Technology , Volume 23 , Issue 3, 2021 May 10, {Pages 737-749 }

    Abstract

    This experiment was conducted in order to determine the hydrodynamic performance of a Triangular Winged Bandal-Like (TWBL) structure, which is a combination of the Bandal-Like (BL) structure and Triangular Vane (TV). For the purposes of this study, the JFE ALEC magnetic velocity meter was used to measure the three components of flow velocity under non-submerged hydraulic conditions at a Froude number of 0.24. The three considered cases for this measurement were the non-structured case and the BL and TWBLs. The results showed that the flow deviation occurred through the impermeable upper part of both structures towards the middle of the channel. At downstream of both structures, bubbling flows were caused by the collision of upward flows wit

    Introducing and Evaluating a New Model of Rotary Reactor in Nitrate Removal from Aqueous Environments by Electrocoagulation Method

    S Riahi, SA Ayyoubzadeh, H Samadi-Boroujeni, Gh Moussavi
    Journal PapersJournal of Health , Volume 11 , Issue 1, 2020 April 10, {Pages 88-99 }

    Abstract

    Background & objectives: Nitrate contamination of drinking water is a common problem in many parts of the world that poses a serious threat to public health and environment. In this research, the performance of a new rotary electrocoagulation reactor model for removal of nitrate in presence or absence of turbidity has been investigated.Methods: In this study, aluminum and iron electrodes were analyzed in parallel and monopolar arrangement. At each test time, a sample of 370 liters was prepared and the effects of operating parameters such as initial nitrate concentration, current density, annular reactor speed, optimum time, electrode materials and presence of turbidity on nitrate removal were evaluated.Results: The results indicated that th

    Evaluation of Rotary Reactor Model Performance to Removal Turbidity from Aqueous Environments by Electrocoagulation Method

    Saleh Riahi, Seyed Ali Ayyoubzadeh, Hossein Samadi-Boroujeni, Gholamreza Moussavi
    Journal PapersJournal of Environmental Health Enginering , Volume 7 , Issue 2, 2020 February 10, {Pages 195-210 }

    Abstract

    Background & Objectives: One of the most important problems facing the water treatment plants is seasonal turbidity removal from the drinking surface waters. In this work, the efficiency of turbidity removal from water surface has been studied using a batch rotary reactor model and electrocoagulation process and different electrodes including iron and aluminum were tested. Finally, the optimum values of the studied parameters were evaluated at different operating conditions.Methods: In order to eliminate the turbidity from drinking water, the discontinuous rotary reactor model with monopolar electrodes was used in parallel connection. The sample volume in the experiments was 377 liters, and the rotation of the model caused all fluid particl

    Estimation of the dispersion coefficients and sedimentation rate in compound channels with vegetated floodplains

    M Mohseni, JMV SAMANI, SA AYYOUBZADEH
    Journal Papers , Volume 13 , Issue 43500887, 2020 January 1, {Pages 51-61 }

    Abstract

    Increasing attention to environmental issues in management of rivers causes the development of research in the field of hydraulic parameters and sediment transport in the rivers. Vegetation in many rivers has a significant impact on the flow hydraulic, morphology and sediment transport processes. Understanding the hydraulics of flow in a compound channel with vegetated floodplains is very important for determining the stage-discharge curve and for supporting the management of fluvial processes. There are few models within CFD codes that conceptually or physically represent the hydrodynamic impact of a vegetation canopy on the velocity field and conveyance characteristics in estuarine or riverine systems. The present research investigates th

    Flood survey of Khuzestan province in 97-98 and providing solutions for its control and management in the future

    Seyed Ali Ayyoubzadeh
    Journal Papers , Volume 6 , Issue 400885, 2020 January 1, {Pages 1069-1084 }

    Abstract

    Considering the occurrence of a devastating flood in this years Khuzestan province, it is important to study and rotate the various aspects of this flood. The flood was the result of severe, extensive and simultaneous rainfall in the basins, and it was predicted to be at least 10 days before the incident. The floods have caused extensive waterlogging of cities, villages, roads, railways and agricultural lands, and long-term damage to all sectors, including oil and energy, transportation and commerce, and industry and agriculture. After review the different aspects of the floods, found that the main problem in the flood intensification was the lack confidence of the flood management authorities in the predictions and results of the simulatio

    Flow behavior in Non-Prismatic Convergent Compound Channel with Submerged Vegetation on Floodplains

    Fatemeh Vojoudi Mehrabani, Mirali Mohammadi, Seyed Ali Ayyoubzadeh, Jo?o N Fernandes, Rui ML Ferreira
    Journal PapersJournal of Hydraulics , Volume 15 , Issue 1, 2020 January , {Pages 97 }

    Abstract

    Introduction: Vegetation in compound channels by increasing factors such as roughness in the floodplains rather than main channel, velocity difference and momentum exchange between the sub sections, makes the transverse velocity gradient and apparent shear stress increase of the channel interface. In natural rivers, changing the cross section makes the uniform flow convertion to non-uniform. In prismatic channels, shear stress in the interface between main channel and floodplains, influences the transfer capacity and velocity distribution pattern significantly. This effect in non-prismatic channels, due to the extra momentum exchange between the sub-sections is more intense. In such conditions, identifying the flow hydraulic is too complex.

    Flood survey of Golestan province in 97-98 and providing solutions for its control and management in the future

    SEYED ALI AYYOUBZADEH
    Journal Papers , Volume 6 , Issue 400885, 2020 January 1, {Pages 921-942 }

    Abstract

    Considering the occurrence of damaging flood in Golestan province in 97-98, it is very necessary to investigate and rouse different dimensions of this flood. Therefore, a brief overview of recent floods in Iran was carried out and after the description of the specification of the Gorganroud basin, floods of Golestan province were reviewed in the last two decades. After describing the reports of floods 97-98 in Golestan province, the reasons for the flood were reported according to reports considered by the experts. At the end, comprehensive solutions were made to the conditions of the country, especially Golestan province. Some strategies of the advanced countries in the field of flood management have also been described, which can help to

    Turbulent flow structure in a vegetated non‐prismatic compound channel

    Fatemeh Vojoudi Mehrabani, Mirali Mohammadi, Seyed A Ayyoubzadeh, Jo?o N Fernandes, Rui ML Ferreira
    Journal PapersRiver Research and Applications , Volume 36 , Issue 9, 2020 November , {Pages 1868-1878 }

    Abstract

    The presence of vegetation on the floodplains of compound channels affects the structure of mean flow, increases flow resistance and turbulence intensity, and impacts sediment transport. In prismatic compound channels, the shear stress at the interface between the flows in the main channel and lateral floodplains has a strong influence in the cross sectional velocity distribution and thus conveyance of the channel. Due to mass transfer between subsections, these effects are enhanced in non‐prismatic channels. In the present study, the three‐dimensional turbulent flow structure in a vegetated non‐prismatic convergent compound channel is experimentally investigated. The main purpose is to clarify the explicit influence of the combinati

    Simulation and Evaluation of River Habitat Suitability Using SEFA Ecohydraulic Model (Case Study: Kordan River)

    Mohammadi Mahtab Ghambari, SEYED ALI AYYOUBZADEH, MEHDI YASI
    Journal Papers , Volume 7 , Issue 2, 2020 January 1, {Pages 437-450 }

    Abstract

    The main objective of this study is to investigate habitat suitability in a representative reach of the Kordan River for aquatic species (Oxynoemacheilus bergianus) using the SEFA ecohydraulic model. According to a study conducted so far, this software has not been used in Iran. First, using the topographic map of the Kordan River and ArcGIS software, the geometry of the river model and cross sections was created. Hydraulic calculations and simulations in this model including simulation of water levels were conducted using two methods of rating curve and Water Surface Profile (WSP). The calibration of the WSP model is adjusted by the Manning''s coefficient to establish a suitable fit between the observed and calculated water levels. In addi

    Flood survey of Khuzestan province in 97-98 and providing solutions for its control and management in the future

    SA Ayyoubzadeh
    Journal Papers , , {Pages }

    Abstract

    Experimental comparison of different methods with regard to sediment control and scour at the 90 degree water intakes

    ALI ATTARZADEH, Seyed Ali Ayyoubzadeh
    Journal PapersModares Civil Engineering journal , Volume 19 , Issue 2, 2019 July 10, {Pages 0-0 }

    Abstract

    An important goal of deviation of water flowing in a river is to control sediment and supply required water with minor sediment. This goal can be achieved using some sediment control structures, such as sill, spur dike and submerged vanes. These structures, however, can influence the flow pattern in a water intake, which induces scouring at downstream of the intake in main channel. For instance, generated helical motion due to secondary circulation induced by submerged vanes is the main cause of scouring at downstream of these structure. As for spur dikes, the generated helical motion is also the main cause of scouring in the main channel downstream, which occurs through increased flow velocity and curvilinear flow near the spur dikes. The

    River Bed Sediment Management by the Winged Bandal-Like Structure and Selection of Optimum Structure Using Ranking of SAW and TOPSIS Methods

    Abdollah Sardasteh, Seyed Ali Ayyoubzadeh, Mahmood Shafai Bejestan, Jamal Mohammad Vali Samani
    Journal PapersIranian Journal of Science and Technology, Transactions of Civil Engineering , 2019 January , {Pages 11-Jan }

    Abstract

    This experimental study investigated the physical model of a 180-degree river bend to introduce a new measure called as winged bandal-like (WBL) structure for river bed sediment management. The new structure is a combination of bandal-like (BL) and triangular vane structures. Nine different alternatives of the WBL structure, including three dimensionless vane effective lengths and three different vane angles, were tested in non-submerged and clear water conditions. A total of 18 attributes were then defined in accordance with the resulting river bed scouring and deposition. The multiple-attribute decision-making, simple additive weighting, and TOPSIS methods were employed to rank the alternatives. Baseline tests were also carri

    Simulation of mass transfer in a river with dead zones using network simulation method

    Atousa Ataieyan, Seyed Ali Ayyoubzadeh, Abdolreza Nabavi, Salvador ?ngel G?mez-Lopera, Gennaro Sepede
    Journal PapersThermal Science , Issue 00, 2019 January , {Pages 352-352 }

    Abstract

    In this study, Network Simulation Method (NSM) is applied to solve a onedimensional solute transfer problem governed by Transient Storage (TS) model in a mountain stream including dead zones. In this computational method, for each node of the discretized domain, the terms of governing equation are substituted by the equivalent electrical devices which are connected to each other based on Kirchhoff’s current law. Finally, the total electric circuit is solved using an appropriate electrical code to obtain the unknown value at the nodes. Because no analytical solutions for this model have been presented so far, to verify NSM, the problem is solved by Finite Volume Method (FVM), as well. According to the results, es

    Length-Weight Relationships for the Benthic Invertebrates of a Mountain River in the Southern Caspian Sea Basin, Iran

    M Hajiesmaeili, SA Ayyoubzadeh, A Abdoli
    Journal PapersJournal of Agricultural Science and Technology , Volume 21 , Issue 7, 2019 December 10, {Pages 1831-1841 }

    Abstract

    Biomass is an important parameter in studying a variety of energetic processes in food webs, community structure, and composition of aquatic organisms. Biomass determinations are based on direct weighing of animals, biovolume determination, and length-weight conversion. Although direct weighing of individual organisms is the most accurate methodology, its application is not very common due to its time consuming nature. Length-weight regressions are the most widely used approach for estimating benthic invertebrate biomass because they are less time consuming and more precise than other methods. In this research, length-weight relationships are evaluated for the most common benthic invertebrates found in an Iranian mountain river in the South

    Experimental study of flow hydraulic and sediment transport in Non-prismatic compound channels

    Hojjatallah Yonesi, MOHAMMAD HOSSEIN OMID, SEYED ALI AYYOUBZADEH
    Journal Papers , Volume 14 , Issue 214200778, 2019 January 1, {Pages 89-104 }

    Abstract

    In rivers with a compound section, typically the relatively high roughness of floodplains, as compared with the main channel, cause to flow speed difference between the main channel and the floodplain. The velocity dissimilarity also creates shear layers at the interface point of the main channel and the floodplain. The development of shear layers will also cause turbulence in the mutual plane of the main channel and the floodplain. In such conditions, the average flow speed cannot be applied to compute parameters such as shear stress, bed-load discharge, and so forth. In this research, laboratory experiments were carried out to study the effects of floodplain divergence on flow hydraulic and the rate of sediment transport for different rou

    Nature-Like Fishway Design and Evaluation its Performance with Habitat Simulation Model of PHABSIM

    Sara Sadat Badri, Seyed Ali Ayyoubzadeh, Mehdi Yasi
    Journal Papers , Volume 6 , Issue 100875, 2019 January 1, {Pages 13-Jan }

    Abstract

    The construction of multiple structures disconnects the migration course of fish in the river. Fishways are the most effective solution to re-establish the longitudinal connectivity of the river. Nature-Like fishways are among of the structures constructed in the last two decades and now that the point of views of river engineers in the world have changed and they seek to rehabilitate the rivers, it is necessary that our country's engineers also seek to design Eco-friendly structures, such as nature-like fishways. The purpose of this research is to present the basics of nature-like fishways and to design it for one of Iranian river and to evaluate it with the mathematical model of PHABSIM. The bypass is planned using stone weirs with hydrau

    Effect of Baffle blocks on the geometry of scour hole downstream of stilling basins

    M Valinia, SA AYYOUBZADEH, M YASI
    Journal Papers , Volume 13 , Issue 23300848, 2019 January 1, {Pages 19-Nov }

    Abstract

    Scouring around water structures, like resting basin, is one of the major issues which designers are always facing. Figure 1 shows the local scouring below the resting basin with a positive step in the Cybercrime deviation dam on the Agri River in Southern Italy (Huger, 1992). Different people have studied the factors affecting the scouring phenomenon in the downstream of resting basin. A study on the effect of floor blocks on hydraulic jump characteristics is done by Habibzadeh et al.(2011 and 2012). In his research, he investigated the effects of various parameters such as block dimensions, block distance from the gate and Froude number. The results showed that as the floor blocks slip away, the jet outlet valve changes; from the formatio

    Modeling of Solute Transfer in a River with Transient Storage Zones Using a Network of Equivalent Electrical Circuits

    Atousa Ataieyan, Seyed Ali Ayyoubzadeh, Abdolreza Nabavi, Salvador ?ngel G?mez-Lopera
    Journal PapersJournal of Hydraulics , Volume 14 , Issue 3, 2019 January , {Pages 33 }

    Abstract

    Introduction: Human activities everyday release a huge amount of domestic, industrial and agricultural waste into water bodies and continuously change the ecosystem conditions in the world. Considering the harmful effects of these pollutants entering water resources, study about pollution transfer in streams and predicting the pollutant concentration at downstream points seem to be important. For this purpose, the well-known classical advection-dispersion equation (ADE) was presented as the first attempt for describing mass transfer and energy transfer in physical systems. This equation is useful for channels with relatively prismatic and uniform cross-sections.Experimental studies carried out in rivers show that ADE is no longer applicable

    Investigation of hydraulic flow and sediment transport in Non-prismatic compound channels

    Hojjatallah Yonesi, Mohammad Hosein Omid, Seyed Ali Ayyoubzadeh
    Journal PapersJournal of Hydraulics , Volume 14 , Issue 2, 2019 July 23, {Pages 89-104 }

    Abstract

    In rivers with a compound section, typically the relatively high roughness of floodplains, as compared with the main channel, grounds the speed difference in these two ( main channel and floodplains). The velocity dissimilarity also creates shear layers at the interface point of the main channel and the floodplain. The development of shear layers will also cause turbulence in the mutual plane of the main channel and the floodplain. In such conditions, the average flow speed cannot be applied to compute parameters such as shear stress, bed-load discharge, and so forth. Laboratory experiments was carried out to investigate the effects of floodplain divergence on flow hydraulic and the rate of sediment transport through roughness and differen

    Experiment Study on Bed Topography around Wedged Bandal-like, Bandal-like and Impermeable Spur dike Structures at 180 Degree Bend in Non-submerged Conditions

    Abdollah Sardasteh, Seyed Ali Ayyoubzadeh, Mahmood Shafai Bajestan, Jamal Mohammad Vali Samani
    Journal PapersIrrigation Sciences and Engineering , 2019 May 13, {Pages }

    Abstract

    In this experiment study in order to increase the sedimentation behind bandal-like structure, a new structure called wedge bandal-like has been introduced and proposed and bed topography around wedge bandal-like, bandal-like and spur dike impermeable has been investigated in a physical model at 180 degree bend in non-submerged and clear water conditions. The results showed that maximum relative scour depth in the bandal-like and wedge bandal-like structures with a permeability of 50% and in the froud number 0.24 compared to the impermeable spur dike decreased by 59% and 18% respectively and maximum sedimentation height in the wedge bandal-like structure compared to the impermeable spur dike and bandal-like structures increased by 56 and 107

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    دروس نیمسال جاری

    • دكتري
      هيدروليك انتقال رسوب 2 ( واحد)
      دانشکده کشاورزی، گروه مهندسي و مديريت آب
    • دكتري
      هيدروليك انتقال رسوب 2 ( واحد)
    • كارشناسي ارشد
      هيدروليك انتقال رسوب 1 ( واحد)
    • كارشناسي ارشد
      هيدروليك زيستگاه هاي آبي 1 ( واحد)
    • كارشناسي ارشد
      هيدروليك زيستگاه هاي آبي 1 ( واحد)

    دروس نیمسال قبل

    • كارشناسي ارشد
      مدل هاي فيزيكي و هيدروليكي1 ( واحد)
      دانشکده کشاورزی، گروه مهندسي و مديريت آب
    • دكتري
      مدل هاي فيزيكي و هيدروليكي 2 ( واحد)
    • 1396
      ارفع فتح اله خاني, عاطفه
      بررسي درهم‌تنيدگي عوامل انسان ساخت و طبيعي در تغيير مورفولوژي رودخانه‌هاي فرامرزي كشور
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      طالبي, زهره
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      غفاري, حميده
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