M. Reza Kavianpour

M. Reza Kavianpour
Khaje Nasir Toosi University of Technology | KNTU · Faculty of Civil Engineering

PhD
Academic member K.N. Toosi University of Technology - President Water Research Institute of Iran (WRI)

About

140
Publications
24,265
Reads
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1,449
Citations
Additional affiliations
December 1996 - present
Khaje Nasir Toosi University of Technology
Position
  • Professor
Education
March 1991 - September 1997
The University of Manchester
Field of study
  • Water Engineering
September 1986 - September 1988
Amirkabir University of Technology
Field of study
  • Hydraulic Structures
September 1979 - September 1986
Amirkabir University of Technology
Field of study
  • Civil Engineering

Publications

Publications (140)
Article
Full-text available
In recent years, tapping the sea for potable water has gained prominence as a potential source of water. Since seawater intake systems are often used in the infrastructure industry, ensuring proper efficiency in different operating conditions is very important. In this paper, CFD modeling is used to show general hydraulic design (flow patterns, str...
Article
Stepped spillways are used to discharge excessing floods entering the reservoirs, through which the energy is exposed to highly dissipation rates. It consists of a series of steps along the spillway to ensure a uniform flow along the spillway. Steps improve the rate of energy dissipation along the spillway, which consequently affect the flow charac...
Article
Full-text available
Drought as a reversible climate phenomenon is an inevitable fact, especially in arid and semiarid areas. Therefore, predicting drought is important to deal with and mitigate its effects. Hydrological drought with its direct effect on water resources is the most important type of drought. It is caused by the lack of surface water flow and river disc...
Article
Full-text available
Shoreline protection remains a global priority. Typically, coastal areas are protected by armoring them with hard, non-native, and non-sustainable materials such as limestone. To increase the execution speed and environmental friendliness and reduce the weight of individual concrete blocks and reinforcements, concrete blocks can be designed and imp...
Article
Scouring at the downstream of culvert is considered as one of the main reasons of culvert failure. Failure of the culvert structure is a catastrophic phenomenon. Studying the causes of scouring will give an idea about the solution probabilities; the blockage and geometry of culvert have a great influence on the local scour. In this study, simulated...
Conference Paper
Full-text available
یکی از عوامل اصلی تخریب بر روی سرریزها، رخداد کاویتاسیون می‌باشد. این پدیده در نقاطی از سازه که سرعت جریان آب زیاد بوده و فشار آب به پائین‌تر از فشار اتمسفر کاهش می‌یابد، امکان وقوع خواهد داشت. در تحقیق حاضر پدیده کاویتاسیون در طول تنداب سرریز سد سردشت استان خوزستان، با استفاده از مدل فیزیکی مورد مطالعه قرار گرفت. آزمایش‌ها در 6 دبی، به‌ازای دوره‌ه...
Conference Paper
Full-text available
شیرهای هاول‌بانگر یکی از سازه‌های کنترل و استهلاک انرژی است که معمولاً در خروجی سدها مورد استفاده قرار می‌گیرد. این شیرها در دو حالت با و بدون هود کاربرد دارند. در شرایطی که فضای کافی در پایین‌دست جریان وجود نداشته باشد، شیرهای هاول‌بانگر مجهز به هود استفاده می‌شوند. در این شرایط، جریان به‌صورت محوری به پایاب منتقل می‌شود. در پایین‌دست سد خدا آفرین...
Article
Full-text available
Low impact development (LID) techniques are increasingly used as a stormwater management strategy to maintain the hydrological conditions of developed areas and mitigate the negative consequences of stormwater runoff and nonpoint source pollution. Although LID techniques have been commonly used in moderate to humid areas, further information is nee...
Article
Full-text available
Bottom outlets are significant structures of dams, which are responsible for controlling the flow rate, operation, or removal of reservoir sedimentation. The service gate controls the outlet flow rate, and whenever this gate is out of order, the emergency gate which is located at upstream is utilized. The cavitation phenomenon is one of the common...
Article
Caspian Sea as the largest inland water body plays an important role in economy of its neighbor countries apart from its environmental significance. This study explores wave climate in three locations in the southern Caspian Sea considering the socioeconomic pathway scenarios. In this regard, significant wave height, peak wave period and potential...
Article
Full-text available
Spillways are the most important structures of large dams that are responsible for releasing the excessive flood discharge from the reservoir. Although many studies have been performed to determine the flow characteristics over these structures, however, the available information on the shockwaves’ characteristics for spillways’ design is limited....
Article
Pressure fluctuation is one of the major turbulent flow characteristics. It may cause crucial problems for hydraulic structures. This research is based on experimental studies, and it focuses on the measurements of pressure fluctuations along flip bucket spillways with different geometrical characteristics. The function of the flip bucket spillway...
Article
In the past years, Khuzestan province which is located in the southwest of Iran has experienced severe droughts. Drought can be explained by its characteristics known as duration or severity. However, combination of the two features by probabilistic approach is appeared to be a well improved method to describe the phenomena. The aim of this study i...
Article
Drought is asserted as a natural disaster that encompasses vast territories for a long time and affects human life. Indicators are powerful tools for understanding this phenomenon. However, in order to get more information about the drought, multivariate indices were introduced for simultaneous evaluation of multiple variables. In this study, a com...
Article
Flip buckets are usually used in high head dams to dissipate the destructive energy of high speed jets. These structures are fixes at the end of the outlet conduits to direct the moving jet into the atmosphere. The process of energy dissipation also resumes, while the jet entering into its downstream plunge pool. Although studies of flow over flip...
Conference Paper
سازه‌هاي کنترل در سدهاي بزرگ از جمله ابنيه مهم در سازه‌هاي هيدروليکي مي‌باشند. شيرهاي مخروط ثابت و پروانه‌اي يکي از اين نوع سازه‌ها هستند که به‌صورت متداول در تونل‌هاي تخليه‌کننده تحتاني و آبگيرهاي تونلي مورد استفاده قرار مي‌گيرند. تعيين فاصله بهينه بين دو شير هاول‌بانگر و پروانه‌اي به‌گونه‌ای که آشفتگي جريان خروجي از شير پروانه‌اي، قبل از ورد به ش...
Article
This study investigates future variability of wave power in the Persian Gulf. The contribution of this paper is twofold: (a) to evaluate spatiotemporal resolutions, downscaling techniques and global circulation model (GCM) selection impacts running multi-climate models, and (b) to project wave energy resources and its variability by the end of 21st...
Article
The aim of this study is to develop a Weibull-based distributed downscaling technique for wind field as forcing for the wave models to investigate the wave climate under future scenarios. For this purpose, the statistical downscaling approach modifies Weibull distribution parameters of the global circulation model wind speeds based on the correspon...
Article
An important part in designing stepped spillways is making the spillway in order to direct the flow appropriately on the first step. In low discharges, the water flow moves over the spillway and arrives at the first step, and if the first step is high enough, the flow may leave the first step horizontally, skip some steps and land as a free jet of...
Article
On Gravity platform Dynamic Response is a support structure held in place by gravity. Given that the gravity platforms are supportedby the sea bed but not attached to the ground, the motion of them is known as a rocking fluctuation. During the fluctuations, theplatform maybe overturned if the angle is large. In this study, using Ansys Aqwa hydrodyn...
Conference Paper
Full-text available
توزیع فشار پیرامون دریچه های تحتانی سدها و نقش آن در ارزیابی وقوع کاویتاسیون، ارتعاشات مخرب دریچه ها و تعیین نیروی پایین کشنده از مباحث مهم تخلیه کننده های تحتانی محسوب می شود. با توجه به عدم وجود روابط صریح برای محاسبه توزیع فشار و به دلیل تاثیرگذاری پارامترهای مختلف همچون هندسه دریچه، هندسه مجرا قبل و بعد از دریچه و شرایط هیدرولیکی، با استفاده از...
Article
Full-text available
Articulated concrete block mattress (ACB Mats) revetment on coastal embankment are an alternative for the unit armours that have higher implementation speed and less construction cost. Considering the fact that there are no relations to exactly design ACB Mat to estimate wave reflection and overtopping processes, further studies seem necessary. The...
Article
This study proposes a simple approach based on Weibull distribution parameters for downscaling climatic wind speed and direction. In this method, the Weibull parameters of a Global Climate Model (GCM) are modified using Weibull parameters of the reference data (ECMWF). To correct the wind direction, the downscaling technique was applied to the east...
Article
Full-text available
In recent years, with daily progress in technology, application of wind turbines for energy generation has become common all around the world. Installation of these turbines at sea encountered a great deal of challenge. One of the most important challenges is scouring around the piles of these turbines due to sea waves and current interaction. Many...
Article
Full-text available
Drought as a natural disaster impresses people living. The main tool in better management of such phenomena is to explain its characteristics, using drought indices. The indices use precipitation, temperature, streamflow, and other hydrological variables to explain such events. In this study, standardized precipitation index (SPI) and stream-flow d...
Article
Full-text available
This research aims to develop a novel method named region probability matching method (RPMM) for calibrating the Amir-Abad weather radar located in the north of Iran. This approach also can overcome the limitations of probability matching method (PMM), window probability matching method (WPMM), and window correlation matching method (WCMM). The emp...
Article
Full-text available
Flip buckets are often used at the end of chute spillways to dissipate energy and direct flow to submergence plunge pool and especially in large dams. Flip buckets with central deviation also are a specific and new design of these buckets that have a transverse slope and are mixed in plan with a curvature. In this paper, the experimental and numeri...
Article
In this research, due to the ability of artificial neural network in modeling of highly nonlinear systems, intelligent turbulence model was proposed for prediction of channel flow. The flow analysis in the channel is done using the direct simulation method known as DNS. A pseudo spectral method is used in Cartesian coordinates . The friction Reynol...
Conference Paper
Full-text available
In this research, the new regulations, the guidelines and the methods in flood management and the protection of river water quality have been analyzed. The new applied methods in Japan for flood management have been considered in the case study analysis and by using modeling techniques; the applicability of them has been analyzed. The applied model...
Conference Paper
Full-text available
In this research, the different methods for determining the buffer zones for flood plain and protection of the water quality have been analyzed. Moreover, the impacts of each method have been analyzed including the flood plain area with different return periods, the impacts of vegetative filter strips on the downstream water flow, the role of ripar...
Article
Full-text available
This study explores the river-flow-induced impacts on the performance of machine learning models applied for forecasting of water quality parameters in the coastal waters in Hilo Bay, Pacific Ocean. For this purpose, hourly recorded water quality parameters of salinity, temperature and turbidity as well as the flow data of the Wailuku River were us...
Article
Articulated concrete block mattress revetment (ACB Mats) is an appropriate revetment for shore protection and breakwater. ACB Mats act as an integrated and flexible revetment against waves. There is a necessary need of investigation due to the lack of exact ACB Mat design relations in the estimation of hydrodynamic processes including wave run-up a...
Article
Full-text available
Flip bucket is one of the energy dissipaters which passes over flow through the dam and is used for injecting the flow to the plunge pool. Impact of the water jet with river leads bed elevation to change and it not only threatens the stability of dam, but also influences the river in downstream. Experimental studies include record of changes in bed...
Article
In this study, an integrated artificial neural network (IANN) model incorporating both observed and predicted time series as input variables conjoined with wavelet transform for flow forecasting with different lead times. The daily model employs forecasts of the tributaries in its input structure in order to predict the daily flow in the main river...
Conference Paper
Full-text available
با پیدایش سدهای بتن غلطکی و سازگاری سرریز پلکانی با آنها، استفاده از این نوع سرریزها بیش از پیش مورد توجه قرار گرفت. با توجه به پیچیدگی هیدرولیک سرریزهای پلکانی، مدل‌های آزمایشگاهی بسیاری جهت دست‌یابی به روابط تجربی حاکم بر جریان این نوع سرریزها ساخته و آزمایش شده‌اند. در این مقاله با استفاده از نرم‌افزار FLOW-3D، به بررسی تأثیر تغییرات دبی جریان و...
Article
In this study, pressure fluctuation and also the effect of entrance flow conditions on the pressure fluctuation on the bed of compound flip buckets used in the Gotvand dam in Iran are investigated experimentally. For this purpose, Pressure fluctuations on the buckets are measured in the entrance flow Froude number range of 3.5–7.5. Results show tha...
Article
Full-text available
Accuracy of rainfall quantification is one of the most important concerns in meteorological and hydrological modelling. Satellites and weather radars can provide meteorological information with higher temporal and spatial resolution than ground stations. Rain gauges measure rain rate directly; however, weather radars estimate rain rate by convertin...
Article
سازه‌های متقاطع رودخانه‌ای از قبیل آبشکن‌ها به لحاظ مهندسی در تثبیت کناره رودخانه و کنترل فرسایش نقش موثری دارند . طی مطالعات میدانی و آزمایشگاهی در این مقاله تاثیر زیست محیطی این سازه‌ها بر احیای اراضی مجاور رودخانه‌ و پیوستگی زیست محیطی بین سیلاب‌دشت و رودخانه مورد بررسی قرار گرفت.از این رو مطالعات در دو فاز میدانی در محدوده ای از رودخانه قزل اوز...
Article
A reliable prediction of dispersion coefficient can provide valuable information for environmental scientists and river engineers as well. The main objective of this study is to apply intelligence techniques for predicting longitudinal dispersion coefficient in rivers. In this regard, artificial neural network (ANN) models were developed. Four diff...
Article
Revetment is a protective structure for a shoreline with stony material, usually natural stone or concrete, with a thickness of only one layer of elements and of which the elements are placed in a pattern. Various conditions of designing and implementing coastal protection structures such as implementation speed and construction cost; cause the use...
Article
In this study, a new approach is presented to predict rainfall and runoff in Tolt River basin within the next two months. For this purpose, a combination of wavelet transform and artificial neural network (WANN) incorporating both observed and predicted time series in the input structure is taken under consideration. To simulate the runoff process...
Article
Full-text available
In this paper, a quantitative evaluation of the severe dust storm which occurred in the Middle East during 3–8 July 2009 is presented. The quantification is based on the numerical simulation using the WRF/Chem-D model which has been verified and calibrated for the Middle East region. It is found that, during the 3–8 July 2009 event, more than 9.67...
Article
Full-text available
The longitudinal dispersion coefficient is a key element in determining the distribution and transmission of pollution, especially when cross sectional mixing is completed. However, the existing predictive techniques for this purpose exhibit great amounts of uncertainty. The main objective of this study is to present a more accurate model for predi...
Article
In this research, the performance of various aliased and de-aliased schemes was studied in pseudo-spectral (PS) simulation. The PS method was used to perform aliased and de-aliased direct numerical simulation of a turbulent plane Poiseuille channel flow. The effects of aliasing errors in Navier?Stokes equations were examined for both common skew-sy...
Article
Armour is a pavement made of erosion resistant materials like a stone or concrete which is constructed to protect breakwater, coasts and other coastal line features against erosion. These armours are a kind of protective layer made of stone or concrete, used in breakwater constructions or coastal lines, arrayed with specific regular or irregular pa...
Conference Paper
Full-text available
سازه‌های متقاطع رودخانه‌ای از قبیل آبشکن‌ها به لحاظ مهندسی در تثبیت کناره رودخانه و کنترل فرسایش نقش موثری دارند . طی مطالعات میدانی و آزمایشگاهی در این مقاله تاثیر زیست محیطی این سازه‌ها بر احیای اراضی مجاور رودخانه‌ و پیوستگی زیست محیطی بین سیلاب‌دشت و رودخانه مورد بررسی قرار گرفت.از این رو مطالعات در دو فاز میدانی در محدوده ای از رودخانه قزل اوز...
Article
Full-text available
Estimation of discharge coefficient for lopac gates plays an important role in determining the discharge of such structure, as a flow control and regulation structure. The present research provides semi-analytical equations to estimate the discharge coefficient for submerged lopac gates for different conditions. The results indicate that the discha...
Conference Paper
Full-text available
ساماندهی رودخانه در جهت کنترل و جلوگیری از تغییرات بستر و دیواره رودخانه از اهمیت ویژه ای برخووردار است. یکی از سازه‌های مورد استفاده جهت ساماندهی رودخانه ها ، آبشکن می باشد. در این مطالعه عملکرد آبشکن سری به صورت جاذب و برگردان در آزمایشگاه ، علوم تحقیقات آب تحت زوایای ۱۳۵ ، ۱۲۰ و ۹۰ درجه ( جاذب و برگردان)، با سه دبی ( غیرمستغرق ، آستانه استغراق و...
Poster
همانطور که رودخانه‌ها دچار پدیده فرسایش و رسوبگذاری می‌شوند لذا امر کنترل آن بسیار ضروری می‌باشد. آبشکن‌ها ،سازه‌های کنترل فرسایش رودخانه‌ها به عنوان سازه‌های متقاطع جریان، جهت کنترل فرسایش به کار گرفته می‌شوند. در این تحقیق عملکرد آبشکن سری به صورت دافع و برگردان در آزمایشگاه علوم تحقیقات آب تحت زوایای 45 ، 60 و 90 درجه ، با دبی 80، 100 و 120 لیتر...
Conference Paper
Full-text available
1 ، ‫ﻣﺤﻤﺪرﺿﺎ‬ ‫ﻛﺎوﻳﺎﻧﭙﻮر‬ 2 ، ‫ﻣﺠﺪزاده‬ ‫ﻣﺤﻤﺪرﺿﺎ‬ ‫ﻃﺒﺎﻃﺒﺎﻳﻲ‬ 3 ‫ﺳﻮﻻ‬ ‫اﻣﻴﻨﻲ‬ ‫،ﺳﺤﺮ‬ 4 ‫اﻣﻴﻨﻲ‬ ‫ﻛﻤﺎل‬ ، ‫ﺳﻮﻻ‬ 5 1-‫آزاد‬ ‫داﻧﺸﮕﺎه‬ ، ‫آب‬ ‫ﻣﻬﻨﺪﺳﻲ‬ ‫رﺷﺘﻪ‬ ، ‫ارﺷﺪ‬ ‫ﻛﺎرﺷﻨﺎﺳﻲ‬ ‫داﻧﺸﺠﻮي‬ 2-‫ﻃﻮﺳﻲ‬ ‫ﻧﺼﻴﺮاﻟﺪﻳﻦ‬ ‫ﺧﻮاﺟﻪ‬ ‫،داﻧﺸﮕﺎه‬ ‫زﻳﺴﺖ‬ ‫ﻣﺤﻴﻂ‬ ‫ﻣﻬﻨﺪﺳﻲ‬ ‫و‬ ‫ﻋﻤﺮان‬ ‫داﻧﺸﻜﺪه‬ ، ‫دﻛﺘﺮ‬ 3-‫داﻧﺸﻜﺪه‬ ، ‫دﻛﺘﺮ‬ ‫ﺑﻬﺸﺘﻲ‬ ‫ﺷﻬﻴﺪ‬ ‫داﻧﺸﮕﺎه‬ ، ‫زﻳﺴﺖ‬ ‫ﻣﺤﻴﻂ‬ ‫و‬ ‫آب‬ 4-...
Conference Paper
Full-text available
مکانیزم جریان در رودخانه‌ها به گونه‌ای است که مقطع یک رودخانه به مرور زمان دچار تغییرات می‌گردد . یکی از موثرترین روش‌های تثبیت سواحل و ساماندهی رودخانه‌ها استفاده از آبشکنها می‌باشد. با توجه به اینکه آبشستگی اطراف آبشکن‌ها یکی از مهمترین عامل در طراحی و ساخت آبشکن می‌باشد لذا امر کنترل آن می‌تواند از دغدغه‌های بشری می‌باشد که تلاش‌های بسیاری برای...
Article
Full-text available
Estimating Flow and Discharge Coefficient Equations for Lopac Gate In Submerged Condition, Based on Momentum Equation F. Yousofvand, M.J. Monem, and M.R. Kavianpour Expanded Abstract Lopac gates are considered as water level and flow regulating structures in the canals. Lopac gates are similar to saloon doors, hinged at vertical walls of the canal...
Conference Paper
Full-text available
Usually the rivers are exposed to sedimentation and erosion, which affects the river morphology and its protection policies. Thus, it is very important to understand the mechanism of scouring and to control the process. In this paper, the impact of groins as a flow transverse structure for controlling the river erosion is studied. Experiments were...
Article
Full-text available
Flip buckets are usually placed at the end of chute spillways or outlet conduits of high dams. The projected jets from these buckets jump into plunge pools to dissipate the destructive energy of plunging jets. Compound flip bucket is a special bucket with a non-zero degree of cross sectional slope, followed by a curvature in its longitudinal direct...
Article
The main objective of this study is to apply artificial neural network (ANN) and wavelet-neural network (WNN) models for predicting a variety of ocean water quality parameters. In this regard, several water quality parameters in Hilo Bay, Pacific Ocean, are taken under consideration. Different combinations of water quality parameters are applied as...
Conference Paper
Full-text available
Now-a-days, with advances in science and technology and development of the river training techniques, various solutions have been developed for river protection, including installation of groins. Groins are installed at the riverbank with different angles to the bank. Since they intersect with the flow, the flow velocity increases and hence, a scou...
Conference Paper
Full-text available
رودخانه‌ها در مسیر تکاملی همواره دستخوش تغییر وتحول و دگرگونی بوده‌اند. فرسایش جداره ‌و رسوبگذاری از جمله این تغییرات می‌باشند. از جمله روش‌های حفاظت و ساماندهی سواحل رودخانه، ساخت سازه‌هایی است که بر خطوط جریان تاثیر گذاشته و موجب انحراف آنها از دیواره‌های فرسایشپذیر به قسمت‌های میانی رودخانه می‌شود و یا با کاهش سرعت از شدت برخورد جریان با دیواره‌...
Conference Paper
Full-text available
The objective of this paper is to error analysis of two widely-used   25. 0 25. 0  satellite rainfall estimate (SRE) algorithms, named PERSIANN and TRMM (TMPA-3B42) using copula. In this study, the daily products of SREs from 2002 to 2006 have been compared with ground rain gauges data in a part of Iran. Because of uneven distribution of ground...
Conference Paper
Full-text available
This paper presents the effect of seasonal decomposition of time series in daily flow forecasting. Models are developed for each season separately and a wavelet-neural network approach is applied to predict the flow discharge in Karaj River. Different combinations of the meteorological data (precipitation and temperature) and the flow discharge wit...
Conference Paper
Full-text available
از جمله روش‌های ساماندهی سواحل رودخانه، سازه‌هایی است که بر خطوط جریان تاثیر گذاشته و موجب انحراف آنها از دیواره‌های فرسایشپذیر می‌شود و توانایی رسوب‌گذاری جریان را افزایش می‌دهند، آبشکنها از متداولترین این روشها محسوب میشوند. در این تحقیق ،مطالعه‌ی آزمایشگاهی الگوی فرسایش در جلوی آبشکن‌های سری به صورت جاذب(135 درجه) و دافع(45 درجه) مورد مطالعه قرا...
Presentation
Full-text available
از جمله روش‌های ساماندهی سواحل رودخانه، سازه‌هایی است که بر خطوط جریان تاثیر گذاشته و موجب انحراف آنها از دیواره‌های فرسایشپذیر می‌شود و توانایی رسوب‌گذاری جریان را افزایش می‌دهند، آبشکنها از متداولترین این روشها محسوب میشوند. در این تحقیق ،مطالعه‌ی آزمایشگاهی الگوی فرسایش در جلوی آبشکن‌های سری به صورت جاذب(135 درجه) و دافع(45 درجه) مورد مطالعه قرا...
Article
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