Improvement in Yield and Water Use Efficiency of Wheat in Lower Part of Kharkheh River Basin
غلامحسن
رنجبر
معاون پژوهش و فناوری مرکز ملی تحقیقات شوری
author
محمدحسن
رحیمیان
کارشناس ارشد مرکز ملی تحقیقات شوری
author
یوسف
هاشمی نژاد
استادیار مرکز ملی تحقیقات شوری
author
مهدی
شیران تفتی
کارشناس مرکز ملی تحقیقات شوری
author
عباس
ساکی حسینی
کارشناس ترویج مدیریت جهاد کشاورزی سوسنگرد
author
text
article
2020
per
Implementation of research findings and their application in the field is a prerequisite for any improvement in quantity and quality of agronomic products. To investigate the effect of research findings on the wheat yield, two benchmark sites were chosen in the downstream Lands of Kharkheh River Basin, one with drainage (site 1) and another without drainage (site 2) system during 2013-14 and 2014-15 cropping seasons. Treatments were application of some research findings such as leveling, certified seed, appropriate amount and application time for fertilizer and proper irrigation method as Research Management (RM) and farmer management as "Traditional Cultivation" (TC). Results showed that application of recommended package in RM treatment in 2013-14 increased the grain yield by 14 and 44% in sites 1 and 2 compared to TC treatment, respectively. While the values of the improvement in grain yield in the same sites for 2014-15 were 44 and 52%, respectively. During these two years the mean grain yields for RM and TC treatments were 4178.5 and 3321.0 Kg ha-1 in site 1, and 2976.5 and 1999.0 Kg ha-1 in the site 2, respectively. Based on the balance of a cropping season in 2013-14, the increased net benefit in RM treatment were 1.2 and 1.98 times more than the TC treatment in the sites 1 and 2, respectively. Application of the recommended package in 2014-15 increased the net benefit in RM treatment by 1.69 and 1.86 times more than TC treatment in the sites 1 and 2, respectively.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
1
14
https://water-soil.tabrizu.ac.ir/article_12157_dc282360a91b240b00ac7fea571d1613.pdf
Analytical Investigation of Longitudinal Velocity Theories in Flow Vertical Direction
yaghoub
azhdan
Ph.D of water structures engineering, Sari Agricultural Sciences and Natural Resources University,Sari, Iran.
author
jafar
chabokpour
Faculty of Engineering, University of Maragheh, Maragheh, Iran.
author
alireza
emadi
Associate Professor, Department of Water Engineering, Sari Agricultural Sciences and Natural Resources University,Sari, Iran.
author
text
article
2020
per
< p >Computation of longitudinal velocity in the vertical direction and extracting the applied theories have been conventional manner from past years among the hydraulic engineers. In many previous investigations, the researchers have tried to extract some applied equations, separately, by dividing the flow depth namely from bed to water surface to various regions. As it is accepted by all of the researchers, the laminar sublayer zone has a linear velocity profile while out of this zone, the velocity simulation follows a logarithmic law which its accuracy in estimation of the velocity decreases by increasing the distance from the bottom of the channel. Also, it is not applicable for dip phenomenon which occurs bellow the free surface. In the current study, 12 experimental data series, operated under different experimental conditions, were collected from previous researches. Also, three common theories of log law, log- wake law, and modified log- wake law have been applied to simulate longitudinal velocity profile in the vertical direction. Finally, it is seen that the modified log- wake law has a better agreement with the experimental data, and also it can be operated for predicting the dip phenomenon bellow the free surface. For solving the equation of the mentioned theory, the factors of von Karman, wake strength, and shear velocity are assumed unknown. Then, the mentioned parameters have been extracted using a non-linear optimization technique of the least square curve fitting.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
15
28
https://water-soil.tabrizu.ac.ir/article_12158_22c6ff6eef5a3b3a1355e5797157c8c4.pdf
Implementation of Data Jittering Technique for Seepage Analysis of Earth fill Dam Using Ensemble of AI Models
Elnaz
Sharghi
Department of Water Resources Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran
author
Vahid
Nourani
Department of Water Resources Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran
author
Nazanin
Behfar
Department of Water Resources Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran
author
text
article
2020
per
Recently, it has been shown that Artificial Intelligence (AI) methods such as Feed forward neural network and Support vector regression have great capability in modeling of non-linear hydraulic time series. AI methods offer effective approaches for handling large amounts of dynamic, non-linear and noisy data. Hence in this paper, seepage of Sattarkhan earth fill dam using two AI models of Feed forward neural network and Support vector regression was simulated, based on 2 scenarios with different combination of inputs. Afterwards, as a pre-processing method for improving the model performance, normally distributed noises with the mean of zero and various standard deviations were generated and added to the time series to form different jittered training data sets, for AI modeling of seepage. Further, as another method for improving the model performance, an ensemble post-processing model was developed using outputs of sole models. Non-linear neural averaging method was considered for model ensembling. The obtained results indicated that simultaneous application of the both jittering and model ensembling methods improved the model accuracy up to 32% in the verification step.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
29
41
https://water-soil.tabrizu.ac.ir/article_12159_7f9ac0ee005a9a5f577623f98028864d.pdf
Developing Unsteady Flow Numerical Model Semi-Coupled with Sediment Transport in River Systems
Sabah
Mohamadi
Phd graduate of razi university
author
Rasool
Ghobadian
associate professor
author
mahmood
kashefipour
professor
author
text
article
2020
per
It is so essential for engineers to be able to predict the places in which deposition and scouring occurs. Numerical models are valuable tools for estimating flow conditions and sediment transport, and are widely applied in water resources management. The main goal of this study is to develop one dimensional, unsteady, hydrodynamic model which can be used for simulating flow and sediment transport as semi-coupled model in river systems. In this research, the Saint- Venant’s equations are numerically solved for river systems. In this research a semi implicit finite difference scheme is developed to solve the Saint- Venant equations for unsteady flow. The linear equations are produced based on the partial differential equations and the staggered technique. After solving the above equations, the computed hydraulic parameters in this part are sent to the sediment transport segment. . The dynamic advection- dispersion equation and the sediment continuity partial differential equation were applied to calculate the suspended sediment concentration and bed load transport, respectively. The Exner equation is then used to predict the changes in the river bed elevations. Finally, the model was compared to the Hec-Ras Model and the results showed that the developed model has good accuracy.Keywords: Sediment Transport, Flow Routing, River Systems, Numerical Model
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
43
56
https://water-soil.tabrizu.ac.ir/article_12160_fefb78434864caedcfd385cca596cc03.pdf
The Impact of Irrigation Frequency on Growth and Survival of Zygophyllum fabago L. Under Different Irrigation Systems
زهرا
جعفری
دانشگاه
author
hamid
matinkhah
Isfahan
Industrial University
author
hajar
kalkate
department of natural resources, isfahan university of technology
author
text
article
2020
per
With respect to water shortage during the recent decades, subsurface irrigation method has been considered in arid and semiarid zones. Therefore, experimental design was performed as completely randomized blocks with four repetitions in Isfahan University of Technology. Then, the effects of different irrigation intervals of every day, every other day and once a week under the surface and subsurface irrigation on height, collar diameter, chlorophyll content and stomata conductivity of Zygophyllum fabago L. were investigated. The percentage of plant survival was also recorded six months after planting. The results showed that irrigation interval had a significant effect on height, chlorophyll content and stomata conductivity of the tested plant (p < 0.05) and the height, diameter of the collar and stomata conductivity decreased by increasing the irrigation interval. While, the irrigation interval didn’t have a significant effect on the collar diameter (P>0.05). The highest percentage of survival (100%) was observed in subsurface irrigation treatment and control treatment had the lowest percentage of viability (70%). It could be concluded that the improvement of growth parameters and survived of Zygophyllum fabago were better with the subsurface irrigation than the surface irrigation.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
57
67
https://water-soil.tabrizu.ac.ir/article_12161_30481b7b77f2c354c2e4aca2c4a38713.pdf
Determining Optimum major Crops Cultivation Areas in Different Levels of deficit Irrigation in Qazvin Irrigation and drainage district
Fahimeh
Shirshahi
Ph.D. Candidate, Department of Agricultural Systems engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
author
Hossein
Babazadeh
Department of Agricultural Systems engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
author
Nyazali
Ebrahimipak
Associate Professor, Department of Irrigation, Soil and Water Research Institute, Agricultural Research, Education and Promotion Organization
author
MohammadReza
Khaledian
Associate Professor of Water Engineering, Faculty of Agricultural Sciences, University of Guilan, and Caspian Sea Basin Research Center, Rasht, Iran
author
text
article
2020
per
Designing and implementing suitable cropping patterns are necessary to control the limiting factors and optimal utilization of available water resources. In the present study, cropping pattern optimization in Qazvin irrigation and drainage district has conducted considering the five levels of irrigation including I1, I2, I3, I4, and I5 (representing water allocation of 100, 90, 80, 70, and 65 percents of the crop evapotranspiration) and three different levels of cultivated areas including S1, S2, and S3 (representing, current cultivated area, 10 percents increase and 10 percents decrease in the crop cultivated area compared to the current conditions). Crops cultivation areas and water allocation were optimized using a linear programming method and the objective function was to maximize the benefit. The results indicated that the model in condition S2 allocated the most cultivation area to strategic crops and in condition S3 allocated the most cultivation area to economic crops. The condition S3I1 had the highest income (315 million rials) among the all scenarios. Water allocation alternative named I2, increased the economic productivity by average 0.82 million rials per cubic meter of water at all the cultivation area alternatives while maintaining income. Therefore, it was possible to allocate less cultivation area and a lower amount of water while earning more income. Also, water allocation alternatives named I4 and I5 were not recommended due to reduced income and yield. Model had limited cultivation area of water-consuming crops such as tomato, sugar beet, and alfalfa under water shortage condition.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
69
81
https://water-soil.tabrizu.ac.ir/article_12162_c0b7a94ac911eb1ed04eb9d7126c59c3.pdf
Comparison of Neural Network and Neuro-Fuzzy Techniques to Improve the DRASTIC Frame Work (Case Study: Shabestar plain Aquifer)
Asghar
Asghari Moghaddam
Department of Earth Sciences, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
author
Fatemeh
Kadkhodaie
Department of Earth Science, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
author
Rahim
Barzegar
Department of Earth Sciences, Faculty of Natural Sciences, University of Tabriz
author
Maryam
Gharekhani
Department of Earth Sciences, Faculty Of Natural Sciences, University of Tabriz
author
text
article
2020
per
Increasing population and rising water requirements have raised the use of freshwater resources such as groundwater. Therefore, assessing the vulnerability of groundwater is a suitable method for identifying the vulnerable areas and protecting these resources. Shabestar plain in East Azarbaijan province is an active agricultural area and the use of groundwater resources in this plain is important due to the shortage of annual precipitation. In this study, the DRASTIC frame work was used to assess the vulnerability of the Shabestar plain aquifer. The amount of DRASTIC vulnerability index in the study area was calculated as 53.3to 118.3. Given that the weights of the DRASTIC frame work were somewhat expert, so the main purpose of this study was improvement of the DRASTIC by two methods of Neural Network and Neuro-Fuzzy. DRASTIC inputs were introduced as inputs of the both artificial intelligence models. The corrected DRASTIC index with nitrate concentration was considered as the outputs of the models. Nitrate values were categorized into two groups of train and test. After training the model the results of the model were evaluated at the test step with nitrate concentration. The results showed that the both artificial intelligence models had the high ability to improve the DRASTIC model. Nevertheless, the neuro-fuzzy model having a higher correlation coefficient with nitrate was a suitable method for assessing the vulnerability of Shabestar plain aquifer.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
83
95
https://water-soil.tabrizu.ac.ir/article_11648_fbe90bc29ccd31f7ba7d8b7ca693514b.pdf
Investigation of water volume controller emitter effect on water distribution uniformity in micro-irrigation systems
Javad
Behmanesh
Urmia University
author
سعید
زمانی
دانشگاه ارومیه
author
کامران
زینال زاده
دانشگاه ارومیه
author
text
article
2020
per
The performance of existence emitters in micro irrigation systems is on the basis of pressure dissipation and their inefficiency in the pressure regulation and discharge uniformity has been reported by researchers. In this research, in order to improve emitters' efficiency in micro irrigation systems, new emitters named water volume controller emitters were designed and evaluated. One hundred emitters were installed in the field conditions on a micro irrigation system and the exiting water volume was measured until cutoff time. The cutoff time of the emitters were measured with three repetitions at the pressures of 0.5, 1, 1.5, 2 and 2.5 Atm in five positions including the first, third, mid, two-thirds and end of lateral pipe. Finally, the obtained results were evaluated on the basis of ASAE standards. In the field experiments and in the pressure of 0.5 Atm, the maximum value of coefficient of variation was obtained 3.3% which was evaluated in the excellent category in the all applied pressures. Also, at the minimum pressure, the coefficients of distribution uniformity and emission uniformity were obtained 97.6% and 91% respectively, so that the mentioned values had minimum values. In all pressure-discharge equation, the pressure exponent was approximately estimated 0.55. The type of flow in emitters was turbulent. The appropriate performance of the mentioned emitters in creating water distribution uniformity showed that the change of view about emitters' mechanism and the developing new emitters with efficient mechanism can improve the efficiency of micro irrigation systems.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
97
108
https://water-soil.tabrizu.ac.ir/article_12163_c35aa2aec027c04cb20214d7e51d4148.pdf
Optimal Operation of Single Reservoir System Using Improved Artificial Bee Colony Algorithm (Case study: Dez Reservoir in Khozestan)
ramtin
moeini
هیات علمی/دانشگاه اصفهان
author
فرناز
سقراطی
دانشجو/ دانشگاه اصفهان
author
text
article
2020
per
In this research, artificial honey bee colony algorithm, is used to solve single reservoir operation optimization problem. For this purpose, improved artificial bee colony algorithm is proposed using some modification in the basic algorithm. The simple and hydropower operation problems of Dez reservoir over 5 and 20 year time periods are solved using the proposed algorithm and the outputs are compared with the other available research results. In order to solve these problems, two different formulations are proposed in which the water release and storage volumes are considered as decision variables in the first and second formulations, respectively. If the first formulation of the improved artificial bee colony algorithm is used to solve the simple reservoir operation over 5 and 20 years, the objective function values are improved %9.94 and %55.266 than basic artificial bee colony algorithm, respectively. If the second formulation is used to solve simple reservoir operation over 5 and 20 years, the objective function values are improved %14.63 and %7.18 than basic artificial bee colony algorithm, respectively. In addition, if the first formulation of improved artificial bee colony algorithm is used to solve hydropower reservoir operation over 5 and 20 years, the objective function values are improved %7.76 and %26.47 than basic artificial bee colony algorithm, respectively. If the second formulation is used to solve hydropower reservoir operation over 5 and 20 years, the objective function values are improved %3.79 and %25.49 than basic artificial bee colony algorithm, respectively.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
109
121
https://water-soil.tabrizu.ac.ir/article_12164_3be901869bc1d21bde42bae1ee34febe.pdf
Determination of Groundwater Potential Using WetSpa Hydrological Model, GIS and RS Techniques and Analytical Hierarchy Process (Case Study: Balukhluchay Watershed, Ardabil)
Rasool
Imani
دانشجوی دکتری آبخیزداری دانشگاه کاشان
author
Hoda
Ghasemieh
عضو هیئت علمی دانشگاه کاشان
author
text
article
2020
per
Due to the importance of groundwater potential maps in exploration, exploitation and management of groundwater resources, groundwater potential map of Balukhluchay watershed was prepared in this study. Therefore 12 sub-criteria from 6 criteria, which affecting infiltration and groundwater recharge, were used. Criteria and sub-criteria maps were prepared in raster format using existing base maps, WetSpa hydrological model and also RS and GIS techniques. Criteria and sub-criteria weights were determined using analytical hierarchy process and groundwater potential map was prepared by combination of criteria and sub-criteria maps baced on assigned weights. Results showed that 10.53 and 14.61 percent of the study area has high and good groundwater potential respectively which is located in eastern and south-western part of watershed and are in relation with permeable rocks and low slope. Also more than 50 percent of the area has low groundwater potential which is in relation with low-permeable rocks located in steep mountainous hills.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
123
137
https://water-soil.tabrizu.ac.ir/article_12165_6d39e9b57912f210f3225295b6c397b1.pdf
Scour Hole Geometry Surveying in Plunge-Pool Downstream of Siphon Spillway
Arash
Khairollahi
Department of civil engineering, ramhormoz branch, islamic azad university, ramhormoz, iran
author
mehdi
fuladipanah
دانشگاه آزاد اسلامی
author
text
article
2020
per
One of the economical energy dissipater structures applying in high spillways is flip-bucket which falling flow causes scouring in plunge-pool at downstream. In this research, the bed variation as a scour hole at the downstream of a siphon spillway has been investigated. Dimensions and position of the scour hole were analyzed both experimentally and theoretically. The experimental results showed that the maximum scour hole depth was a function of discharge rate and downstream tail water depth. Also, flip-bucket angle had the most significant effect on distances of upstream hill and scour hole bottom from the spillway. It was found that the scour hole length, distances of downstream hill end point and maximum scour from the spillway were affected by the hydraulic conditions but they were less effected by the flip bucket angle and bed particle size. Also, it was seen that the flip bucket angle had a significant effect on upstream hill height. The height of downstream hill height was a function of flow discharge and tail water. Applying Buckingham π-theory, three variable linear equations were extracted to predict the dimension and situation of the scour hole and hills. The comparison between the measured versus the predicted values showed a good agreement between them.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
139
152
https://water-soil.tabrizu.ac.ir/article_12166_89c30604313f2ccbecf3d7a5f819104e.pdf
Investigating the Effects of Climate Change on Groundwater (Case Study: Sarab Plain)
رقیه
احمدی فر
دانشجو
author
مرتضی
موسوی
دانشگاه صنعتی خواجه نصیرالدین طوسی
author
مجید
رحیم زادگان
دانشگاه صنعتی خواجه نصیرالدین طوسی
author
text
article
2020
per
Climate change phenomenon has caused considerable changes in surface water and groundwater resources during the recent years. Groundwater is one of the important resources of the fresh water in every region and it is very important to investigate the effect of climate change on it. In this study, the effect of climate change on water table changes in Sarab plain aquifer in the future time period of 2021-2050 was investigated using Atmosphere-Ocean General Circulation Model (AOGCM). For this means, the climate change data resulted from 16 models of AOGCM-AR4 under the emission senarios of A2 and B1 during two time periods of 1986-2015 and 2021-2050 were weighted for the studied area. Based on the weights of the climatic models and the amounts forecasted data by them for the future time period, the variations of the precipitation and air temperature were calculated with the probabilities of 10, 50 and 90 percent. The statistical model of LARS-WG was used to downscale the amounts of precipitation and temperature for the future time period. Using the precipitation-runoff models of NARX and MODFLOW the daily magnitudes of the runoff and water table fluctuations were estimated too. According to the results, water table will be declined about 0.0 to 10 meters comparing to the year 2001 in most of the aquifer areas under both scenarios. This decreasing trend is more visible under the scenario B1 comparing to the scenario A2.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
153
166
https://water-soil.tabrizu.ac.ir/article_12167_eee48f325576c1b78ea144c320b3c3d9.pdf
Effects of Irrigation Frequency on Seed Yield, Oil Content and Yield Components of Oilseed Rape (Brassica napus L.)
Abolfath
Moradi
Assistant Professor, Soil and water research department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Iran
author
Mohammad Reza
Neyshabouri
Soil Science Department, Faculty of Agriculture, Tabriz University
author
text
article
2020
per
In order to determine the effects of irrigation frequency on grain yield, yield components, and seed oil content of oilseed rape (Brassic napus L.), a field experiment was conducted at agricultural research station of Haji Abad,Iran. Four irrigation frequency treatments including irrigating the crop after 50 (T1), 75 (T2), 100 (T3) and 125 (T4) mm cumulative evaporation from a class A evaporation pan, were arranged in a randomized complete block design (RCBD) with three replications. Results showed that among the studied parameters, grain yield and 1000-garin weight (p < 0.01), and number of pods per plant (p < 0.05) were significantly affected by irrigation frequency. However, the pod length, number of grain per pod, oil concentration in the grain, and crop height were not affectd significantly. The T1 and T2 treatments had significantly higher grain yield, 1000-garin weight and number of pods per plant than the T3 and T4 treatments.There was no significant difference between T1 and T2 treatments for all of the studied parameters. However, T2 resulted in higher WUE than T1. It appears that canola irrigation after 75 mm cumulative evaporation from calss A evaporation pan which is equivalent to the irrigation frequencies of 14, 20 and24 days in November, December and January respectively, 16-20 days in February to early April and 9 days in late April to early May, would be approperiate and may be recommended for Haji Abad region.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
167
177
https://water-soil.tabrizu.ac.ir/article_12168_ec947861c6d1c71c1dbff3c237091d52.pdf
The Effect of Converting Furrow Irrigation to Drip on Water Consumption, WUE and Growth Traits of Sultana Grapevine
sajad
ghasedi yoolgonolu
Departman of agronomy, grape faculty, malayer university, hamedan, Iran
author
hamid
zareabyaneh
Associate Professor of Department of Irrigation and Drainage, Faculty of agriculture, Bu Ali University
author
mohamad ali
nejatian
Associate Professor College of Agriculture & Natural Resources, Qazvin, Iran
author
ruhollah
karimi
Assistant Professor Faculty of Agriculture, Malayer university, Malayer, Hamedan
author
masumeh
maleki
Assistant Professor Faculty of science, Malayer university, Malayer, Hamedan,
author
text
article
2020
per
In order to evaluate switching the furrow to drip irrigation methods on stem length, WUE and depth of root zone of Sultana grapevines, an experiment was conducted based on randomized complete block design with four replications in 2015-2016 growing season. Treatments of experiment were including furrow (I1), compound of drip and furrow irrigation (I2), bubbler irrigation (I3), drip irrigation 1 (I4), compound of surface and sub-surface drip irrigation (I5), drip irrigation 2 (I6) and drip irrigation 3 (I7). The results showed that the drip irrigation treatments cause decreasing the stem length, leaf area and water consumption compared to the furrow irrigation significantly; Thereby, the average of parameters which are including stem length, leaf area in a vine and irrigation volume are 133 cm, 11.1 m2/vine and 5337m3/ha, respectively, these mentioned parameters for drip irrigation systems are 121 cm, 6.5 m2/vine and 3625 m3/ha, individually. The results indicated that there was positive correlation (R2) between the mentioned parameters. The treatments of I6 and I7 had respectively 31 and 29 ton/ha yield and more than furrow irrigation with 24 ton/ha; However, the other drip irrigation treatments showed less yield than furrow irrigation. The maximum and minimum of water used efficiency (WUE) belonged to I6 treatment with 10.3 kg/m3 and the I1 with 4.9 kg/m3 respectively. . In the end of experiment, taken samples from the vine roots revealed drip irrigation systems caused to create shallow root.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
179
192
https://water-soil.tabrizu.ac.ir/article_12169_757bff8108ed83aecb9d020c1612b9ef.pdf
The effects of flow division angle in rectangular channel branches
Majeid
Heydari
water Department, BuAli sina university, hamadan, iran
author
saeid
shabanlou
Water Engineering Department, Kermanshah Branch, Islamic Azad University, Kermanshah
author
text
article
2020
per
Generally, intakes are used for transferring and diverting the flow within main channels and rivers. In current study, flow field was simulated using FLOW-3D software. In addition, to model the flow free surface variations were predicted using the Volume of Fluid (VOF) scheme. The flow field turbulent was estimated by standard k-ε and RNG k-ε turbulence models. For instance, the MAE value for standard k-ε and RNG k-ε turbulence models were respectively computed 0.166 and 0.201. The modeling results showed that the numerical model simulated the flow field with acceptable accuracy. For example, the RMSE, MAE and R values for flow free surface simulation were calculated 0.164, 0.158 and 0.997, respectively. Then, the effects four flow division angles (30, 45, 75 and 90 degree) on flow field pattern were considered. As regarding the modeling results, the highest depth-averaged velocity for model 45 degree was obtained. Among models with division angle 30, 45 and 75 degree, maximum shear stress for model 45 degree was predicted.
Water and Soil Science
University of Tabriz
2008-5133
30
v.
1
no.
2020
193
204
https://water-soil.tabrizu.ac.ir/article_12170_b5272dbc6478203688bca0387527effc.pdf