Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Raingauge Network Evaluation Using the Discrete Entropy
(Case Study: Great Karoun Basin)
1
13
FA
Morteza
Fani
دانش آموخته کارشناسی ارشد- مهندسی منابع آب، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه آزاد اسلامی شیراز
Somayeh
Khalife
دانش آموخته کارشناسی ارشد- مهندسی منابع آب، گروه مهندسی آب، دانشکده کشاورزی ، دانشگاه شهید باهنر کرمان
Ebrahim
Khalife
دانشجوی دکترای عمران، گروه آب، دانشکده عمران، دانشگاه صنعتی خواجه نصیرالدین طوسی
Mohammad
Aflatooni
استاد یار بخش مهندسی آب ، دانشکده علوم کشاورزی، دانشگاه آزاد اسلامی شیراز
10.22055/jise.2016.11788
Quality of rainfall information for a given watershed or region is primary information needed for the sustainable designing and operation of water resources systems. For an optimal rainfall network design, they should be reviewed periodically based on the information needs and future water resources development plans. This study evaluated regional values of raingages in great Karoun basin located in Khozestan , Iran, using the discrete entropy. Discrete entropy can overcome limits of data normality assumption in past research and applications for hydrological variables. To determine the regional value of each station within a region, several information parameters such as marginal entropy, joint entropy and transinformation index between stations, were calculated to identify essential raingauge and critical area. Sensitivity analysis to number of discrete intervals showed that the entropy is sensitive to changes, but the ranks based on entropy indices appear to be less sensitive. Finally, results confirm that the entropy is useful to characterize the essential and excess station in the region and density of 31 raingauge network is optimal and other raingauge can be removed from monitoring network.
Evaluation,Entropy theory,Discrete intervals,Raingauge network
https://jise.scu.ac.ir/article_11788.html
https://jise.scu.ac.ir/article_11788_5e14ab662097fa231aaeb22723cf0ede.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Experimental Study of the Effect of Spur Dike Permeability and Angle on Scour Hole Dimensions in Non-Submerged Conditions
15
24
FA
Pooya
Ehdaei
نویسنده مسئول، دانشجوی کارشناسی ارشد مهندسی عمران- مهندسی رودخانه ، گروه سازه های آبی، دانشکده مهندسی علوم آب ، دانشگاه شهید
چمران اهواز
pouya_ehdaei@yahoo.com
Seyed Mahmoud
Kashefipour
استاد گروه سازه های آبی ، دانشکده مهندسی علوم آب ، دانشگاه شهید چمران اهواز
10.22055/jise.2016.11789
Spur dike is a hydraulic structure which has an essential role in reducing the shear force on river banks. The interaction between the structure and flow makes vertical and horizontal vortices, which are the main reason for producing a local scour hole around spur dike and finally damaging it. The behavior of the flow around a spur dike and the intensity of degradation and aggradation depend on different factors such as the type of the spur dike, its position, its angle with the bank, and some other parameters. One of the most important factors is the permeability of the spur dike. This experimental study focuses on the effect of spur dike’s angle and its permeability on scour hole dimensions in non-submerged conditions. According to the results, when permeability increased up to 50%, scouring decreased significantly. For Fr=0.24, and in the vertical position of spur dike (90 degrees) with 50% permeability, relative depth, length, and width of the scour hole decreased 67%, 75.3% and 45.5%, respectively in comparison with impermeable spur dike. Also for the angle of 120 degrees, relative depth, length and width of the scour hole declined 64.1%, 72.1% and 35.4%, respectively. Similar results were obtained for the angle of 60 degrees with the reduction of relative depth, length and width of the scour hole being measured 60.2%, 68.7% and 38.8%, respectively. In addition, for 50% permeability, the highest level of scouring was for the angle of 60 degrees, whose average relative depth, length, and width were 0.19, 0.7 and 1.2, respectively.
Spur Dike,Scour,Permeability
https://jise.scu.ac.ir/article_11789.html
https://jise.scu.ac.ir/article_11789_182f8ad01e9a556ad33ba4fc07b833d0.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Evaluation of Maize Response to Salinity under Drip Irrigation and Irrigation Management
25
32
FA
Ali Heidar
Nasrolahi
دانشجوی دکترای آبیاری و زهکشی دانشگاه شهید چمران اهواز
aliheidar200@gmail.com
Abdilrahim
Houshmand
0000-0002-5722-5054
دانشیار گروه آبیاری و زهکشی دانشگاه شهید چمران اهواز
hooshmand_a@scu.ac.ir
Saeid
Broumand nassab
استاد گروه آبیاری و زهکشی دانشگاه شهید چمران اهواز
saeedboroomand@yahoo.com
10.22055/jise.2016.11790
In addition of water shortage and high<br />temperature, severe salinity of soil and water also causes problems in arid and semi-arid<br />areas. In these areas, drip irrigation can overcome on environmental<br />limitations for sustainable crop production. To study the response of maize to salinity under<br />drip irrigation and irrigation management, was carried out an experiment at split plots based on randomized<br />complete block design. In this research, main plots were both irrigation management strategies of blending and one-alternate of saline water (4, 5 and 6 ds/m) with Karoun river<br />and subplots were treatments of water salinity. The results showed that by increase in salinity,<br />maize yield, biomass, height, 1000-grains weight and irrigation water<br />productivity decreased. The<br />blending strategies of fresh and saline water improved grain yield and water productivity in<br />levels of high salinity. Fainally, the rate of yield decrease for every 1 ds/m<br />increase in salinity of soil was about 9 percent
Drip Irrigation,Water productivity,Salinity,Maize
https://jise.scu.ac.ir/article_11790.html
https://jise.scu.ac.ir/article_11790_ffc0b346dd3e963fb4cc4e5bef0e44cc.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Experimental Study on The Arrangement Effect of Cylindrical Obstacles on Saline Density Current body
33
45
FA
Ali Akbar
Ghrban Moghadam
دانشآموخته کارشناسی ارشد سازه های آبی، دانشگاه شهید چمران اهواز
Mehdi
Ghomeshi
0000-0002-8361-1645
استاد سازه های آبی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز
m.ghomeshi@yahoo.com
10.22055/jise.2016.11791
Density currents occur when fluid of one<br />density propagates into a fluid of different density. These currents are the main caude for<br />sediment transport in dam reservoirs and estuaries. The<br />negative effects of density currents can be minimized using obstacles. The<br />obstacles can totally or partially block density currents and thus<br />sedimentation will occur far from the dams.<br />In this paper, the effect of cylindrical obstacles and their arrangement on<br />density current body is experimentally studied. Obstacles with constant<br />diameter and height were glued on the bed in staggered form. The staggered form<br />were constant during all the experiments, but transverse longitudinal distances<br />between obstacles were variable. It caused two beds with different arrangement<br />of obstacles. The results indicated that rate of mixing in bed with obstacles<br />is greater than bed without obstacles. So velocity and height of head<br />in bed with obstacles decrease about 40 present
Density current,flow Body,Cylindrical obstacles,Obstacles arrangement
https://jise.scu.ac.ir/article_11791.html
https://jise.scu.ac.ir/article_11791_c5f4fe5ffb57c8bc00144804a7e80daa.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
The performance Evaluation of Travelling Gun Irrigation System implemented in Esmatyeh Farm of Qom
47
61
FA
Mohammad mehdi
Doust Mohammadi
دانشجوی کارشناسی ارشد آبیاری و زهکشی دانشگاه شهید چمران اهواز
Amir
Soltani Mohammadi
0000-0002-9861-6545
استادیار گروه آبیاری و زهکشی دانشگاه شهید چمران اهواز
a_soltani60@yahoo.com
Saeid
Broumand nassab
استاد گروه آبیاری و زهکشی دانشگاه شهید چمران اهواز
saeedboroomand@yahoo.com
10.22055/jise.2016.11792
One of the main purposes of sprinkler irrigation is the uniform distribution of water in the farm in order to supplying crop water and preventing wasting water. Travelling Gun irrigation system is a kind of sprinkler irrigation that is always mobile and irrigates farm in border-like manner. Esmatyeh Farm is one of the dedicated lands of Holly Shrine of Hazrat Fatemeh Masumeh where Travelling Gun irrigation system has been implemented. This irrigation system is 290-85 TX model with the diagonal of 85 mm Polyethylene and length of 290 m. The employed sprinkler is BIG GUN-SR 150 model, nozzle size of 17.8 mm made by NELSON Corporation. For the performance evaluation of this system, in the summer, June 2013, an investigation was carried out in two ways: Fixed Cart (3 repetitions) and Mobile Cart (4 repetitions). Therefore, coefficient of uniformity, distribution of uniformity, adequacy of irrigation, application efficiency of low quarter, application efficiency and wind drift and evaporation were determined. The results showed that in fixed Cart way, the deep of water on the ground decreases to the distance of 10 m from the Cart centre. Within the distance of 10-20 m from the Cart, the amount of water on the ground increases and will have the maximum amount in the distance of 20-30 m. The average of coefficient of uniformity in fixed Cart way was 61 percent and the average of distribution of uniformity was 44.8 percent. The average amount of water on the ground was 10.1 mm and the average of wind drift and evaporation in Trimmer method was 1.4 percent. In mobile Cart way, the difference between wind drift on the left and right side of the Cart indicate the effect of wind on the water distribution on the ground. The average of wind drift and evaporation in Trimmer method and fixed Cart way was 1.6 percent and in the mobile Cart way was 2.5 percent. The average of coefficient of uniformity was 65.1 percent and the average of distribution of uniformity was 48.3 percent which indicate that coefficient of uniformity is appropriate in Esmatyeh Farm. The average of distribution of uniformity in aforementioned farm is not appropriate and indicates of inappropriate of water distribution in the farm. The average of adequacy of irrigation was calculated as 66.7 percent. The average of application efficiency of low quarter calculated 24.7 percent and application efficiency was 48.8 percent.
Traveling Gun,Coefficient of uniformity,Distribution of uniformity,Wind drift,Esmatyeh Farm
https://jise.scu.ac.ir/article_11792.html
https://jise.scu.ac.ir/article_11792_262f49bf943fb4ce89e735d5d65515e4.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Summer Maize Irrigation Scheduling Under Surface and Sprinkler Irrigation Using CWSI in Ahvaz Climatie Condition
63
73
FA
Maryam
Ghorbani
دانشآموخته کارشناسی ارشدآبیاری وزهکشی ، دانشکده مهندسی علومآب ، دانشگاه شهید چمران اهواز
maryamghorbani688@yahoo.com
Saeid
Broumand nassab
استاد گروه آبیاری و زهکشی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز
saeedboroomand@yahoo.com
Amir
Soltani Mohammadi
0000-0002-9861-6545
استادیار گروه آبیاری و زهکشی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز
a_soltani60@yahoo.com
Sohrab
Minae
دانشآموخته دکتری آبیاری وزهکشی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز
minaei50@yahoo.com
10.22055/jise.2016.11793
Use of canopy temperature for plants irrigation scheduling is one of the methods that have been attention by researchers. Several indexes have been provided for this method and one of them is Idso index . This research intends to investigate irrigation scheduling of summer maize using canopy temperature in Ahvaz climate in farming years 2013-2014 (summer cultivation) under sprinkler (fixed irrigation system) and surface irrigation with five levels of salinity irrigation water (S1, S2, S3, S4 ,S5). The experiment had three replications. Based on the obtained results, The CWSI for sprinkler irrigation in september and october estimated 0. 14 and 0.18 respectively. Also for surface irrigation in september and october estimated 0.14 and 0.15. Calculated equation for lower base in sprinkler and surface irrigation present less water stress in surface irrigation than sprinkler irrigation. of course, this does not mean that sprinkler irrigation has been stressed, but in these two types of irrigation CWSI values indicate non-stress conditions for both irrigation. By using of measured data for scheduling irrigation maize in octobar and september with sprinkler and surface irrigation methods, some equations was determind.Than by using of the equations and comparing difference between leaf and air temperature measured by leaf and air temperature calculated can detect time of irrigation.
Irrigation scheduling,Surface and sprinkler irrigation,CWSI,Infrared temperature,Maize
https://jise.scu.ac.ir/article_11793.html
https://jise.scu.ac.ir/article_11793_fa33dcce9c4785916cd84f4d2f87c310.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Comparison of Time Series Methods and Artificial Neural Networks
In Reference Evapotranspiration Prediction (Case Study: Urmia)
75
85
FA
Nasrin
Azad Talatapeh
دانشجوی کارشناسی ارشد آبیاری و زهکشی، دانشکده کشاورزی، دانشگاه ارومیه
Javad
Behmanesh
دانشیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ارومیه
j.behmanesh@urmia.ac.ir
Mojtaba
Moktaseri
دانشیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ارومیه
Vahid Reza
Verdi Nejhaz
استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ارومیه
10.22055/jise.2016.11794
Evapotranspiration is one of the important factors in water resources consumption in the agriculture part. Therefore, presenting a method which gives suitable and accurate prediction of reference evapotranspiration can help to take optimum decision for water resource programing. In this research, time series and artificial neural networks methods were compared each other in order to predict the monthly reference evapotranspiration in Urmia synoptic station. To achieve this goal, at the first step, the best time series model between AR and ARMA models and the best artificial neural networks model between radial basis function (RBF) and multilayer perceptron (MLP) neural networks were selected. In the second step, the two models chosen were compared each other. In the mentioned artificial neural networks, the deferent monthly lags of reference evapotranspiration were used as network input. In this process, the monthly reference evapotranspirations were computed from 1971 to 2010 using FAO Penman-Monteith method. The mentioned dates from 1971 to 2005 were used to select the best time series model and the best structure of networks and the dates from 2006 to 2010 were utilized to compare the methods used. The results showed that the AR(11) model has the best performance among other time series models and the RBF model has the lower error than the MLP model. The comparison of the best time series model (AR(11) model) with the best artificial neural networks model (RBF model) showed that the RBF model could predict the reference evapotranspiration by the lowest error from 1971 to 2010 period. The root mean square error in AR(11) and RBF models was obtained 1.85 and 0.999 mm/month respectively.
Reference Evapotranspiration,Radial basis function networks,Multilayer perceptron
neural networks,Time series models
https://jise.scu.ac.ir/article_11794.html
https://jise.scu.ac.ir/article_11794_584fef9d6296525262ee87b7a125f264.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Estimation of Soil Hydraulic Conductivity using DRAINMOD Model and Comparison with the other Conventional Method (Case Study; Khuzestan Province, Shavoor Plain)
87
96
FA
Mona
Golabi
Assistant Professors, Irrigation and Drainage Department., Faculty of Water Science Engineering, Shahid Chamran University of Ahvaz, Iran.
mona_golabi@yahoo.com
Mohammad
Albaji
Assistant Professors, Irrigation and Drainage Department., Faculty of Water Science Engineering, Shahid Chamran University of Ahvaz, Iran.
m_albaji2000@yahooq.co.uk
Abed Ali
Naseri
Professors, Irrigation and Drainage Department., Faculty of Water Science Engineering, Shahid Chamran University of Ahvaz, Iran.
10.22055/jise.2016.11795
In order to design irrigation and drainage networks, it is necessary to determine soil hydraulic conductivity. There are several methods for measurement hydraulic conductivity, which the types of methods are depending on the situation of land. Existing methods are often time-consuming and expensive, so it is recommended the use of simulation models. According to the importance of the determination hydraulic conductivity, in this study using data of Shavoor plain water table depth and discharge were simulated with DRAINMOD model. Then, by simulated values of the discharge and water table depth was estimated the amount of hydraulic conductivity with inverse method. Finally, the results were compared with Ernest method. Results showed that according to the statistical indexes hydraulic conductivity is 2 and 2.5 (m/day) for study area. Comparison between these amount and average of hydraulic conductivity, that were measured with Ernest method (2.3 m/day) represented acceptable estimate of hydraulic conductivity with DRAINMOD model.
DRAINMOD model,Hydraulic conductivity,Water table depth,Discharge,Ernest method
https://jise.scu.ac.ir/article_11795.html
https://jise.scu.ac.ir/article_11795_d41d8cd98f00b204e9800998ecf8427e.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Simulation of Runoff in Rood Zard Basin using Arc Swat Model
97
107
FA
Mohammad Reza
Ansari
مربی دانشگاه کشاورزی و منابعطبیعیرامین خوزستان
Manoochehr
Gorji
دانشیار گروه مهندسی علوم خاک دانشگاه تهران
Gholam Abbas
Sayad
استادیار گروه مهندسی علوم خاک دانشگاه شهید چمران اهواز
Mehdi
Shorafa
دانشیار گروه مهندسی علوم خاک دانشگاه تهران
m_shorafa@yahoo.com
Kazem
Hemadi
دکترای هیدرولوژی سازمان آب و برق خوزستان
hemmadi.kazem@gmail.com
10.22055/jise.2016.11797
A lot of watersheds in Iran do not have sufficient hydrometry stations. Also because of limited accessibility to hydrologic data in more stations, watershed modeling plays a vital role in development of water resources, and this is a subject to large uncertainties. In this research, Soil and Water Assessment Tool (SWAT) model was used for runoff simulation of Rood Zard basin. Model sensitivity analysis, calibration, uncertainty and validation analysis was carried out using Sequential Uncertainty Fitting, version2 (SUFI-2) program. The runoff data of hydrometric stations (Machin and Pol Manjanigh) were used for calibration and validation of the model.The model was run using daily precipitation and temperature data of seven rain gauge and synoptic stations for 15 years (1995-2009). The years (1997-2003) were used for calibration and of (2004-2009) were used for validation of the model. Uncertainty indexes (p-factor and d-factor), the coefficient of determination (R<sup>2</sup>) and Nash Sutcliffe (NS) were used to evaluate the ability of the SWAT model in simulation of runoff for both stations. These factors for calibration period at the Machin station were 0.92, 1.10, 0.85, and 0.85, respectively, and for the validation period, these statistics were 0.92, 0.85, 0.92, and 0.92 respectively.These factors at the Pol Manjanigh station for calibration period were 0.72, 0.99, 0.83, and 0.82, respectively, and for the validation period, these statistics were 0.70, 0.76, 0.79, and 0.78, respectively. The reasons for the weak simulation of runoff at some months of the year might be due to weak simulation of snowmelt in this mountainous watershed, disconformity of model’s suppositions to transfer flow in saturated and frozen soil layers, as well as uncertainty and lack of enough data. Overall results showed that the model can simulate the runoff properly in both stations. It is recommended to use this model instead of empirical models for estimating runoff and sediment basins country.
Runoff,SWAT model,Sensitivity analysis,Calibration,validation,Uncertainty,Rood
Zard basin
https://jise.scu.ac.ir/article_11797.html
https://jise.scu.ac.ir/article_11797_9bb7601324bfb38e3c91c63155e6cd5b.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Analysis of Severity, Duration, Frequency and Zoning Map of Meteorological Drought of Bakhtegan River Basin
109
123
FA
Shahin
Tabouzadeh
دانش آموخته، کارشناسی ارشد مهندسی منابع آب دانشگاه شهید چمران اهواز
shahintbz@gmail.com
Heidar
Zarei
0009-0008-8384-292X
استادیار، گروه هیدرولوژی و منابع آب، دانشکده مهندسی علومآب، دانشگاه شهید چمران اهواز
zareih@scu.ac.ir
Om albanin
Bazrafshan
استادیار، گروه مرتع و آبخیزداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه هرمزگان
10.22055/jise.2016.11799
Drought is the most important and most destructive climatic phenomena that impact is usually more important at a regional scale. This is important because the basin as Bakhtegan strategic situation of the region, the extent of farming lands and Bakhtegan - Tashk lake is obvious. The aim of this paper is drought monitoring using of standardized precipitation index and analysis of drought characteristics in timescale 3, 6, 12, 24 and 48 monthly and duration- frequency and magnitude – frequency. Also map zoning duration and magnitude drought in 20 return periods, analysis of maps drought occurred in the period of greatest intensity within the same period of 30 years (1981-2010) and precipitation and temperature trend is other objectives of this study. Result shown continuously from 2001 onwards, the case study suffered repeated droughts have been significant and stations located in the central and southern basin, bear continuation of a longer and more severe droughts, a higher frequency than the other stations. Curves of duration – return period and magnitude - return period of the scales showed that with increasing time scale and return period on the station, duration and magnitude drought increased. Analysis of duration and magnitude map zoning with 20 years return period shown that duration longer than is eastern region and magnitude higher than is southern and central region. Study of the highest severity drought shown that very severity drought imported from central and south region and exited from north.
Drought,Duration- frequency,Magnitude – frequency,Map zoning,Standardized
precipitation index
https://jise.scu.ac.ir/article_11799.html
https://jise.scu.ac.ir/article_11799_fc7b7851ce47811bcf29532fe4729fb9.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Investigation of Scour Depth Downstream of Stilling Basin for the Case of B-Jump
125
136
FA
Mahmoud
Shafai Bajestan
استاد گروه سازههای آبی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز
m-shafai@yahoo.com
Sedigheh
Omidi
دانشجوی کارشناسی ارشد سازههای آبی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز
sedy_omidi@ymail.com
10.22055/jise.2016.11800
Scour downstream of hydraulic jump stilling basins can damage the surrounding area and can cause failure of the structure itself. Because of the study of such phenomenon has attracted the attention of researchers in the past. In the present study by constructing a model of spillways and stilling basin, The effect of B-jump characteristics on downstream scour was investigated. A total of 20 tests under 4 different Froude numbers and 5 different of jump position were carried out. The results indicated that at any discharge, the scour depth and length is decreased as the B-jump started at higher level. When the B-jump started at 14% of spillway depth, the non-dimensional scour depth and scour length decrease 7% and 19% respectively. The non-dimensional height of point bar downstream of scour hole was increased by 49%. Comparison of the results obtains in this study with other investigators finding shows good agreement for the case of B-jump scour.
Scour,B-jump,Chuts
https://jise.scu.ac.ir/article_11800.html
https://jise.scu.ac.ir/article_11800_4d234e020bf1b97e80badc768fccd2fd.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Modeling the Effects of Salinity and Water Deficit Stress on Growth and Yield Parameters of Two cultivars of Canola
137
154
FA
Vahid
Yazdani
دکتری مهندسی آب و مدرس مدعو مجتمع آموزش عالی تربت جام
v.yazdany@yahoo.com
Kamran
Davari
دانشیار گروه علوم مهندسی آب، دانشگاه فردوسی مشهد
k.davary@gmail.com
Bijan
Ghahreman
استاد گروه علوم مهندسی آب، دانشگاه فردوسی مشهد
bijangh@um.ac.ir
Mohammad
Kafi
استاد گروه زراعت دانشگاه فردوسی مشهد
10.22055/jise.2016.11801
Change any of the environmental factors can basically have effect on processes on plant growth and ultimately on production and operation on crops. To study the combined effects of drought and salt stress on physiological characteristics of two varieties of Canola, a field experiment done in Mashhad (two kilometers to Ferdowsi’s tomb) with dry climate in split plot randomized complete block design with three replications. The main factor contains water stress (100, 125, 75 and 50 percent of water requirements, in order I<sub>1</sub>, I<sub>2</sub>, I<sub>3</sub> and I<sub>4</sub>), salinity irrigation water (0.5, 5, 8 and 11 dS/m in order S<sub>1</sub>, S<sub>2</sub>, S3, S<sub>4</sub>) and sub two Canola (Hyola 401 and RGS 003). Water stress and salinity decreased all the characteristics were evaluated. In separate combination salinity treatments and dehydration, effects of salinity water on reduction growth and yield are more than irrigation water and effect of low irrigation is less than the total effect of these tensions, that means in areas such as Mashhad, in low irrigation cannot use saline irrigation water for product Canola. The Hyola type (1801 kg/ha) more performance than RGS type (1326 kg/ha). RGS type in parameters of height, number of branches and dry weight is more excelence against Hyola, in reverse Hyola type significantly higher than RGS in yield and harvest index. The presented model more estimate LAI at the beginning and the end of the growing season, also in S<sub>2</sub>I<sub>4</sub>, S<sub>4</sub>I<sub>4</sub>, S<sub>3</sub>I<sub>4</sub> treatments model has more errors than other treatments. Intended model overestimation the Canola height at the beginning of the growth season and underestimated in the end. Estimation of dry weight in the RGS type is more than Hyola type. While the estimates of dry weight are more accurate than the weight. However, the present model adequate for predicting Canola yield under drought and salinity and can be used to predict the performance.
canola,Growth parameters,Salinity,Water Stress
https://jise.scu.ac.ir/article_11801.html
https://jise.scu.ac.ir/article_11801_97ec01c0c76a026c8501315f9ecbf7e2.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Multi-Objective Optimization of Selective Water Withdrawal from Reservoirs in Terms of Crisis Considering Environmental Temperature and Quality Remarks (Case Study: Amirkabir Dam)
155
164
FA
Masoud
Amirkhani
دانشجوی کارشناسی ارشد مهندسی منابع آب، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران
m.amirkhani12@ut.ac.ir
Omid
Bozorg Haddad
دانشیار گروه مهندسی آبیاری و آبادانی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران.
obhaddad@ut.ac.ir
Hosein Ali
Hassaniha
استادیار گروه مهندسی آب، دانشگاه زنجان، زنجان، ایران.
Amin
Soltani
دانشجوی کارشناسی ارشد سازههای آبی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران.
amin.soltani@ut.ac.ir
10.22055/jise.2016.11802
The use of water reservoirs causes imbalance in water temperature in rivers. Furthermore water reservoirs are always in danger of contamination by different types of pollution such as TDS especially during floods. This paper presents the effect of water withdrawal from two different levels on the quality of the output water in terms of pollution. Furthermore the best amount of discharge is selected for each level in order to minimize the amount of TDS (exiting the reservoir) and Temperature difference between inlet and outlet water. Results indicated that the use of two different output levels in terms of pollution Improves the objective function value compared to the use of a single output level. For example the application of two different output levels in spring can reduce the amount of pollution as much as 11.81%. In addition difference between inlet and outlet temperature was seen to decrease as much as 4.02%.
TDS,Withdrawal level,Objective functions,Difference between inlet and outlet temperature
https://jise.scu.ac.ir/article_11802.html
https://jise.scu.ac.ir/article_11802_dde3f39a2e516e1ee94a7e15233ab0e1.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Numerical Study of Position of T-Shaped Spur Dike on the Secondary Flow Strength Using SSIIM Software
165
175
FA
Vali Allah
Mohsenimehr
دانش آموخته کارشناسی ارشد مهندسی عمران، دانشگاه خلیج فارس، بوشهر، ایران
Mohammad
Vaghefi
دانشیار سازه های هیدرولیکی، گروه مهندسی عمران، دانشگاه خلیج فارس بوشهر، ایران
vaghefi52@gmail.com
Seyed Shaker
Hashemi
استادیار، گروه مهندسی عمران، دانشگاه خلیج فارس بوشهر، ایران
10.22055/jise.2016.11803
This paper aims to numerically simulate the effect of T-shaped spur dike position in a 90 degree bend channel on flow pattern with the rigid bed. The numerical model used in this article is SSIIM. Different positions of spur dike equal to 30, 45, 60 and 75 degrees were selected for a T-shaped spur dike with a ratio of length and wing equals to 1, and it was installed at the outer bank of the channel. The channel had a 2.4 m bend curvature radius. Three dimensional velocity components, secondary flow strength and flow patterns for various positions of spur dike were compared at different levels with Vaghefi’s experimental results. The result showed that secondary flow strength ranges between 12 to 15 percent in a 90 degree bend. The minimum and maximum percentages of secondary flow were consecutively at 30 and 75 degree positions of the spur dike installed.
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T- Shaped spur dike,Separation zone,Secondary flow strength,SSIIM
https://jise.scu.ac.ir/article_11803.html
https://jise.scu.ac.ir/article_11803_efbdf54f4c8caf66e50d558ab69ff4c3.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Studying the Trend of Changes in Precipitation - Discharge the Karkhe Rive Sub-Basin Using Non-parametric Methods, Case study: Kashkan Basin
177
188
FA
Ali Mohammad
Khourshid Doust
استاد دانشکده جغرافیا و برنامهریزی دانشگاه تبریز
Majid
Rezaei Banafsheh
دانشیار دانشکده جغرافیا و برنامهریزی دانشگاه تبریز
Hamid
Mir Hashemi
دانشجوی دکترای اقلیمشناسی دانشگاه تبریز
climate90@yahoo.com
Yousef
Kakolvand
دانشآموخته کارشناسی ارشد اقلیمشناسی دانشگاه تبریز
10.22055/jise.2016.11804
In general, the possible variability resulting from climate change in precipitation, soil moisture and surface runoff on natural systems and human populations will have a major impact. Thus, in this study using two non-parametric Man-Kendall and Sen’s estimator methods, basin discharge and precipitation trend Kashkan were examined agricultural water during 1968 - 2010. Analysis of the distribution of the data indicates that the occurrence time of peak flow in all rivers in the basin, the maximum precipitation event is part of the corresponding Madyanrvd. So that the peak rainfall in winter and are the peak discharge in spring. in this direction regard showed that the melting snow in the spring, an important factor in increasing the flow rate and cause inconsistent this season than any other season of the year is the time between precipitation and discharge. The results of the statistical tests revealed that both precipitation trend in the annual series of incremental stations and stations in the northern basin of the southern basin is decreasing. The scale seasonal precipitation trends in spring and in autumn and winter is decreasing, while the rate of annual and seasonal scale is decreasing. The findings showed that the displacement of the phase change in precipitation has occurred. In general, rainfall intensity change rate and review Kashkan geographic area indicates that this value can be attributed to precipitation changes the entire flow, but human intervention in the environment, changes in flow caused by intense precipitation in some branches of the critical phase.
Precipitation – discharge,Kashkan basin,Sen’s Estimator,Man – Kendall
https://jise.scu.ac.ir/article_11804.html
https://jise.scu.ac.ir/article_11804_2f5fb9ad534bcfea63bbc4c75e3e0a32.pdf
Shahid Chamran University of Ahvaz
Irrigation Sciences and Engineering
2588-5952
2588-5960
38
4
2016
01
21
Calibration of Shiono and Knight Model to Estimate Shear Stress
for Trapezoidal Channel
189
201
FA
Babak
Lashkar Ara
استادیار گروه مهندسی عمران دانشگاه صنعتی جندی شاپور دزفول
babak_lashkarara@yahoo.com
Iran Dokht
Dehghani
دانشجوی دوره کارشناسی ارشد مهندسی عمران دانشگاه صنعتی جندی شاپور دزفول
irandokht.dehghani@yahoo.com
10.22055/jise.2016.11805
Aim of this study is to calibrate Shiono and Knight model for better determination of shear and velocity distribution in trapezoidal open channels. To do this, correct estimation of friction factor (<em>f)</em>, secondary current (Γ), and eddy viscosity (λ) is proposed as key affecting parameters. Available data in literature are used to optimize these three parameters. Using channel aspect ratio <em>P<sub>b</sub>/P<sub>w</sub></em>, the channel subsections are selected. Non-dominated Sorting Genetic Algorithm is used to optimize the parameters and estimate shear and velocity distribution for each subsection. Results reveal that effects of friction factor and eddy viscosity are significant for aspect ratios of less than 2 and 6, respectively. Rate of change of the parameters with the aspect ratio show a considerable increase for aspect ratios of less than 4. In oppose to the literature for suggestion of a constant eddy viscosity of 0.67, calibration of the Shiono and Knight model in this study showed a variable eddy viscosity for variable flow conditions. Comparison of the model and experimental results confirms correct estimation of the aforementioned parameters. <br />
Shiono and Knight Model,Shear Stress,secondary flow,Eddy viscosity,Trapezoidal channel
https://jise.scu.ac.ir/article_11805.html
https://jise.scu.ac.ir/article_11805_88daad92a2b85e052f754f7879c66580.pdf