Evaluation of EVALUE, SIPAR_ID and INFILT Models for Estimating of Kostiakov infiltration parameters in Furrow Irrigation
H.
Ramezani Etedali
Dept. of water engineering, Imam Khomeini International University
author
H.
Ebrahimian
Dept. of Irrigation and Reclamation, University of Tehran
author
F.
Abbasi
Agricultural Engineering Research Institute, Karaj
author
A. M.
Liaghat
Dept. of Irrigation and Reclamation, University of Tehran
author
text
article
2012
per
Estimationof infiltration parameters is very difficult in furrow irrigation while theyhave very important effect in design and evaluation of surface irrigationsystems. There are different methods for estimating infiltration parametersbased on mathematicalmodels such as EVALUE, SIPAR_ID and INFILT. EVALUE model uses direct solutionwhereas two other models are based on inverse solution. The objective of thisstudy is to evaluate these models to estimate infiltration parameters in furrowirrigation. Twelve data sets of experimental blocked-ended and free drainingfurrows were used in this assessment. The data sets were under different conditions, e.g. length, slope, andflow regime. Using the estimatedinfiltration parameters, the total infiltrated volume was predicted to evaluatethe accuracy of the mathematical models. The results indicated that EVALUE andSIPAR_ID provided the lowest errors for estimating the infiltrated volume withRMSE 1.86 and 1.78 m3 at blocked furrows, respectively. At freedraining furrows, SIPAR_ID with RMSE 1.11 m3 has the best result.The models specifically INFILT with RMSE, 1.63 m3 provided loweraccuracies in cutback flow regime relative to continuous flow.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
1
10
https://jise.scu.ac.ir/article_10495_fd19bf0decc6e0fb3e0751d3b239b016.pdf
Dissolved Solids Removal from Water by Reed and Sugarcane Straw Activated Carbon
M.
Farasati
Professor, Department of Irrigation and Water Resources Engineering, Faculty of Agriculture, Razi University, P.O. Box: 1158, post code: 6715685438, Kermanshah, Iran
author
H.
Moazed
Associate Professor, Water Sciences Engineering Faculty, Shahid Chamran University, Ahwaz, Iran.
author
S.
Boroomandnasab
Professor, Water Sciences Engineering Faculty, Shahid Chamran University, Ahwaz, Iran.
author
J.
Abedi Kupaee
Associate Professor, Agricultural Faculty, Isfahan University of Technology, Isfahan, Iran
author
N.
Jafarzadeh
Associate Professor, Environmental Technology Research Center, Ahvaz Jundi Shahpur University of Medical Sciences, Ahvaz, Iran.
author
text
article
2012
per
In this study, activated carbons of reed and sugarcane sawdust are used as adsorbents to remove dissolved solids from water. The objective of this research work were to various evaluate the effects of adsorbent type, amount and total dissolved concentration on the sorption capacity, sorption properties and removal efficiency of the two used adsorbents. Results of the study indicated that optimum value of sorbent was 1600 mg/l and maximum removal of TDS belongs to the sugarcane sawdust activated carbon with 75 removal percentage. The removal percentage of TDS from water by sugarcane sawdust and reed carbons, are 63 and 57 respectively. Because the materials for preparing activated carbon of sugarcane sawdust are cheep and it has high removal efficiency for TDS as a result it could be concluded that sugarcane sawdust activated carbon would be good replacement for activated carbon.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
11
20
https://jise.scu.ac.ir/article_10496_0e1a989de4e198cf75194fab62b9f838.pdf
Application of Different Geostatistical Methods for Interpolation of EC and SAR Values in Groundwater with Emphasis on Basin Infiltration Changes
M.
Naderianfar
PhD Student, Water Engineering Department, Ferdowsi University of Mashhad
author
B.
Ghahreman
Professor, Water Engineering Department, Ferdowsi University of Mashhad
author
H.
Ansari
Assistant Professor, Water Engineering Department, Ferdowsi University of Mashhad
author
M.
Salari
MS. Student, Water Engineering Department, Zabol University
author
text
article
2012
per
Awareness from spatial variability of quality parameters is important tool for understanding the region talent and how to manage of land. So in this research to analysis electrical conductivity and the ratio of absorption of sodium in groundwater using Earth statistical methods. For this purpose, information dependent on analysis of 169 wells of water in Neyshabour plain with climate of semi arid is based on last sampling in 1386 were used. Earth statistical methods used For Zoning parameters listed include Ordinarykriging, Logkriging, Cokriging, IDW and SPLINE model. for evaluation of methods are used from cross validation techniques with Standards of MAE, MBE, RMSE and R2 Between actual and estimated data. Studies have shown that spatial correlation in EC and SAR is so very in Neyshabour plain. Results of EC and SAR maps using Cokriging and exponential and spherical model showed areas of North East Plains, aquifer is located under the influence of surface and groundwater supply, include values EC less than 1.5 dS/m and 2.5 mg/lit, the aquifer quality in above mentioned range towards the plain central regions gradually decreased and within the granule regions of aquifer (South and West regions of aquifer) formation of the alluvium is not desirable, EC and SAR values will increase in this range is higher than 12 dS/m and18 mg/lit. Finally, the quality of Neyshabour plain groundwater from viewpoint EC and SAR in terms of impact on soil permeability was investigated. The EC and SAR anomaly maps were drawn and shown that with increasing salinity levels in water drop pezometer correlated.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
21
34
https://jise.scu.ac.ir/article_10497_40a99c41b6922ed8b80fd8d312cb059d.pdf
Experimental Comparison of Discharge Coefficient for Mesh Panel Bottom Intakes With and Without Sediment
K.
Bina
Assistant Professor, Civil Eng. Dept., Khavaran Institute of Higher Education
author
M.
Faghfoor Maghrebi
Professor, Civil Eng. Dept, Ferdowsi Univ. of Mashhad
author
J.
Abrishami
Associate Professor, Civil Eng. Dept., Ferdowsi Univ. of Mashhad
author
text
article
2012
per
Bottom rack is ahydraulic structure which is placed on the bed of mountainous rivers throughwhich part of flow in the main channel is diverted. These structures have verywide application in industry, irrigation, drainage and etc. The present studywas directed to estimate the discharge coefficient of a new kind of bottomracks including both transverse and longitudinal bars which is named "meshpanel racks" with and without considering solids in the fluid. This kindof bottom intake has advantages from structural point of view and has lessdeformation under static and dynamic loads. Laboratory setup with three meshpanel intakes was built and the effects of various parameters such as racksslope, porosity and geometry, sediment size and sediment grading were explored.A dimensional analysis using Buckingham theory showed the effective hydraulicand geometric factors that affect the discharge coefficient (Cd) ofbottom racks. Then, a statistical approach to determine the dischargecoefficient of a rack structure was developed with linear and nonlinearregression using SPSS software. Finally, hydraulic performance of mesh panelintakes was compared with and without sediment.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
35
48
https://jise.scu.ac.ir/article_10498_eef1f813d931ce9de589f4df1b7186fb.pdf
Interpolation of Soil Salinity and Evaluation of Salinity Risks in Meiankangi Region (Sistan) Using Geostatistical Methods
M.
Kayedani
MSC., Irrigation and Drainage
author
M.
Delbari
Assistant Professor, Water Engineering Department, Zabol University
author
text
article
2012
per
Soil salinity is one of the important soil properties that has asignificant effect on many processes such as plant grows. The objectives ofthis paper are to estimate soil salinity and to map the salinity risk inMeiankangi located in Sistan plain. Soilelectrical conductivity was measured on soil samples taken from 122 sitesdistributed radiometry across to study area. The geostatistical methods ofordinary kriging and indicator kriging were used for salinity mapping. Thelatter was used to map the probability that soil salinity exceeds a criticalthreshold. The methods were evaluated using cross-validation. The validation ofused methods were evaluated using root mean square error (RMSE( and mean bias error (MBE).The results showed that both methods were similar for predict soil salinity.The probability maps of exceeding 2, 4 and 8 ds/m were generated usingindicator kriging. Given the critical threshold of 2 ds/m, almost all theregions have a probability of salinity of more than 0.5. The results showed that the salinity is moderate across the study area.Overall the obtained results indicated that unlike ordinary kriging, indicatorkriging is able to map the salinity risk. These maps are very helpful indecision such as land classification and management.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
49
60
https://jise.scu.ac.ir/article_10499_450ad6530a07fe8564d30a3dce87cc3b.pdf
Study of Compaction Effect on the Active Pores on Conductivity Water of the Loamy Soil Using Disk Infiltrometer
N.
Ramezani
MSc Student of Soil Science, Faculty of Agriculture, Shahid Chamran University
author
G.
Sayyad
Assistant Professor, Department of Soil Science, Faculty of Agriculture, Shahid Chamran University
author
A. R.
Barzegar
Professor, Department of Soil Science, Faculty of Agriculture, Shahid Chamran University
author
Y.
Mansuri
Assistant Professor, Department of Agriculture Mechinery Engineering, Faculty of Agriculture,Shahid Chamran University
author
text
article
2012
per
The major topic in the study of the compactionis the soil pore size and type. Soil compaction can be significantly reduced with changes in soil porevolume, water infiltration and availability of plants to air and water. Sumeffects of the above may lead to reduced soil quality.Therefore a field studywas performed to evaluate the effect of soilcompaction on movement of waterin the pores (coarseand medium size pores) of loamy soil. Acompletely randomized block was designed with three replications, applying blank(No teraffic passing), once, twice, three times, four times and eight times oftractor passings. Number of pores and percent flow through them with effectiveporosity and hydraulic conductivities (saturated and unsaturated), wasdetermined in the field using disc infilterometer in four potentials (0, -3, -5and -15 cm of water). Our results revealed thatin all of the treatments medium size poreswere many times of large ones hence,both sizes decreased with compaction. Results of disc Infilterometer showedthat coarse and medium size pores (macro and meso pores) of eight times tractorpassings relative to control decreased 85 and 62.5 percent respectively. The majoreffect of compactionwas onthelarge size pores. Themediumpore sizewasmoreimpressed thanlarge pore size. Numberof medium poresinthe soil wasless than large ones.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
61
70
https://jise.scu.ac.ir/article_10500_701bb30cae70d1ad94b4b5860c6f293d.pdf
Trend Analysis of Streamflows in East Azarbayjan Province
M.
Ghezel saflo
M.sc. Student, Department of Water Engineering, University of Tabriz, Tabriz, Iran
author
Y.
Dinpashoh
Associate Professor, Department of Water Engineering, University of Tabriz, Tabriz, Iran
author
M.A.
Ghorbani
Associate Professor, Department of Water Engineering, University of Tabriz, Tabriz, Iran
author
A.
Fakheri-Fard
Professor, Department of Water Engineering, University of Tabriz, Tabriz, Iran
author
text
article
2012
per
The aim of this study is trend analysis of streamflows of eastAzarbayejan in three time scales, which are monthly, seasonal and annual usingthe non-parametric methods. For this purpose the information of discharges often hydrometric stations (1983 -2008) were used. The Mann-Kendal test was usedafter removing the all significant autocorrelation effects from the data. Inorder to estimate the slope of trend line the Sen,s estimator methodwas used.Results showed thatabout 30% of the stations showed statistically significant negative trends inannual time scale. The strongest negative trend line slope belonged to theVanyar station having the slope of 0.35 (m3/s/year) in annual timescale. In seasonal time scale, negative trends observed at almost all thestations. In monthly time scale streamflow trends were negative for most of thestations and none of the stations experienced positive significant trends (evenat 10% level). The strongest negative trend observed in Tazekand (Soofi-Chay),which was significant at 10% level.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
71
82
https://jise.scu.ac.ir/article_10501_1d1077f30ba6d68a3c4631722dbdf982.pdf
The Evaluation of the Cprecip’s Parameter Ability on Appropriation of Snow’s Effect in River Daily Discharge Prediction by Neural Network and Fuzzy Neural Network
S.M.
Seyyed Abbasi
Graduate Student of Electrical Control, Ferdowsi University of Mashhad
author
M.
Goran Orimi
MS in Civil Hydraulic Structures, Ferdowsi University of Mashhad
author
A.
Farid Hosseini
Assistant Professor, Department of Water Engineering, Ferdowsi University of Mashhad
author
M.B.
Sharifi
Assistant Professor, Department of Civil Engineering, Ferdowsi University of Mashhad
author
text
article
2012
per
One of the most effective parameters in discharge prediction especially in snowy basins, is the snow parameter. Snow water equivalent (SWE) is the most common parameter used in modeling river flow to take the effect of the snow on the model into account. In this research, according to unavailability of the SWE parameter in most of the basins, we tried to offer Cprecip and MAZ-Cprecip instead of SWE. Cprecip is cumulative precipitation from November 1st to April 1st indicating the snowpack amount melting in the spring. MAZ-Cprecip is received by giving some changes on the Cprecip (to be suitable with Mazandaran basins). The results showed that the Cprecip parameter can be replaced with SWE and that MAZ-Cprecip parameter is more efficient than Cprecip parameter in Mazandaran basins, due to its most conformity with the basins in this region.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
83
92
https://jise.scu.ac.ir/article_10502_03c9c93afa42aca15fc940baea445713.pdf
Analysis of Ferquency Maximum Flood in Mountain basin (Case study : Armand station)
D.
Rahimi
Assistant professor Department of Physical Geographical University of Isfahan
author
A.
Baratian
Institute of Geographical Sciences
author
text
article
2012
per
A bivariate extreme value distribution, namely the Gumbel mixed model constructed from Gumbel marginal distributions is employed to analyze the joint distribution of correlated flood peak (probable maximum flood) and amount. Based on its marginal distributions, the joint distribution, the conditional probability distribution, and the associated return periods can be deduced. Parameters of the bivariate distribution model are estimated based on its marginal distributions by the method of moments (MM). The usefulness of the model is demonstrated by using it to represent multivariate probable maximum flood events at the Beheshtabad basin discharge station Armand in Iran.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
93
100
https://jise.scu.ac.ir/article_10503_fc28b705bc3e207c8fc62e6da614182f.pdf
Experimental Investigation of Gravity Current Frontal Velocity on Rough Beds
M.
Kaheh
PhD Candidate of Water Structure, Shahid chamran University of Ahwaz
author
M.
Ghomeshi
Professor of Water Science Faculty, ShahidChamran University, Ahwaz.
author
S. H.
Mousavi Jahromi
Associate Professor of Water Science Faculty, ShahidChamran University, Ahwaz
author
text
article
2012
per
The frontal of gravity current is most important section of theseflowtypes. The advance force in front is pressure gradient due to densitydifferences betweenfront flow andambient fluid. In order to find the roughness effects as a resistor on frontalvelocity, a series experiment of saline gravity currents were performed onrough beds with size of 0, 4, 7.5, 12 and 15 (mm). The saline gravity currentwith three inflow discharges of 0.7, 1 and 1.3 (lit/s) and three concentrationsof 10, 16, 20 (g/lit)was flowed on slope beds from 0.05 to 2.2 steeppercentage. For estimation of frontal velocity and assessing effects ofparameters, a linear model by correlation coefficient of 0.9 and RMSE of 0.037and mean ratio deficit of less than 10% was derived. By applying of linearmodeling and linear standardization data, the efficiency index of slop,relative roughness and non-dimensional discharge (Richardson number) onprediction of non-dimension frontal velocity was estimated as 0.17,-0.50 and -0.35.
Irrigation Sciences and Engineering
Shahid Chamran University of Ahvaz
2588-5952
35
v.
1
no.
2012
101
109
https://jise.scu.ac.ir/article_10504_891069d977fae21977b506f989336a6e.pdf