Volume 38 (2024)
Volume 37 (2023)
Volume 36 (2022)
Volume 35 (2021)
Volume 34 (2020)
Volume 33 (2019)
Volume 32 (2018)
Volume 31 (2017)
Volume 30 (2016)
Volume 29 (2015)
Volume 28 (2014)
Volume 27 (2013)
Volume 25 (2011)
Volume 24 (2010)
Volume 23 (2009)
Volume 22 (2008)
Research Article
Evaluation of Maize Root Morphology under Fertigation Method with Surface and Subsurface Drip Irrigation Systems

S. Esfandyari; hossein dehghani; A. Alizadeh; K. Davary

Volume 26, Issue 5 , November and December 2012, Pages 1064-1071


  The present study was aimed to determine the effect of drip irrigation methods and nitrogen levels and their interaction on corn root development and study of the root movement model. For this purpose, a split plot field experiment based on randomized complete block with irrigation method in two levels ...  Read More

Research Article
Reservoir Optimum Operation in sudden pollution condition using quality-Quantity Compromising Approach

S. Beygi; O. Bozorghaddad; M. Khayatkholghi

Volume 26, Issue 5 , November and December 2012, Pages 1072-1082


  In recent years, limitation of water resources and the increasing trend of population growth cause the quantity issues on water supply. On the other hand, permanent and sudden pollution of waters as a biological threat has always been of high importance, because occurrence of biological pollution in ...  Read More

Research Article
Investigation of Some Nutrients Concentration and Corn Yield with Application of Different Sewage Sludge Levels and Chemical Fertilizer in Three Textural Classes of a Calcareous Soil

H. R. Boostani; abdolmajid ronaghi

Volume 26, Issue 5 , November and December 2012, Pages 1092-1100


  Sewage sludge (SS) as a source of required plant nutrients has been utilized in many countries for crops production. for investigation of SS application affect in compared to chemical fertilizer treatment (F), on dry matter yield (DMY) and concentration of some macro and micro nutrient in corn, a greenhouse ...  Read More

Research Article
Results Comparison of Employing PSO, GA and SA Algorithms in Optimizing Reservoir Operation (Case Study: Shaharchai Dam, Urmia, Iran)

H. Rezaei; J. Behmanesh; S. Besharat

Volume 26, Issue 5 , November and December 2012, Pages 1101-1108


  With respect to necessity of the optimum use of water resources and existence of many various optimization methods, in this study 3 kinds of heuristic algorithms have been used including Particle Swarm Optimization, Genetic Algorithm and Simulated Annealing to optimize the operation of Shaharchai dam ...  Read More

Research Article
Water Delivery Optimization in BP14 Canal of Fumanat Irrigation Network Using Ants Colony System Algorithm

A. Emadi; S. Kakouie

Volume 26, Issue 5 , November and December 2012, Pages 1109-1118


  Poor delivery and distribution water in irrigation canals will cause the discontent of farmers, disrespect of equity in water delivery and increase operational losses. Therefore optimal water delivery scheduling will increase performance condition network, considerably. With the spread of computers and ...  Read More

Research Article
Investigation of the Effect of Irrigation Water Quality, Treated Wastewater and N. P. K Fertilizer Management in Broccoli Cultivation on Soil Chemical Properties

A. Atefi; ali asghar ghaemi

Volume 26, Issue 5 , November and December 2012, Pages 1119-1127


  The aim of the present research is to study the effect of both different irrigation water quality (treated wastewater and urban water) and N. P. K fertilizer via Tape subsurface micro irrigation on the soil chemical properties in the test area was investigated in Fras Bajgah Region in 2010. In this study, ...  Read More

Research Article
Cycles Analysis of Time Discharge and Rainfall Series of Mashinekhaneh Station (Garakanrood of Talesh Catchment)

H. Asakereh; R. Khoshraftar; F. Sotudeh

Volume 26, Issue 5 , November and December 2012, Pages 1128-1139


  Rainfall and debit of rivers are two tempo-spatial non-linear and changeable factors. One way to study and analysis these parameters is investigate appearance and latent oscillations. Spectral Analysis is a useful technique to reveal these oscillations in time series. In this paper it has been attempted ...  Read More

Research Article
Numeral Analysis of Soil Pollution Distribution of Heavy Metals in Anguran Area, Zanjan

S. Abdollahi; M. A. Delavar; P. Shekari

Volume 26, Issue 5 , November and December 2012, Pages 1140-1151


  Increasing soil pollution due to heavy metals is a major concern of present day soil research. This study conducted to know intensity and spatial pattern of soil heavy metals pollution in a 10,000 ha area of Anguran region near Zanjan. A number of 315 surface (0-10 cm) samples collected at nodes of a ...  Read More

Research Article
Comparing Wheat Evapotranspiration Estimated by Bowen Ratio Energy Balance (BREB) Method with Result of Lysimeter

M. Ghaemi Baygi; mahmood raeini; M. Mousavi Baygi

Volume 26, Issue 5 , November and December 2012, Pages 1152-1160


  Evapotranspiration is one of the important elements of the hydrologic cycle in agricultural projects. Energy balance (the bowen ratio) is a method for estimating evapotranspiration of plant which is based on measurements of temperature and humidity gradients in two different heights of a plant. An experiment ...  Read More

Research Article
Investigation of Seasonal and Spatial Variation of Hydrochemical Parameters in Karde River (North of Mashhad)

M. Heydarizad; Hossein Mohammadzadeh

Volume 26, Issue 5 , November and December 2012, Pages 1161-1170


  Abstract Karde river is one of the most important river in Khorasan Razavi province which provides potable water for 3 million inhabitant of Mashhad city. The following research shows seasonal and spatial fluctuation in water quality. Investigating the chemical analysis of Karde rivers water shows that ...  Read More

Research Article
Comparison of Fertigation with Surface Broadcast Fertilizer Method in Water, Fertilizer Use Efficiency, Yield, Compenent Yield of Corn and Losses of Nitrogen

A. Mohseni; H. Mirseyed Hosseini; F. Abbasi

Volume 26, Issue 5 , November and December 2012, Pages 1181-1189


  Fertilizing method plays an important role in fertilizer and water use efficiency and plant yield and losses fertilizer. A field experiment was carried out at 16 treatments with factorial a complete randomized block design during 2010 for free drainage furrows. First factor was four levels of water (60, ...  Read More

Research Article
The Interaction of N Sources and Drought Stress at Flowering Stage of Maize on N and P Uptake and Efficiency

S. Fallah; Fayez Raiesi

Volume 26, Issue 5 , November and December 2012, Pages 1190-1199


  The effects of organic and inorganic N sources on nutrient (N and P) efficiency under the water-stressed conditions have not yet been determined. Thus, a field study was conducted to determine the influence of N from different sources along with drought stress on nutrient efficiencies of maize. Main ...  Read More

Research Article
Study of River Flow Effects on Subsurface Water Diversion Using Porous Media in Seasonal Rivers

R. Mansouri; K. Esmaili; A.N. Ziaei; Hossein Ansari; S. R. Khodashenas

Volume 26, Issue 5 , November and December 2012, Pages 1200-1214


  In arid and semi-arid regions, collection of surface and subsurface waters in small seasonal rivers is very crucial, particularly in dry seasons. The cost of construction and maintenance of classical water intakes makes them inappropriate for these rivers. In this study a rather new method to divert ...  Read More

Research Article
Modeling the Effect of Hill Slope Length on Features of Rill Erosion Based on Incomplete Gamma Function in Ahmad-Abad, Mashhad

S. M. Hosseni; A. Mosaedi; K. Naseri; A. Golkarian

Volume 26, Issue 5 , November and December 2012, Pages 1215-1225


  Rill erosion due to run off on hill slopes is a kind of water erosion which causes the highest soil loss in world-wide scale. Since the length of hill slope is one of the most effective factors in erosion, in this research, the variation of width, depth, cross-section, and frequency of rills were evaluated ...  Read More

Research Article
Effects of Nitrification Inhibitor 3,4-Dimethylpyrazole Phosphate on the Nitrogen Uptake, Yield Components and Yield of Wheat in Greenhouse Conditions

Sh. Kiani

Volume 26, Issue 5 , November and December 2012, Pages 1226-1235


  A pot experiment was conducted to elucidate the effects of nitrification inhibitor (NI) 3, 4-dimethylpyrazole phosphate (DMPP) on the nitrogen uptake, yield components, yield and grain protein content of spring wheat (Triticum aestivum L.) cv. Bahar during 2011 at ShahreKord University. A factorial experiment ...  Read More

Research Article
Hydraulic Jump Characteristics at an Abrupt Drop under Influence of Artificial Roughness

M. J. Nasr Esfahani; M. Shafai Bajestan

Volume 26, Issue 5 , November and December 2012, Pages 1236-1246


  Abrupt drop is a sudden lowering of the channel bed which is done for reduction of hydraulic jump length and to ensure that the jump will not be shifted outside the basin for various flow conditions. This type of basin is used in irrigation and drainage networks as an effective measure for dissipation ...  Read More

Research Article
Effect of Scale and Type of Classification System on the Results of Soil Mapping Using Geopedologic Approach (A Case Study: Damavand Region, Tehran Province)

Z. Rashidi Koochi; I. Esfandiarpoor Borujeni; A. Abbaspour; A. Kamali; A.A. Naderi

Volume 26, Issue 5 , November and December 2012, Pages 1247-1256


  Geopedology is a systematic approach to analyze the geomorphic levels for soil mappingwhich organizes natural terrains in a hierarchical order in accordance with their scale. Hereon, the effect of mapping scale and kinds of soil classification system on the reliability of the geopedologic approach was ...  Read More

Research Article
Evaluation of Subsurface Drainage Performance by Using SWAP Model (Case Study Behshahr Ran Drainage System)

V. R. Verdinejad; H. Ebrahimiam; H. Ahmadi

Volume 26, Issue 5 , November and December 2012, Pages 1257-1267


  A transient drainage simulation model, SWAP, was used to evaluate the performance of subsurface drainage system. SWAP model was calibrated by measured daily data including water table depth, drain discharge rate and soil and water drain salinity collected from Behshahr Ran drainage system for 120 days ...  Read More

Research Article
Regionalization of Urmia Lake Basin from the View of Drought Using Factor Analysis

M. Ghorbani Aghdam; yaghoub dinpazhoh; A. Fakheri Fard; S. Darbandi

Volume 26, Issue 5 , November and December 2012, Pages 1268-1276


  Having a correct view of the effective factors on climatic changes by explanation of a considerable part of the total variance in data with limited number of principal components the analytical methods of decreasing data dimensions, such as PCA are important tools in water resources planning. In this ...  Read More

Research Article
Comparison of Optimized Some Water Use Efficiency in Paddy Fields of Rasht

M. Aghajani; Maryam Navabian

Volume 26, Issue 5 , November and December 2012, Pages 1277-1288


  Water for rice cultivation is one of the main inputs. The new administration of irrigated rice is increase water efficiency and water conservation in the paddy fields. In this research, for optimization of intermittent irrigation management in proportion to water requirement of different stages of rice ...  Read More

Research Article
Investigating and Developing Transmission Losses Models for Selected Rivers of Razavi Khorasan Province

R. Ghafourian; A. Bagherian kalat; A. Gord Noushahri

Volume 26, Issue 5 , November and December 2012, Pages 1289-1298


  Part of water flowing downstream in rivers, infiltrates into the bed river. Infiltrated water depends on morphologic and hydraulic characteristic of the rivers. Planners and managers want to know the amount of water infiltrates into the bed and consequently recharges ground water. In this study three ...  Read More

Research Article
Forecasting River flow By Bilinear Nonlinear Time Series Model (Case Study : Barandoz-Chay & Shahar-Chai Rivers)

H. Naveh; K. Khalili; M. T. Alami; J. Behmanesh

Volume 26, Issue 5 , November and December 2012, Pages 1299-1307


  One of the important tools in modeling and forecasting of hydrological processes, is using and analysis of time series. The generated river flow series by using time series models have been used in many researches such as drought, flood periods, reservoir systems design and other purposes. The use of ...  Read More

Research Article
Investigation of Effective Parameters on Manning Coefficient in Rivers and Obtain the New Relation for Estimate it (Case Study: Ferizi River)

A.A. Abbasi; M. Malek Nejad Yazdi

Volume 26, Issue 5 , November and December 2012, Pages 1308-1317


  In river engineering, determination of flow resistance is essential. Various empirical methods have been suggested for estimating bed roughness coefficient by researchers. However, these methods can only be applied to Special River. In this study, flow conditions and river geometry data were obtained ...  Read More