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 27 (2013)
Volume 26 (2012)
Volume 25 (2011)
Volume 24 (2010)
Volume 23 (2009)
Volume 22 (2008)
Research Article
Analysis and Development in Method of Permissible Working Hours of Agricultural Wells in the Khorasan-e-Razavi Province- Case study: Neyshabour Plain

S.A. Haghayeghi; A. Alizadeh

Volume 28, Issue 4 , September and October 2013, Pages 649-660


  Permissible working hours of agricultural wells in the Neyshabour plain was determined equal 4120 hours by regional water authority of Khorasan-e-Razavi. This research was conducted to introduce method of working hours of agricultural wells in the Khorasan-e-Razavi province (case study of Neyshabour ...  Read More

Research Article
Investigation of The Effect Hydraulic and Atmospheric Factors on the Evaporation and Wind Draft Losses in The Fixed Head Sprinkle Irrigation System

B. Rostamian; E. Maroufpoor; N. Azarboo; F. Farzankia

Volume 28, Issue 4 , September and October 2013, Pages 661-669


  Correct understanding of the factors affecting the rate of evaporation l and wind draft losses on sprinkler irrigation systems is important in order to provide guidelines for the development and utilization of water resources. This study was performed to identify the factors affecting the rate of evaporation ...  Read More

Research Article
Determination of (Mentha pipertia L.) Water Requirement, Single and Dual Crop Coefficients

H. Ghamarnia; F. Mousabeygi

Volume 28, Issue 4 , September and October 2013, Pages 670-678


  For optimal use of water resources determination of crop coefficients and water requirement for each region is necessary.The present study was conducted to determine the values of water requirement and crop coefficients of Peppermint (Mentha piperita L.) in a semi arid climate. For this purpose, eight ...  Read More

Research Article
Investigating the Factors Affecting theZahedan’s Aquifer Hydrogeochemistry Using Foctor Analysis, Saturation Indices and Composite Diagrams’ Methods

J. Dowlati; Gh. Lashkaripour; N. Hafezi Moghadas

Volume 28, Issue 4 , September and October 2013, Pages 679-694


  Zahedan aquifer is located in the northernof Zahedanwatedshed. It is essential to evaluate the quality of groundwater resources due to proving some part of drinking water, agricultural and industrial waters of this city. In order to carry out ground water quality monitoring, and assess the controlling ...  Read More

Research Article
Experimental and Field Investigation of the Use of Radial Gates as Flow Measurement Structures at Free and Submerged Flow Conditions

Y. Aminpour; M. Yasi; J. Farhoudi; H. Khalili Shayan

Volume 28, Issue 4 , September and October 2013, Pages 695-707


  The development of an enhanced approach for the use of radial gates as flow measurement structures is important in irrigation networks. In this study, new theoretical relationships were developed to estimate the discharge coefficient (Cd) for a single radial gate with three different sills, at free and ...  Read More

Research Article
Investigating the Precision of Hydraulic Conductivity and Sorptive Number Estimation in Cased Boreholes by Reynolds Analysis: The Cased of Pakdasht Region

T. Asadollahzadeh; M. Mashal; S. Karimzadgan

Volume 28, Issue 4 , September and October 2013, Pages 708-716


  Saturated hydraulic conductivity (Kfs) and sorptive number are the most important hydraulic characteristics effective on soil process. Cased boreholes falling-head permeameter (Philip method) is the one of hydraulic conductivity measurement borehole method. The analysis borehole cased falling-head in ...  Read More

Research Article
Merus Ring, a New Approach for Reducing Sediment in Drip Irrigation System

Kh. Barati; B. Mostafazadeh-Fard; A. A. Sheikhbahaei

Volume 28, Issue 4 , September and October 2013, Pages 717-728


  The main problem with trickle irrigation is the emitter’s clogging. Using Merus ring is a new method for reducing sedimentation. The effect of Merus ring is based on molecular oscillations of salts in water and the performance of this device is not based on magnetic field. This study was performed ...  Read More

Research Article
Flood Hazard Zonation by Combining Mod-Clark and HEC-RAS Models in Bustan Dam Basin, Golestan Province

Z. Parisay; V. Sheikh; M. Ownegh; A. Bahremand

Volume 28, Issue 4 , September and October 2013, Pages 729-741


  Flood is one of the devastating phenomena which every year incurs casualties and property damages. Flood zonation is an efficient technique for flood management. The main goal of this research is flood hazard and risk zonation along a 21 km reach of the Gorganrud river in Bustan dam watershed considering ...  Read More

Research Article
Soil Organic Carbon Dynamics in Native Rangelands Exposed to Grazing and Ungrazing Management in Rangeland Ecosystems of Central Zagrous

M. Riahi Samani; F. Raiesi

Volume 28, Issue 4 , September and October 2013, Pages 742-753


  The study of soil C dynamics and factors controlling this important soil process in rangeland ecosystems may provide an insight into understanding and evaluating changes in the global C cycle. The primary objective of this study was to quantity the effects of pasture management (i.e., grazing, controlled ...  Read More

Research Article
Spatial Distribution of Cadmium in Paddy Soils Southwest of Isfahan Using Geostatistics and GIS

Gh. Rahimi; A. A. Charkhabi

Volume 28, Issue 4 , September and October 2013, Pages 754-765


  The paddy soils in Lenjan area exposed to pollution owing to uncontrolled discharge of sewage sludge, wastewater and unessential fertilizers. Little information exists on Cadmium (Cd) distribution in paddy soils of Isfahan Province, this study was therefore investigated the spatial variability of cadmium ...  Read More

Research Article
Availability and Release Kinetics of Nonexchangeable Potassium in Some Calcareous Soils of Fars Province

S. Abdi; reza ghasemi; N.A. Karimian; M. Feizian

Volume 28, Issue 4 , September and October 2013, Pages 766-777


  Sum of exchangeable and solution forms of soil potassium is widely used to determine potassium availability for plants. Reliability of these methods is not enough in soils that contain 2:1 phyllosilicates. Additional to exchangeable potassium, nonexchamgeable potassium also has an important role in plant ...  Read More

Research Article
Impact of Traditional Livestock Husbandry on Forest Soil Physical, Chemical and Biological Characteristics (A Case Study: Parchinak Forest – Sari)

M. Hojjati; M. Asadiyan

Volume 28, Issue 4 , September and October 2013, Pages 778-786


  The presence of livestock within forest stands in north of Iran, as one of the main hindrances for optimal forest managing influence the productivity of that individual forest ecosystem in a waste area. The present study was conducted to investigate the effects of the long lasting presence of cattle ...  Read More

Research Article
Efficiencies of MUSLE-S, MUSLT, USLE-M and AOF Models for Storm-wise Sediment Yield Estimation in Standard Plats (Case Study: Sefiddasht Research Site of Semnan)

M. Kargar; Mohammad Reza Javadi; S.A.A. Hashemi

Volume 28, Issue 4 , September and October 2013, Pages 787-794


  Soil erosion and sediment production are among most important problems in developing countries including Iran. In this study it has been endeavored that applicability of four (AOF, MUSLE-S, MUSLT and USLE-M) models is investigated in Srfiddasht Research Site, Semnan province, at event scale to estimate ...  Read More

Research Article
Effect of Arbuscular Mycorrhizal Fungi and Organic Fertilizers Application on Yield Components of Two Wheat Cultivars

Ahmad Gholamalizadeh Ahangar; B. Kermanizadeh; S.K. Sabbagh; A. Sirousmehr

Volume 28, Issue 4 , September and October 2013, Pages 795-803


  This investigation was conducted in order to evaluate the direct effects of organic and bio - fertilizers on yield components of two native wheat cultivars, Bolani and cross - Bolani. The experiment conducted as a factorial in a completely randomized design with three replications. Treatment includes ...  Read More

Research Article
Determination of Soil and Plant Water Balance and Its Critical Stages for Rainfed Wheat Using Crop Water Stress Index (CWSI)

V. Feiziasl; A. Fotovat; A. Astaraei; A. Lakzian; M.A. Mousavi Shalmani

Volume 28, Issue 4 , September and October 2013, Pages 804-817


  In order to determination of water stress threshold and dryland wheat genotypes water status in different nitrogen managements, this experiment was carried out in split split plot RCBD design in three replications in 2010-2011 cropping year. Treatments included: N application time (whole fertilization ...  Read More

Research Article
Performance of Cationic Surfactant Modified Sepiolite and Bentonite in Lead Sorption from Aqueous Solutions

H.R. Rafiei; M. Shirvani; T. Behzad

Volume 28, Issue 4 , September and October 2013, Pages 818-835


  The remediation of soils and water contaminated with heavy metals generate a great need to develop efficient adsorbents for these pollutants. This study reports the sorption of lead (Pb) by bentonite (Bent), and sepiolite (Sep), that were modified with cetyltrimethyl ammonium (CTMA+) organic cations. ...  Read More

Research Article
Performance Evaluation of Statistical Downscaling Model (SDSM) in Forecasting Precipitation in two Arid and Hyper arid Regions

M. Rezaei; M. Nohtani; A. Moghaddamnia; A. Abkar; M. Rezaei

Volume 28, Issue 4 , September and October 2013, Pages 836-845


  One of the most important problems in the management and planning of water resources is to forecast long-term precipitation in arid region and hyper arid regions. In this study, statistical downscaling model (SDSM) is used for study of climate change effects on precipitation. The data used as input to ...  Read More

Research Article
Assessment of Fluctuation Patterns Similarity in Temperature and Vapor Pressure Using Discrete Wavelet Transform

A. Araghi; M. Mousavi Baygi; S.M. Hasheminia

Volume 28, Issue 4 , September and October 2013, Pages 846-854


  Period and trend are two main effective and important factors in hydro-climatological time series and because of this importance, different methods have been introduced and applied to study of them, until now. Most of these methods are statistical basis and they are classified in the non-parametric tests. ...  Read More

Research Article
Trend Analysis of Monthly and Annual Mean Temperature of the Northern Half of Iran Over the Last 50 Years

F. Ahmadi; F. Radmanesh

Volume 28, Issue 4 , September and October 2013, Pages 855-865


  The temperature is one of the essential elements in formation of climate and its changes can alter the climate of each region, Therefore study of temperature changes at different spatial and temporal scales is devoted a large part of research to climatology. The mean temperature changes of the northern ...  Read More