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 26 (2012)
Volume 25 (2011)
Volume 24 (2010)
Volume 23 (2009)
Volume 22 (2008)
Research Article
Damage Tolerance Analysis of Water Distribution Networks with Different Orders of Failure

A.R. Gheisi; A.N. Ziaei; Saeed Reza Khodshenas

Volume 27, Issue 4 , September and October 2013, Pages 669-679


  Damage or failure is an inevitable event which should be considered in all decisions taken at planning-, design-, operation- and maintenance-level for a water distribution network (WDN). So far several studies are conducted about reliability analysis in literature, but very little attention is paid to ...  Read More

Research Article
Development of Optimization Model for Water Allocation in Agriculture, Industry and Service sectors By Using Advanced Algorithm, GAPSO

M. Habibi Davijani; M.E. Banihabib; S.R. Hashemi

Volume 27, Issue 4 , September and October 2013, Pages 680-691


  Population growth has caused increase of water demand for the drinking water, industry and agriculture. This condition needs the application of effective measures for optimal water management. So, in this research, a water allocation model is proposed for agriculture, industry and service sectors. In ...  Read More

Research Article
Simulation of Water Movement and Moisture Redistribution under Drip Irrigation Systems Using Hydrus 2D/3D

M. Khorami; A. Alizadeh; H. Ansari

Volume 27, Issue 4 , September and October 2013, Pages 692-702


  Increased use of drip irrigation systems in the country and farmer's tendency to use more efficient irrigation systems, has caused need to know about parameters and factors that affect irrigation efficiency. This Study was done to examine how water moves in the soil and soil moisturere distribution at ...  Read More

Research Article
Effect of Slope and Vegetation on Carbon Sequestration in a Semi-dry Rangeland of Western Iran, Case Study: Khanghah Sorkh, Urmia

R. Erfanzadeh; J. Motamedi

Volume 27, Issue 4 , September and October 2013, Pages 703-711


  In this study, Khanghag Sorkh watershed was selected to study on the effect of vegetation and slope changes on soil carbon sequestration. Therefore, three vegetation communities were recognized and soil sampling was done within 0-30 cm depth in two slopes (10-30% and 30-50%). Soil samples were analyzed ...  Read More

Research Article
The Prediction Possibility of Soil Cation Exchange Capacity by Using of Easily Accessible Soil Parameters

A. Hezarjaribi; F. Nosrati Karizak; K. Abdollahnezhad

Volume 27, Issue 4 , September and October 2013, Pages 712-719


  Cation Exchange Capacity (CEC) is an important characteristic of soil in view point of nutrient and water holding capacity and contamination management. Measurement of CEC is difficult and time-consuming. Therefore, CEC estimation through other easily-measurable properties is desirable. The purpose ...  Read More

Research Article
Effect of Humic Acid on Adsorption Behavior of Phosphorus in a Calcareous Soil

R. Zebardast; E. Sepehr

Volume 27, Issue 4 , September and October 2013, Pages 720-731


  In order to investigate the effect of humic acid (HS) on P adsorption behavior, an experiment carried out with three levels of HS (0, 100, 200 mg/L) and various P concentration (0 to 30 mg/L) at two ionic strengths (IS) of 0.1 and 0.01 M. Adsorption data were fitted to Langmuir, Freundlich and Temkin ...  Read More

Research Article
Effect of BaCl2 on the Release and Kinetics of Potassium in the Selected Silicate K-bearing Minerals

Hadis Hatami; Ali reza Karimi; A. Fotovat; H. Khademi

Volume 27, Issue 4 , September and October 2013, Pages 732-741


  Aluminosilicates such as K-feldspar and micaceous minerals are the main source of potassium in soils. The objectives of this study were to investigate the release of K from micaceous minerals (biotite, phlogopite, muscovite) and K-feldspars (Zanjan and Yazd) using sequential extraction by 0.05 M BaCl2 ...  Read More

Research Article
Assessment of Several Extractants for the Determination of Zinc Bioavailability to Bean (Phaseolus vulgaris L.) in Calcareous Soils Amended and Unamended with Sewage Sludge

H.R. Motaghian; A. Hosseinpour

Volume 27, Issue 4 , September and October 2013, Pages 742-752


  Sewage sludge uses as a low coast fertilizer to rectify deficit of elements such as zinc (Zn). A suitable extractant for estimation of bean-available Zn in calcareous soils amended with sewage sludge has not yet been introduced. The aim of this research was to assess several chemical extractants for ...  Read More

Research Article
Evaluation of Drought Using the Temperature Vegetation Dryness Index (TVDI) and the Modified Temperature Vegetation Dryness Index (MTVDI) and MODIS Satellite Images

S. Noori; S.H. Sanaei Nejad

Volume 27, Issue 4 , September and October 2013, Pages 753-762


  Because most of the methods that have been proposed for estimating statues drought generate point estimate, so researchers were always looking for ways to achieve regional estimates for better manage this gradually creeping phenomenon. Recently, remote sensing and techniques proposed base on it could ...  Read More

Research Article
Effect of Irrigation Water Salinity with Constant Turbidity on Soil Moisture Characteristic Curve

I. Nikravesh; Hadi Moazed; S. Broomandnasab; AbdAli Naseri

Volume 27, Issue 4 , September and October 2013, Pages 763-768


  Many of irrigated agriculture problems are resulting from chemical and physical composition of irrigation water. The irrigation water quality is effective on soil moisture characteristic curve by effect on soil structure, pore size distribution and continuity of them. The aim of this study was to evaluate ...  Read More

Research Article
Estimating Hydraulic Performance of Pressurized Irrigation System Using Artificial Neural Networks and Nonparametric Regression

B. Ababaei; V. R. Verdinejad

Volume 27, Issue 4 , September and October 2013, Pages 769-779


  In this research, replacement of hydraulic models with statistical models and artificial neural networks were studied in order to estimate the criteria of pressurized irrigation systems hydraulic performance. The Coefficient of Uniformity of Christiansen (CU) was accepted as a hydraulic performance index. ...  Read More

Research Article
The Rhizospheric Effects of Wheat (Triticum aestivum L.) on Phosphorus Release Kinetics

T. Raiesi; A. Hosseinpur

Volume 27, Issue 4 , September and October 2013, Pages 780-791


  The objective of this research was to evaluate the rhizospheric effects of wheat on phosphorus (P) release kinetics in 10 calcareous soils under rhizobox conditions. The kinetics of P release in the bulk and the rhizosphere soils were determined by successive extraction with 0.5 M NaHCO3 in a period ...  Read More

Research Article
Effect of Polyvinyl Acetate on Hydraulic Conductivity, Runoff and Sediment Production in a Marl Soil

S. Hamidi Nehrani; A.R. Vaezi

Volume 27, Issue 4 , September and October 2013, Pages 792-801


  Marls have been recognized as susceptible formations against water erosion. Polyvinyl acetate (PVAc) is a biodegradable polymer which can be currently applied in soil conservation programs. The study was conducted to investigate effect of the PVAc on hydraulic conductivity and runoff and sediment production ...  Read More

Research Article
Hydraulic Simulation the Improving Methods Using the Mathematical Model Hec-Ras4 (Case Study: Karun River)

N. Azam; M. Ghomeshi; Zh. Fayezizade; M. Mansouri Hafshejani

Volume 27, Issue 4 , September and October 2013, Pages 802-811


  The operation dredging of river bed and also creating a cut off for removing sharp meander and maintain proper alignment is effective non-structural methods for decreasing the flood level. This study compared the effects of 1) Dredging karoon river at ahvaz range, 2) Removing heterogeneity height in ...  Read More

Research Article
Zoning the Groundwater Chemical Quality Attributes of Fasa Plain Using Geostatistical Approaches

M. Zahedifar; S.A.A. Moosavi; M. Rajabi

Volume 27, Issue 4 , September and October 2013, Pages 812-822


  Management and chemical quality of groundwater is very important in arid regions. Fasa plain (in Fars province) is an arid-semi arid region in Iran, that almost all of its residents are using groundwater in agricultural activities. Recent water shortages resulted in deepens water table, salinization ...  Read More

Research Article
Effect of Scale on NaCl Dispersivity by HYDRUS 2D

M. Farasati; S.M. Seyedian

Volume 27, Issue 4 , September and October 2013, Pages 823-831


  Dispersivity is an important property of a porous medium and Advection-Dispersion equation (ADE). It is used in solving problems related to pollutants migration by groundwater. Numerical models are frequently used for simulation of water movement in soils. In the present study, the dependence of NaCl ...  Read More

Research Article
Experimental Study on the Effects of Artificial Bed Roughness on Instantaneous Velocity Fluctuations of Saline Density Currents

P. Varjavand; A. Hosseinzadeh Dalir; M. Ghomeshi; Davoud Farsadi

Volume 27, Issue 4 , September and October 2013, Pages 839-849


  Instantaneous velocity fluctuations are very important insuspended sediment load transportation. In this study experiments were performed toinvestigate the effects of artificial bed roughness on the instantaneous velocity fluctuations of saline density currents. Conic and cylindrical shapes of roughness ...  Read More

Research Article
Performance of some Different Methods of Computing Hurst Exponent for Climatological Time Series

B. Ghahraman

Volume 27, Issue 4 , September and October 2013, Pages 850-859


  Fractional Gaussian noise (fGn) is an important and widely used self-similar process, which is mainly parametrized by its Hurst exponent (H) to specify its long-term persistence (LTP). Many researchers have proposed methods for estimating the Hurst exponent of fGn. But there is only a few researches ...  Read More