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 26 (2012)
Volume 25 (2011)
Volume 24 (2010)
Volume 23 (2009)
Volume 22 (2008)
Computation of Evaporation (Stages 1 and 2) from a Bare Saline Soil

mahdi selahvarzi; B. Ghahraman; H. Ansari; K. Davari

Volume 32, Issue 2 , May and June 2018, , Pages 229-237

https://doi.org/10.22067/jsw.v32i2.31830

Abstract
  Introduction: Evaporation takes place from vegetation cover, from bare soil, or water bodies. In the absence of a vegetation cover, soil surface is exposed to atmosphere which increases the rate of evaporation. Evaporation of soil moisture will not only lead to water losses but also increase the risk ...  Read More

Effect of Geological Feature on Regional Flood Frequency of Watersheds of North-East of Iran

tayebe taherpour; bijan Ghahraman2; kamran davary

Volume 31, Issue 6 , January and February 2018, , Pages 1526-1537

https://doi.org/10.22067/jsw.v31i6.28972

Abstract
  Introduction: Finding out homogeneous watersheds based on their flood potential mechanisms, is needed for conducting regional flood frequency analysis. Similarity of watersheds based on flood potential severity depends on many factors such as physiographic and meteorological features of the watershed, ...  Read More

Identification of Homogeneous Stations for Quality Monitoring Network of Mashhad Aquifer Based on Nitrate Pollution

Moslem Akbarzadeh; Bijan Ghahraman; Kamran Davary

Volume 30, Issue 5 , November and December 2016, , Pages 1382-1393

https://doi.org/10.22067/jsw.v0i0.44678

Abstract
  Introduction: For water resources monitoring, Evaluation of groundwater quality obtained via detailed analysis of pollution data. The most fundamental analysis is to identify the exact measurement of dangerous zones and homogenous station identification in terms of pollution. In case of quality evaluation, ...  Read More

Evaluation of the Performance of ClimGen and LARS-WG models in generating rainfall and temperature time series in rainfed research station of Sisab, Northern Khorasan

najmeh khalili; Kamran Davary; Amin Alizadeh; Hossein Ansari; Hojat Rezaee Pazhand; Mohammad Kafi; Bijan Ghahraman

Volume 30, Issue 1 , March and April 2016, , Pages 322-333

https://doi.org/10.22067/jsw.v30i1.45058

Abstract
  Introduction:Many existing results on water and agriculture researches require long-term statistical climate data, while practically; the available collected data in synoptic stations are quite short. Therefore, the required daily climate data should be generated based on the limited available data. ...  Read More

Development and application of the Qausi Distributed Water Balance model (QDWB) in the Neishaboor-Rokh watershed

sajjad razavi; kamran davary; Bijan Ghahraman; Ali Naghi Ziaei; azizallah izady; kazem esahgian; mehri shahedy; fatemeh taleby

Volume 30, Issue 6 , January and February 2016, , Pages 1888-1904

https://doi.org/10.22067/jsw.v30i6.47416

Abstract
  Limitation of water resources in Iran motivates sustaining and preserving of the resources in order to supply future water needs. Fulfilling these objectives will not be possible unless having accurate water balance of watersheds. The purpose of this study is to estimate the water balance parameters ...  Read More

Uncertainty Analysis in Prediction of Soil Water Balance Components in two Irrigated Field in Arid Region

M. Shafiei; B. Ghahraman; B. Saghafian; K. Davary; M. Vazifedust

Volume 28, Issue 5 , November and December 2015, , Pages 909-917

https://doi.org/10.22067/jsw.v0i0.29617

Abstract
  Uncertainty analysis is a useful tool to evaluate soil water simulations in order to get more information about the models output. These information provide more confidence for decision making processes. In this study, SWAP model is applied for soil water balance simulations in two fields which are planted ...  Read More

Simulation of Rainfed Wheat Yield using AquaCrop Model, Case Study: Sisab Rainfed Researches Station, Northern Khorasan

N. Khalili; K. Davary; A. Alizadeh; M. Kafi; H. Ansari

Volume 28, Issue 5 , November and December 2015, , Pages 939-9030

https://doi.org/10.22067/jsw.v0i0.34927

Abstract
  Modeling of crop growth plays an important role in evaluation of drought impacts on rainfed yield, choosing an optimum sowing date, and managerial decision-makings. Aquacrop model is a new crop model that developed by Food and Agriculture Organization (FAO), that is a model for simulation of crop yield ...  Read More

Estimating Soil Water Retention Curve Using The Particle Size Distribution Based on Fractal Approach

M.M. Chari; B. Ghahraman; K. Davary; A. A. Khoshnood Yazdi

Volume 29, Issue 3 , July and August 2015, , Pages 604-614

https://doi.org/10.22067/jsw.v0i0.34661

Abstract
  Introduction: Water and soil retention curve is one of the most important properties of porous media to obtain in a laboratory retention curve and time associated with errors. For this reason, researchers have proposed techniques that help them to more easily acquired characteristic curve. One of these ...  Read More

Validation of AquaCrop Model for Simulation of Winter Wheat Yield and Water Use Efficiency under Simultaneous Salinity and Water Stress

M. Mohammadi; B. Ghahraman; K. Davary; H. Ansari; A. Shahidi

Volume 29, Issue 1 , March and April 2015, , Pages 67-84

https://doi.org/10.22067/jsw.v0i0.31304

Abstract
  Introduction: FAO AquaCrop model (Raes et al., 2009a; Steduto et al., 2009) is a user-friendly and practitioner oriented type of model, because it maintains an optimal balance between accuracy, robustness, and simplicity; and it requires a relatively small number of model input parameters. The FAO AquaCrop ...  Read More

Soil Moisture Estimation Using MODIS Images (Case Study: Mashhad Plain Area)

M. Fashaee; Seied Hosein Sanaei-Nejad; K. Davary

Volume 29, Issue 6 , January and February 2015, , Pages 1735-1748

https://doi.org/10.22067/jsw.v29i6.34978

Abstract
  Introduction: Numerous studies have been undertaken based on satellite imagery in order to estimate soil moisture using vegetation indices such as NDVI. Previous studies suffer from a restriction; these indices are not able to estimate where the vegetative coverage is low or where no vegetation exists. ...  Read More

Adopting Hierarchial Cluster Analysis to Improve The Performance of K-mean Algorithm

B. Ghahraman; K. Davary

Volume 28, Issue 3 , July and August 2014, , Pages 471-480

https://doi.org/10.22067/jsw.v0i0.20583

Abstract
  Due to inadequate flood data it is not always possible to fit a frequency analysis to at-site stations. Reliable results are not always guaranteed by a single clustering algorithm, so a combination of methods may be used. In this research, we considered three clustering algorithms: single linkge, complete ...  Read More

Investigation of Suitable Regions Determination for Drought Monitoring Using TRMM Satellite Data (Case Study: Khorasan Razavi Province)

H. Ghafourian; Seied Hosein Sanaei-Nejad; K. Davary

Volume 28, Issue 3 , July and August 2014, , Pages 638-647

https://doi.org/10.22067/jsw.v0i0.27974

Abstract
  Most of drought evaluation systems are based on precipitation data. However short period of measured data and inappropriate distribution of weather stations and undesirable quality of precipitation measurement networks reduce ability of showing the spatial pattern of drought. Therefore, it is necessary ...  Read More

Estimating Reference Evapotranspiration by Using Principal Component Analysis (PCA) and The Development of a Regression Model (MLR-PCA) (Case Study: Mashhad Station)

nona sheikholeslami

Volume 28, Issue 2 , May and June 2014, , Pages 420-429

https://doi.org/10.22067/jsw.v0i0.25711

Abstract
  Evapotranspiration is one of the most important parameters that its understanding is necessary for estimating crop water requirement and design of irrigation systems. This phenomenon is greatly influenced by climatic parameters. In this study, the relative importance of variables affecting this phenomenon ...  Read More

Using the WEAP Model to Assess The Impact of Irrigation Water Use Management on Water Resources of Neyshabour Plane

S. Kermanshahi; K. Davari; majid hashemi nia; A. Farid Hosseini; H. Ansari

Volume 27, Issue 3 , July and August 2013, , Pages 495-505

https://doi.org/10.22067/jsw.v0i0.26041

Abstract
  The requiring of reducing agricultural water demand as the world’s largest consumer of water, for having sustainable water resources is not concealed to anyone. With measurements such as increasing irrigation efficiency, changing in cropping pattern, reducing the cultivation area, etc, this goal can ...  Read More

Approximate Solutions to Richards’ Equation for Soil Water Infiltration Using Scaling

M. Sadeghi; B. Ghahraman; A.N. Ziaei; K. Davary

Volume 27, Issue 3 , July and August 2013, , Pages 525-536

https://doi.org/10.22067/jsw.v0i0.26045

Abstract
  After introducing similar media theory, many scaling methods were developed and have been widely used to cope with soil variability problem as well as to achieve invariant solutions of Richards’ equation. Recently, a method was developed for scaling Richards’ equation (RE) for dissimilar soils such ...  Read More

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

https://doi.org/10.22067/jsw.v1391i0.16915

Abstract
  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

Study on The Yield Assesse Indexes and Determinate Optimum Depth Irrigation for Two Cultivars of Cotton on Different Level of Water Salinity

M.H. Najafi Mood; A. Alizadeh; K. Davari; M. Kafi; A. Shahidi

Volume 26, Issue 4 , September and October 2012, , Pages 990-998

https://doi.org/10.22067/jsw.v0i0.15303

Abstract
  This experiment was conducted based upon a factorial split plot design consisting of three factors: salinity with three levels (2.2, 5.5 and 8.3 dS/m), irrigation with four levels (50%, 75%, 100% and 125%), cultivars with two levels (Varamin and Khordad). There were three replicates for each treatment ...  Read More

Using Fractal Dimension of Particle Size in Estimating Saturated Hydraulic Conductivity

V. Yazdani; B. Ghahreman; K. Davari; M.E. Fazeli

Volume 26, Issue 3 , July and August 2012

https://doi.org/10.22067/jsw.v0i0.14929

Abstract
  One of the important aspects of soil is, knowing the relationships between spatial features of soil and quantity in statistical model. The goal of this research is to estimate saturated hydraulic conductivity by regression and Co-Active Neuro-Fuzzy Inference System (ANFIS) with using the parameters of ...  Read More

Estimation of the Daily Rainfall Amount in Province of Khorasan

E. Amini; B. Ghahraman; K. Davary; M. Mousavi Baygi

Volume 25, Issue 5 , November and December 2011

https://doi.org/10.22067/jsw.v0i--.11228

Abstract
  Abstract Agricultural scientists have developed considerable interest in modeling and generation of rainfall as new ways of analyzing rainfall data and assessing its impact on agriculture. A combination of Markov chain and gamma distribution function is recognized as a simple approach and is demonstrated ...  Read More

Prediction of Water Requirement of Sugar beet during 2011-2030 by Using Simulated Weather Data with LARS-WG Downscaling Model

B. Ashraf; M. Mousavi Baygi; Gh.A. Kamali; K. Davary

Volume 25, Issue 5 , November and December 2011

https://doi.org/10.22067/jsw.v0i--.11254

Abstract
  Abstract The most important part of the design and operation of the supplier systems of agricultural water requirement is the estimating of plant water requirement. In this study by using the LARS-WG5 model, downscaled the data of HADCM3 model according A1B, A2 and B1 scenarios that confirmed by IPCC, ...  Read More

Prediction of Seasonal Variations of Climatological Parameters over Next 20 Years by Using Statistical Downscaling Method of HADCM3 Data(Case Study: Khorasan Razavi Province)

B. Ashraf; M. Mousavi Baygi; G.A. Kamali; K. Davari

Volume 25, Issue 4 , September and October 2011

https://doi.org/10.22067/jsw.v0i0.10267

Abstract
  Abstract Due to low spatial resolution or simplifying of some micrometeorological phenomena, atmospheric general circulation models are not able to give a good estimation for weather conditions over study area. So their outputs should downscale into weather stations scales. In this research data of ...  Read More

Development of Some Pedotransfer Functions to Predict the Saturated Hydraulic Conductivity of Gravel Soils Using Partial Least Square Regression Method

S. Zarrinfar; B. Ghahraman; K. Davary

Volume 25, Issue 3 , July and August 2011

https://doi.org/10.22067/jsw.v0i0.9696

Abstract
  Abstract Saturated hydraulic conductivity (Ks) is one of the most important physical properties of soils which is expensive and time-consuming to directly measure. Hence, indirect methods, such as pedotransfer functions (PTFs), were developed to predict the Ks. Previous studies showed that most of the ...  Read More

Drought Monitoring with New Precipitation and Evapotranspiration Index Based on Fuzzy Logic

H. Ansari; K. Davary; S.H. Sanaei-Nejad

Volume 24, Issue 1 , March and April 2010

https://doi.org/10.22067/jsw.v0i0.2916

Abstract
  Abstract Drought is a natural creeping event that starts due to lower moisture compared to normal condition. This phenomenon impacts all aspects of human activities. However there is neither any detailed definition nor a general and proper index for drought monitoring. In this study, fuzzy logic has ...  Read More

The Management of Supplementary Irrigation for Rainfed Wheat During the Drought Periods Using Crop Moisture Index

N. Khalili; K. Davari; H. Ansari; A. Alizadeh

Volume 24, Issue 6 , January and February 2010

https://doi.org/10.22067/jsw.v0i0.7512

Abstract
  Abstract Drought is one the most complicated and unknown natural disasters and rainfed agriculture is often the first sector to be affected by drought. In this research, we consider the drought monitoring from both meteorological and agricultural points of view. We have selected Standardized Precipitation ...  Read More

Effect of Different Irrigation and Substrate on the Growth and Yield of Lettuce (Lactuca Sativa l.cr Paris Island)

K. Davary; S.H. Nemati; B. Ghahraman; N. Sayari; P. Shahinrokhsar

Volume 23, Issue 4 , September and October 2009

https://doi.org/10.22067/jsw.v0i0.2467

Abstract
  This experiment was conducted at research greenhouse of college of agriculture, Ferdowsi University of Mashhad in 1381-1382. The experiment was designed based on the splitted plots in the form of completely randomized design and in four replications. Irrigation intervals were in three levels of 12, 4, ...  Read More