Volume 75 (2022)
Volume 74 (2021)
Volume 73 (2020)
Volume 72 (2019)
Volume 71 (2018)
Volume 70 (2017)
Volume 69 (2016)
Volume 68 (2015)
Volume 67 (2014)
Volume 66 (2013)
Volume 65 (2012)
Volume 63 (2010)
Volume 62 (2009)
Association between North Atlantic oscillation and precipitation in Iran with weekly time scale

Nafiseh Seyyed Nezhad Golkhatmi; Javad Bazrafshan; Arezo Nazi Ghameshlou; Parviz Irannejad

Volume 72, Issue 2 , September 2019, , Pages 427-442


  North Atlantic Oscillation (NAO) is one of large-scale signal that affects the north hemisphere. Various studies have investigated the correlations between Iran’s precipitations and North Atlantic Oscillation from monthly to yearly scales. This study has considered weekly time scale. The daily ...  Read More

Status and trends of dust storms in Iran from 1364 to 1384

Shirin Mohammadkhan

Volume 70, Issue 2 , August 2017, , Pages 495-514


  The phenomenon of dust storm causes a number of damages such as aggravation of heart or lung disease, air and land traffic. Occurrence of dust storm has been growing inrecent years and has created many problems in some cities of Iran. Dust storms of Iran arise either from internal or external sources. ...  Read More

Modification of Reconnaissance Drought Index (RDI) based on the best method of evapotranspiration estimation and probability distribution function

محمد قبایی سوق; Abolfazl Mosaedi

Volume 66, Issue 4 , March 2014, , Pages 565-582


  Reconnaissance Drought Index (RDI) is based on fitting a Log-normal distribution to the ratio of precipitation to evapotranspiration (ETo) values in selected periods. In this index value of ETo were calculated based on mean temperature by Thorenth-Waite (Th) method. Th method, may underestimated ETo ...  Read More

An Investigation on Trends of Annual and Seasonal Rainfall and Temperature in Different Climatologically Regions of Iran

Maryam Azarakhshi; Jalil Farzadmehr; Mahdi Eslah; Hossein Sahabi

Volume 66, Issue 1 , April 2013, , Pages 1-16


  Climate change is defined as long term and irreversible changes in the climatic behaviorof a region. Many studies have been conducted in different regions of the world on climatechange. The results of these studies show considerable changes in climatic factors especiallyin precipitation and temperature. ...  Read More

Spatial Variation of Bedload Shape Characteristic towards Downstream )Case Study: Ghalesar Watershed, Sari(

Ataolah Kavian; Fatemeh Adineh; Gorban Vahabzadeh; Abdolvahed Khaledi Darvishan

Volume 66, Issue 1 , April 2013, , Pages 131-144


  Investigating downstream changes in bed load shape can be useful to detect watershedhydrological processes and it is very important to design hydraulic structures and to managecapacity of large storage dams, properly. Regarding to doing of enforcement studies, thisresearch was conducted in Qalesar River ...  Read More