Volume 76 (2023)
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)
Issue 4 March 2013, Pages 433-580
Issue 3 December 2012, Pages 277-432
Issue 2 September 2012, Pages 159-276
Volume 63 (2010)
Volume 62 (2009)
Assesment of the Standard Index of Annual Precipitation,Standardized Precipitation Index and Palmer Drought Severity Index in the Rangelands of Qom Province

Maryam Azarakhshi; Behnoush Farokhzadeh; Mohammad Mahdavi; Hossein Arzani; Hassan Ahmadi

Volume 65, Issue 2 , September 2012, Pages 159-174


  Iran is located in dry belt of the earth and always involved with drought in different sections. Drought has already caused many losses to natural plant cover, agriculture and human society. For drought monitoring, we can use some drought indecies. In this research, the Standard Index of Annual Precipitation)SIAP),Sandardized ...  Read More

Evaluation of Vegetation Indices for Preparing Vegetation Cover Percentage in Semi-arid Lands of Central Iran (Case Study: Ghareh Aghaj Watershed)

Fazel Amiri; Hassan Yeganeh

Volume 65, Issue 2 , September 2012, Pages 175-189


  فرآیند ارزیابی پوشش گیاهی به وسیلة تصاویر ماهواره‌ای نیازمند استفاده از شاخص‌های گیاهی است. شاخص گیاهی بطور گسترده‌ای برای ارزیابی و پایش تغییرهای بو شناختی (اکولوژیک) ...  Read More

Investigation of Carbon Storage Potential of Artemisia aucheri, Agropyron elongatum, Stipa barbata, in Semi-arid Rangelands of Iran (Case study: Peshert Region, Kiasar)

Zeinab Jafariyan; Leila Tayefeh Seyyed Alikhani; Reza Tamartash

Volume 65, Issue 2 , September 2012, Pages 191-202


  Carbon sequestration potential of three species including Agropyron elengatum, Stipa barbata and Artemisia aucheri was evaluated in parts of a semi-arid rangeland in this study. After determination and selecting key areas as study sites, sampling from vegetation and soil, based on randomized systematic ...  Read More

The Most Appropirate Quadrate Size and Shape for Determing Some Characteristics of a Semi-steppic Rangeland

Pejman Tahmasebi; Ataollah Ebrahimi; Nabiollah Yarali

Volume 65, Issue 2 , September 2012, Pages 203-216


  هنگاهی می‌توان قضاوت درستی در ارزیابی پوشش گیاهی مرتع داشت که طرح آماربرداری انتخاب شده باشد. از این‌رو تعیین یک اندازه و شکل قطعه مناسب که بتواند دقت و صحت مناسبی در ...  Read More

Determination of daily Animal Requirement for Lori Sheep Race in Rangeland Feridonshahr

Ebrahim Gavili; Mohammadreza Vahhabi; Fazel Amiri; Shiva Rashidi

Volume 65, Issue 2 , September 2012, Pages 217-229


  For planning the grazing of rangeland according to difference in body weight and different energy requirements should determine forage requirement of animal unit. In the other hand, daily need of animal in rangeland depends on the quantity and quality of intake forage composition. For this purpose selected ...  Read More

Assessment of the Effect of Input Factors Number in Accuracy of Artificial Neural Network for Landslide Hazard Zonation (Case study: Haraz Watershed)

Hamidreza Moradi; Alireza Sepahvand; Parviz Abdolmaleki

Volume 65, Issue 2 , September 2012, Pages 231-243


  More than 30% of Iran's land is formed from mountainous areas. So each year, landslides cause damages to structures, residential areas and forests, creating sedimentation, muddy floods and finally deposit the sediments in reservoir dams. Therefore, for preventing of this damages and expressing the sensitivity ...  Read More

Comparison of Infiltration Rate in Bare Soil and Ring-shaped Growth Pattern of Iris songarica and Scripoides holoschoenus species and Evaluation of Green-Ampt and Horton Infiltration Models

Asghar Mosleh Arani; Hamidreza Azimzadeh

Volume 65, Issue 2 , September 2012, Pages 245-256


  Plant cover is one of the most important factors affecting infiltration rate of water into the soil and decreasing runoff. Distribution of plants in arid and semi-arid areas is almost patchy and form different patterns. One of the fascinating patterns is ring-shaped growth pattern. Ring patterns of varying ...  Read More

Regional Analysis of Hydrological Drought in Sefidrood Drainage Basin Using Base Flow Index

Kazem Nosrati

Volume 65, Issue 2 , September 2012, Pages 257-267


  The term hydrological drought is applied to represent low water levels in streams, reservoirs and lakes as well as a low groundwater level. Base flow index (BFI) as one of low flow indices gives the ratio of base flow to total flow and investigates basin’s ability to store and release of water in drought ...  Read More