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)
Comparative study of transpiration and dry matter production in rangeland species of Medicago sativa, Trifolium repens, Sanguisorba minor and Trifolium pratens

S. Ebrahimi; S.H Sadeghi

Volume 62, Issue 2 , October 2009, Pages 167-173

  Recognition of rangeland species with the maximum efficiency and the minimum water usage is very important, since major parts of rangelands in Iran are located in arid and semiarid climate. In addition, the rangeland improvement and management on the basis of transpiration rate of rangeland species in ...  Read More

Determination of animal unit equivalent (AUE) and daily requirement energy for Sanjabi sheep breed

H. Arzani; A. Esfandiari; H. Nourozian; M. Ghorbani; J. Torkan

Volume 62, Issue 2 , October 2009, Pages 175-186

  Knowledge on animal requirement, available forage and its quality is fundamental for successful livestock and range management. Since sheep is dominant grazing animal of rangelands in Iran and there are over 27 sheep breeds and each breed has special body size, physiological condition and consequently ...  Read More

Calibration of data from Class A pan with Thornthwaite method in arid regions of Iran

A. Afzali; M. Mahdavi; M. A. Zare Chahoki

Volume 62, Issue 2 , October 2009, Pages 187-196

  The most precise and simple method of evaporation measurement is application of pans in which class A pan is used in Iran. In contrast, there are many empirical methods which are used for estimating the evapotraspiration. In this study, Thornthwaite method was used due to the simplicity of its parameters ...  Read More

Investigation of environmental factors affecting vegetation distribution in the Zirkouh rangelands of Qaen

M. Jafari; A. Tavili; M. Rostampour; M. A. Zare Chahouki; J. Farzadmehr

Volume 62, Issue 2 , October 2009, Pages 197-211

  This study was carried out to investigate the effective environmental factors in the distribution of vegetation in Zirkouh rangelands of Qaen. After delimitation of the study area, sampling of soil and vegetation were performed using randomized- systematic method. Vegetation cover was recorded by using ...  Read More

Assessment of runoff and sediment generation in Neogene's units under rainfall simulator (Case study: Taleghan Basin

S. H. Hosseini; S. Feiznia; H. R. Peyrovan; Gh. R. Zehtabian

Volume 62, Issue 2 , October 2009, Pages 215-228

  In Iran, fine grained formations (Neogene's units) are very susceptible to erosion. Also, they are the units producing runoff and causing soil loss in watersheds. The objectives of this study is to assess the effect of physical - chemical and mechanical properties of these formations on sediment and ...  Read More

Variation of shear resistance parameters in fine grain soils due to willow roots density

M. H. Davoudi

Volume 62, Issue 2 , October 2009, Pages 231-245

  Stabilization of river terraces and natural soil slopes in rangelands by means of tree roots as a reinforcement agent is an environmental adopted method which needs to be developed. In this research a series of tests was carried out on soil blocks containing willow roots and without roots using a large ...  Read More

Watershed system planning and management using optimization model (Case study: Gharmabdasht Watershed)

F. Daliri; H. S. Seraji; M. Kholghi

Volume 62, Issue 2 , October 2009, Pages 247-257

  The system analysis plays an important role in natural resources, water resources and industrial engineering. In recent years, most parts of Iran like Golestan province, due to the lack of integrated river basin management, have been suffered numerous losses in variant environmental, social and economic ...  Read More

Statistical analysis of return period of drought conditions in Isfahan province using the Standardized Precipitation Index

S. Saadati; S. Soltani; S. eslamian

Volume 62, Issue 2 , October 2009, Pages 257-270

  Drought is universal phenomenon that can occur everywhere and can cause harmful impacts on human beings and natural ecosystems. Thus, it is very important to study drought character ristics part of for water resources management. In this study, the Standardized Precipitation Index (SPI) is used for drought ...  Read More

Estimation of the suspended sediment loud of Karaj River using fuzzy logic and neural networks

A. Salajegheh; A. Fathabadi

Volume 62, Issue 2 , October 2009, Pages 271-282

  Correct estimation of suspended sediment transported by a river is an important practice in water structure design, environmental problems and water quality issues. Conventionally, sediment rating curve used for suspended sediment estimation in rivers. In this method discharge and sediment discharge ...  Read More

Modeling river suspended load using fuzzy logic approach (Case study: Zanjanroud Basin)

B. Motamedvaziri; H. Ahmadi; M. Mahdavi; F. Sharifi; N. Javaheri

Volume 62, Issue 2 , October 2009, Pages 283-298

  Estimation of river sediment load is one of the most important issues in design of hydraulic structures, investigating water quality, conserving fish habitat, estimating erosion and determining watershed management effects. There are two methods for estimating sediment load: empirical and hydrological ...  Read More

Studying the effects of land use change on soil physical and chemical quality indicators of surface horizons in rangelands of eastern Qazvin province

M. Navidi; F. Sarmadian; Sh. Mahmoudi

Volume 62, Issue 2 , October 2009, Pages 299-309

  Sustainable exploitation of land resources is directly affected by considering soil quality which finally will also conclude environmental protection. Therefore, assessing different soil quality aspects which are sensitive to various land management practices seems too important. In this study, some ...  Read More