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 66 (2013)
Volume 65 (2012)
Volume 63 (2010)
Volume 62 (2009)
Developing Models of Daily Sediment Yield Estimation for Kojur Forest Watershed

Zakariya Asadolahi; Mahdi Vafakhah; Seyed Hamidreza Sadeghi

Volume 67, Issue 1 , May 2014, Pages 1-15


  Todays, dynamic models are supposed as the most important tools in erosion and sediment phenomenadue to their complexities and existence of many affecting factors. Towards, the present study wasconducted in the Kojour watershed for daily sediment modeling using daily rainfall, discharge andsediment during ...  Read More

Prediction of Landslide Hazard in Sikan River Basin Using Logistic Regression Model

Mohammad Reza Sarvati; Kazem Nosrati; Shima Hassanvandi; Babak Mirbagheri

Volume 67, Issue 1 , May 2014, Pages 17-29


  Landslides and slope instabilities are major hazards for human activities often causing economiclosses and property damages. Sikan River Basin (Ilam province) due to the topography, tectonic,lithology, and climate has enough potential for occurrence of this phenomenon. The objectives of thisstudy were ...  Read More

The Comparison of Soil Loss and Sediment Yield of Some Geology Formations in Plant Vegetation Gradients (Case study: Summer Rangelands of Balade in Mazandaran Province)

Shafagh Rastgar; Hossein Barani; Ali Darijani; Vahedberdi Sheikh; Jamshid Ghorbani; Mohammad Ghorbani

Volume 67, Issue 1 , May 2014, Pages 31-44


  Vegetation cover as the main factor affecting the water erosion plays an important role in preventingsoil loss. To this end, for better understanding the impact of vegetation cover on soil erosion andsediment yield over the major existing geological formations in the summer rangelands of Balade inthe ...  Read More

Plant Species Distribution Modeling Using Logistic Regression Models in the North East of Semnan

Mohammad Ali Zare Chahouki; Lyla Khalsi Ahvazi; Hossein Azarnivand

Volume 67, Issue 1 , May 2014, Pages 45-59


  The aim of this study was providing plant species predictive habitat models by using logisticregression method. For this purpose, study area conducted in north east rangelands of Semnanmodeling vegetation data in addition to site condition in formation including topography, and soil wasprepared. sampling ...  Read More

Effects of Agricultural Activities on Land Degradation in the Khatam City

Gholamreza Zehtabian; Hassan Khosravi; Ali Azareh

Volume 67, Issue 1 , May 2014, Pages 61-72


  Need to Increasing agricultural land in order to improve food resources in the past two centuries recentlead to widespread changes in land use and improper management of these lands. Continue thisprocess can lead to land degradation and desertification, and improve such soils is very costly;Therefore, ...  Read More

Effects of Shrubs on Preserving Understory Plants against the Livestock Grazing

Tahereh Sadeghi Shahrakht; Mohammad Jankju; Mansour Mesdaghi

Volume 67, Issue 1 , May 2014, Pages 73-82


  Rangeland shrubs may provide mechanical facilitation on their understory plants, by protecting themagainst the livestock grazing. However, such a facilitation effect may vary depending on the rangelandutilization rate. In a field research, mechanical facilitation of rangeland shrubs was compared in ahighly ...  Read More

The Study of Biological Soil Crust (Mosses) Roles in Protection of Surface Soil in front of Water Erosion (Case study: Rangelands around Torogh Dam in Khorasan Razavi Province)

Fariba Alavizadeh; Kamalledin Naseri; Ali Golkarian; Ali Tavili

Volume 67, Issue 1 , May 2014, Pages 83-92


  Soil erosion is a main hazard in most area of the country specially in arid and semi-arid regions and itis very important because of sedimentation, pollution, increased flooding and its negative effects onsoil productivity. One of the features of arid and semi-arid areas is the presence of low cover ...  Read More

Comparing the Accuracy of Soil Map Prepared by Geopedology and Usual Method of Iran (Case Study: Kouhin)

Zohreh Alijani; Fereydoun Sarmadian; Seyed Rouhollah Mousavi

Volume 67, Issue 1 , May 2014, Pages 93-102


  Today, extensive improvements in fields of soil mapping have increased the purity and accuracy ofsoil maps. Usual mapping methods moreover depend on skills and experience of surveyor inidentifying and delineating the boundaries, also need the high cost and time consuming that face thesoil mapping with ...  Read More

Suitable Species Diversity Abundance Model in Three Grazing Intensities in Dizaj Batchi Rangelands of West Azerbaijan

Javad Motamedi; Esmaeil Sheidai Karkaj

Volume 67, Issue 1 , May 2014, Pages 103-115


  Species diversity is one of the important characteristics shows rangeland ecosystems changes, which isalready under effects of management practices. Thus, this research was conducted to study speciesdiversity variation and assess suitable distributive abundance model in three rangeland sites in WestAzerbaijan. ...  Read More

Determining of Effective Factors on Gully Longitudinal Advancement (Case study: Dareh Koreh Watershed)

Aliakbar Nazari Samani; Fatemeh Avazadeh Tavakoli; Hassan Ahmadi; Gholamreza Rahi

Volume 67, Issue 1 , May 2014, Pages 117-126


  Gully erosion is one of the most destructive types of channeled water erosion that removes aconsiderable volume of soil as it develops. This type of erosion consists of complex a geomorphicprocess that has been known as an indicator of accelerated soil erosion. In this research theadvancement of 25 headcuts ...  Read More

Application of Artificial Neural Networks in Simulating and Forecasting of Meteorological Drought Decile Percentage Index (Case study: Sistan & Balouchestan Province)

Arash Malekian; Mahrou Dehbozorgi; Amir Houshang Ehsani; Amir Reza Keshtkar

Volume 67, Issue 1 , May 2014, Pages 127-139


  Consecutive droughts in Sistan and Baloochestan province cause water resources restriction and this isa very significant problem for this region. In this study, in order to forecast the drought cycle in 9climatological stations in the province, we used Artificial Neural Networks. The input data wereaverage ...  Read More

Stakeholders’ Analysis, Social Power and Network Analysis in Natural Resources Co-Management

Mahdi Ghorbani; Mahrou Dehbozorgi

Volume 67, Issue 1 , May 2014, Pages 141-157


  Nowadays, a lot of natural resource co-management plans due to lack of attention to stakeholders’characteristics and position in network of social relationships have failed. Actors or key personnel’srecognition has been one of administrative requirement of natural resources co-management ...  Read More