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)
Volume 63 (2010)
Investigation of ecological range and its effects on vegetative characteristics of A. sieberi populations in Iran

A Azarnivand; M Rabiee; H Arzani; Yones Asri

Volume 62, Issue 1 , June 2009

  With respect to wide distribution of A. sieberi Besser in Iran, various studies have been done on its habitats and different ecological properties have been referred as effective factors in establishment of this species. In this research, we tried to study the ecological range of A. sieberi and its ...  Read More

Land use planning for tourism development using Geographical Information Systems (GIS) (Case study: Taleghan Watershed, Khodkavand Sub-chatchment)

M Jafari; M Tahmoures; M. Naghiloo

Volume 62, Issue 1 , June 2009

  The use of GIS tools is one of the newest methods for performance of different land evaluation and planning projects. This research with the purpose of determination of appropriate landuse to natural land potential and improvement of land management of catchments was executed using GIS-tools in Taleghan ...  Read More

Effect of Camphorosma monspeliaca on soil elements in Chaharmahal and Bakhtiari province

H. Khedri Gharibvand; Gh. A. Dianati Tilaki; M. Mesdaghi; M. Sardari

Volume 62, Issue 1 , June 2009

  The aim of this research was to determine the effects of Camphorosma monspeliaca species on soil nutrient elements in its habitat. For rangeland, ecological positive or negative effects of plant species on environment must carefully be examined before allowing their plantation in vast areas; on the other ...  Read More

Determining Origin of groundwater recharge resources, drought and wet periods by isotopic tracers in Hashtgerd plain

H. Saadati; F. Sharifi; M. Mahdavi; H. Ahmadi; M. Mohseni Saravi

Volume 62, Issue 1 , June 2009

  The main structure of this study includes; isotopic tracer evaluation and measuring, to identify and origin of groundwater recharge, contributions determine of diffused recharge (DR) and concentrated recharge (CR) as well as determine drought and wet periods in Hashtgerd plain. The hydrochemical study ...  Read More

Investigation on the efficiency of neuro-fuzzy method and statistical models in simulation of rainfall-runoff process

A. Salajegheh; A. Fathabadi; M. Mahdavi

Volume 62, Issue 1 , June 2009

  Rainfall-runoff is one of complex hydrological processes that is affected by a variety of physical and hydrological factors. In this study statistical method ARMAX model, neural network, neuro-fuzzy (ANFIS subtractive clustering and grid partition) and two hybrid models of this methods were used to simulate ...  Read More

Comparison of field application of Muskingum-Cunge based schemes in rivers

M. Samimi; S. Kochakzadeh; A. Parvaresh-Rizi

Volume 62, Issue 1 , June 2009

  Muskingum-Cunge is one of the widely employed methods for flood routing. Direct calibration of the model based on previous flood events is not required and the routing parameters in this method are determined according to physical characteristics and hydraulic conditions of the stream. During the last ...  Read More

A comparison of degree-day and radiation base of Snowmelt Runoff Model (SRM)

A. Fathzadeh; M. Mahdavi; R.C. Bales; A. A. Abkar; Askari Shirazi

Volume 62, Issue 1 , June 2009

  In highland watersheds, runoff generated by snow melting plays an important role in stream water supply. SRM (Snowmelt Runoff Model) is a hydrologic model which simulates and predicts daily flow in mountain watersheds dominated by snow melting process. The SRM is based on the degree-day procedure which, ...  Read More

Annual rainfall forecasting based on synoptic patterns of tele-connection using statistical models

Gh. A. Fallah Ghalhary; M. Mousavi Baygi; M. Habibi Nokhandan; J. Khoshhal

Volume 62, Issue 1 , June 2009, Pages 111-124

  The research show that global climate changes and atmospheric general circulation are affected by large scale phenomena that occurred in the sea surface. These large scale phenomena are often named "climate large scale signals". These signals are calculated based on criteria such as sea Level Pressure ...  Read More

Relationship between Haloxylon persicum growth parameters and edaphic properties in planted habitat of Choupanan, Naein

H. Mohammadi; H. R. Karimzadeh; S. J. Khajeddin

Volume 62, Issue 1 , June 2009, Pages 125-137

  Study of soil and plant relationships is nessesery for ecological- based and appropriate management. The objective of this study is to determine the influence of edaphic properties on Haloxylon persicum growth and also, indentifing growth limiting soil properties for saxaul. The study was performed through ...  Read More

Effect of land use change and overgrazing on runoff, sediment and soil phosphorus losses in the Soolegan Watershed

M. Momeni; M. Kalbasi; A. Jalalian; H. Khademi

Volume 62, Issue 1 , June 2009, Pages 137-153

  The discharge of total suspended sediments (TSS) and dissolved nutrients from watersheds into receiving waters is a serious problem when natural vegetation is degraded by agriculture or overgrazing. This study was conducted in Soolegan Watershed to investigate land use change and overgrazing effects ...  Read More

Application of GIS for calculation of runoff (Case study: Kechik Watershed, Golestan province)

N. Noura; A. Kabir

Volume 62, Issue 1 , June 2009, Pages 153-166

  In this paper the utilization of GIS for the parameterization of rainfall- runoff process, physically based hydrological model components is described. The hytrogeneity of soil and vegetation in a catchment can be expressed with distribution functions of infiltration and soil storage capacities which ...  Read More