Volume 77 (2024)
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)
Volume 62 (2009)
Landslide hazard zonation using F-AHP method and proposition of appropriate preventive procedures (A Case Study: Nekaroud watershed)

Ommolbanin Kazemi Gordgi; Hasan Ahmadi; Mohammad Jafari

Volume 70, Issue 3 , December 2017, , Pages 763-775


  The ultimate aim of any research on the mass movement processes is to prepare zonation map and classify area into different degrees of hazard in order to mitigating related damages. This study was undertaken using F-AHP & GIS within Nekaroud watershed in Mazandaran province. Pairwise comparisons ...  Read More

Technical assessment of watershed operating steps in sologan aquifers basin

golaleh ghaffari; Hasan Ahmadi; Omid Bahmani; Ali Akbar Nazari Samani

Volume 70, Issue 1 , June 2017, , Pages 169-180


  Although more than 45 years has passed since the first time operating watershed projects were run inside the country and considering the increasing budget that is being allocated to such projects, terrible soil erosion, natural resource degradation and the dazzling and painful consequences of such events ...  Read More

Investigation of the role of temporal distribution of precipitation on forage production value of the rangeland

Maryam Azarakhshi; Mohammad Mahdavi; Hasan Ahmadi; Hosein Arzani; Jalil Farzadmehr

Volume 68, Issue 4 , January 2016, , Pages 885-899


  Plants cover composition, condition, trend, production, and grazing capacity of the rangeland change annually. In this research, the role of temporal rainfall distribution on rangeland production was assessed. This research had down in the rangelands of Ilam (with semiarid to semi humid climate) and ...  Read More

Evapo-transpiration estimation in Taleghan Drainage Basin using MODIS images and SEBAL model

kazem Nosrati; Mohsen Mohseni Saravi; Hasan Ahmadi; Hosein Aghighi

Volume 68, Issue 2 , September 2015, , Pages 385-398


  Estimation of evapo-transpiration is necessary in cases such as irrigation planning, determining of evaporation of the water bodies, water balance assessment, estimation of runoff and watershed management and ecological and meteorological studies. Evapo-transpiration can be determined precisely using ...  Read More

Study Of Effective Factors On Sediment Yield of Loess Deposits Using Rainfall Simulator

Mohammad Nohtani; Sadat Feiznia; Hasan Ahmadi; Hamidreza Peirovan

Volume 68, Issue 2 , September 2015, , Pages 399-412


  Loess Deposit is one of the most important Quaternary Deposits of northeastern parts of Iran which have high erosion rate. This study was performed with field- Rainfall- Simulator which has a plot area of 1 m2 in Gorganrood Drainage Basin to determine the effective factors on sediment yield. Landuse, ...  Read More

Determination of deep infiltrate level of sediment in floodwater spreading fields (Case study: Gachsaran station)

mohsen padyab; Sadat Feiznia; Hasan Ahmadi; Ardeshir Shafei

Volume 68, Issue 1 , June 2015, , Pages 15-24


  Evaluation of changes present in soil and water resources due to operation implement of floodwater spreading is necessary to assess their positive or negative resultant effect. Rate of the internal sediment to diversion spreader channels, surface sedimentation and aggregation of the spreading field depth ...  Read More

Investigation of sediment sources of Drainage Basin by fingerprinting Method

Sadat Feiznia; Asghar Kouhpeima; Hasan Ahmadi; Ali Asghar Hashemi

Volume 66, Issue 2 , July 2013, , Pages 299-306


  Due to successes of fingerprinting method in producing rapid and low-cost information of sediment sources, in this research this method was used in three sub-cathments of Chasht-Khoran Basin in Semnan Province: Amrovan, Atari and Ali-Abad. Samples below 63 μm were separated and 15 fingerprinting propertis ...  Read More

Investigation of Sand Drift Potential by Wind (Case Study: Kashan Plain)

Tayyebeh Mesbahzadeh; Hassan Ahmadi

Volume 65, Issue 3 , December 2012, , Pages 411-422


  Sand dunes mobility is one of the serious problems in arid regions. Since wind regime is one of the important factors in sand dunes formation, its frequency, direction and magnitude can be effective. Amount of wind energy and its directional variability (wind regime) have significant control on the morphology ...  Read More

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

Assessment of Wind Erosion Intensity by IRIFR. E.A Model (Case Study: Abuzeidabad, Kashan)

T Mesbahzadeh; H Ahmadi; Gh Zehtabian; F Sarmadian

Volume 63, Issue 3 , December 2010, , Pages 399-415

  Investigation and preparing of wind erosion intensity maps are the main objectives of this research. In this research, the working unit map was prepared and then nine effective factors in wind erosion according to IRIFR.E.A model are determined at each of seven homogeneous units. According to the results, ...  Read More

A Study on the Topographic Threshold and Effective Factors on Sediment Production and Gully Development in Neyriz,Fars Province

S.M Soleimanpour; majid Soufi; hassan Ahmadi

Volume 63, Issue 1 , June 2010, , Pages 41-52

  Gully erosion has an important role in Fars province due to sediment production and enormous damages to land, roads and infrastructures. In this research, 15 gullies were selected to measure their morphometric characteristics. The length, depth, top and bottom width and volume of gully erosion were then ...  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

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