1 2251-7812 University of Hormozgan 100 Using 137Cs Technique to Investigate Soil Redistribution Rates by Portable HPGe (Case Studies, Kachik Paired Subcatchments) Hossen Alizadeh M. Ahmadi H. Feiznia S. Rivaz F. Nasari M.S. 1 8 2012 2 2 1 14 29 04 2014 29 04 2014 137Cs technique for determining soil particles redistribution is of tremendous importance considered by most soil and water conservation experts. Due to time and monetary limitations for spectrometry in the lab, a portable High Pure Germanium Detector was used in this study. For this, Kachik paired subcatchments were chosen and 60 positions in each subcatchment were used for spectrometry analyses. A total of 108 soil samples from the reference area were selected and their spectrometries acquired in the lab. With regards to in situ spectrometry, 90% of each of the subcatchment positions belonged to erosion and covered all areas of interest. However sedimentation positions belonged only to stream and river facies. Using Mass Balance II, the annual soil erosion for test and sample subcatchments were 10.1 and 11.4 t/ha, respectively. For these subcatchments, SDR was 98 and 99. It should be noted that the use of a portable High Pure Germanium Detector needs a reference area as the traditional 137Cs technique.
101 Use of Steel Manufacturing Slag (Foulad Mobarake Co.) as Mulch to Stabilize Wind Eroded Sediment Case Study: Soils in East of Isfahan karim-zadeh hamidreza rohani shakraki farzad 1 8 2012 2 2 15 24 29 04 2014 29 04 2014 This research was performed at the Natural Resources Department Research Farm of Isfahan University of Technology to investigate the effect of slag mulch on the amount of wind erosion and its threshold velocity using a wind tunnel. Soil samples from the study area “segzy plan” in the East area of Isfahan were placed in 100 by 30 cm trays to a depth of 3 cm. Four levels of coverage of slag: 25, 50, 75, and 100 percent and three aggregation sizes of 15-30, 30-45, and 45-60 mm and two thicknesses of one layer and two layers with four repetitions were used. Wind velocities were measured at a height of 20 cm from the soil surface. Each treatment was conducted for a duration of 5 min. The data were analyzed by SPSS and Excel in the form of complete random plan and statistical factorial design. The results showed no significant difference in the 5% level between the numbers of layers. Wind erosion decreased exponentially with increased coverage level and aggregation size. The best treatment was the use of slag at 75% coverage levels and 30-45 mm aggregate size in one layer, which included economic and performance feasibility. 103 Investigation of the Role of Different Land Uses in a Sand Storm by using Wind Rose and Storm Rose (Case Study: Kashan) 1 8 2012 2 2 25 41 03 05 2014 03 05 2014 The purpose of this research is to analyze anemometer data to study the wind regime in Kashan and to investigate the role of different land uses in sand storms. Therefore, anemometer data obtained from synoptic station of Kashan were analyzed during a 40-year period (1966-2005) using different methods. Seasonal and annual wind roses and storm roses for different lands were created using WRPlot software (considering the various threshold wind velocity for each area). Finally, the annual wind rose showed that the direction of the prevailing wind in Kashan was from the Northeast, followed by North and Northwest winds. It was shown that the frequency of calm winds was 8.84%. Storm roses that related to the different lands showed that in the pasture lands, the winds of the Northeast, North and West and in incult crop lands and active sand dunes, the winds from the Northeast, North and West had the most role in wind erosion. Also, the risk of soil erosion was not tangible in agricultural lands, sand dunes covered with haloxylon and reg. The drawing of seasonal storm roses in each of the studied lands showed that the erosive winds had the highest frequency during the Spring. In this season, the most erosive winds blow with a speed more than 25 m/s. 104 Gully Erosion Susceptibility Assessment using Multivariate Regression Model (Case Study: Kiasar, Southern Mazandaran Province) 1 8 2012 2 2 42 57 03 05 2014 03 05 2014 Gully erosion when it comes to positive processes in the most severe operating conditions and the most favorable conditions for the performance of other words is a positive process. One of the most important issues discussed gully erosion monitoring and evaluation of benchmarking is to extract and identify the type of erosion. In this paper the groove factor and drainage ditches, and selected as the dependent variable and measures such as lithology, land use, soil. figures from the Regional Physiographic characteristics (slope, aspect, topographic wetness index, the amplitude factor and the power factor) as independent variables or risk factors using multivariate regression methods based on maximum correlation between the dependent variable and variables regression equation between the factors we extract an independent venture. Independent variables with the dependent variable was dedicated channel to each of the factors underlying coefficients. Susceptibility to erosion in the ditch next step was divided into five categories and the results became clear that the greatest contribution in terms of sensitivity to ditch the factors lithology, soils, topography and land were allocated to the moisture index. line with the classification based on floor area of ​​greatest sensitivity to erosion, gully erosion, low and lowest share belongs to the class is too much erosion. 55 Assessment of Mass Movement Hazard Zonation using the Japan Road Institute Method along the Chendar-Shahrak Road, Taleghan, Iran feiznia sadat rahimi raziye ahmadi hasan 1 8 2012 2 2 58 72 15 01 2014 08 07 2014 One of the most important  natural hazards which threatens  the roads in mountainous regions are hillslope instabilities. This phenomenon is more frequent while  the roads are under construction.  Indentification of dangerous and susceptible areas to mass movement is especially important in order to implement some measures to control these natural phenomena.In this study mass movement hazard zonation of  Chendar-Shahrak Road, Taleghan was performed using Japan Road Institute Method. This method rates 12 effective factors in slope instabilities. In this research, first by considering the shape of gradient, polygons were made around the road and each polygon was considered as a work unit and the parameters were rated in each polygon.The results show that in the part of the road  without retainers, 9.85% of  the road is susceptible, 13.62% probably susceptible and 76.5% stable to mass movement. Then by using air photos, landsat images and field controls, the inventory map of mass movements aroud the road was prepared.  Then mass movement zonation map of the area which was prepared using Japan Road Institute Method was evaluated using Sum of Quality. The results show that Japan Road Institute Method is a suiatable method for performing mass movement hazard zonation around the roads. 106 The effect of morphotectonic factors on erosion and change of longitudinal profile of river using the mathematical functions (Case Study: Alvand River in the West Kermanshah Province) 1 8 2012 2 2 73 95 03 05 2014 03 05 2014 The river’s Geomorphology and its evaluation explore explanation of erosion, the longitudinal profile of the river bed and different forms of the rivers. Alvand River as the main river of the Alvand basin is located in Kermanshah Province W, Iran. The aim of this study is to investigate changes in longitudinal and longitudinal profiles of the river bed using mathematical functions and their relationship with the land and its base. Using the Applied-Developed research method, analytical-statistical and field study method is used in this paper.The results show that, the evaluation of longitudinal profiles and morphological forms of the river bed is in relation with various factors such as erosion, tectonics, lithology and geomorphological elements such faults. The rivers located in the upper part, are fitted with a linear function due to this part of the basin is affected by activities tectonic. The middle and low parts except Alvand 2 which are affected by tectonic activities, other parts due to tectonic activity on weak lithologycal structure, have been fitted with an exponential function and contains bed and bank erosions. 107 The effect of morphotectonic factors on erosion and change of longitudinal profile of river using the mathematical functions (Case Study: Alvand River in the West Kermanshah Province) 1 8 2012 2 2 96 114 03 05 2014 03 05 2014 The river’s Geomorphology and its evaluation explore explanation of erosion, the longitudinal profile of the river bed and different forms of the rivers. Alvand River as the main river of the Alvand basin is located in Kermanshah Province W, Iran. The aim of this study is to investigate changes in longitudinal and longitudinal profiles of the river bed using mathematical functions and their relationship with the land and its base. Using the Applied-Developed research method, analytical-statistical and field study method is used in this paper.The results show that, the evaluation of longitudinal profiles and morphological forms of the river bed is in relation with various factors such as erosion, tectonics, lithology and geomorphological elements such faults. The rivers located in the upper part, are fitted with a linear function due to this part of the basin is affected by activities tectonic. The middle and low parts except Alvand 2 which are affected by tectonic activities, other parts due to tectonic activity on weak lithologycal structure, have been fitted with an exponential function and contains bed and bank erosions. 280 Runoff simulation using geomorphological instantaneous unit hydrograph (GIUH). (case study: Bar basin-Khorasan Razavi) 1 8 2012 2 2 115 126 16 11 2015 16 11 2015 Considering the most of country have no gage station, in recent year one method can be proposed with the involvement of other information, which will affect hydrology condition. It can estimate flood water level. In this study, considering relationship between geomorphology and hydrology, using little information, flood hydrograph were simulated. This method is named geomorphological instantaneous unit hydrograph (GIUH). At first, the drainage basin was ranking using Strahler method. Then, the quantitative geomorphologic parameter concluding ratio of bifurcation (RB), ratio of area (RA), ratio of length (RL) and length of last order (L;Omega) were calculated considering this ranking. Then using these parameters and the peak flow velocity in outlet, peak discharge in outlet and time to peak of instantaneous unit hydrograph were calculated. For model evaluation, five events were selected from hydrometry station in outlet of basin, compared with computational hydrograph using GIUH model. Result show that, this model is suitable for this area, and little difference between observed and computed hydrograph was due to construction of earth dams in upstream, which affect hydrology conditions.