@article{ author = {kheyrandish, hamed and pishdad, samira and esmaeilpour, yahy}, title = {Qualitative and Quantitative Assessment of Check-dams Effectiveness for Flood Sediment Deposition (Case Study: Dam-tang Watershed, Darab)}, abstract ={One of the simple methods for erosion control, flood mitigation and flood damage reduction in the streams is building the check-dams. The present study was carried out to evaluate the performance of check-dams, location across the streams in the retention of the fine sediments in Dam-tang watershed in Darab Iran. For this purpose, two of streams with many stabilized check-dams which were more than 15years old were selected. Deposition of sediments behind the dams, the natural soil and litter along the normal channels 0 -30 cm depth sample preparation was mixed with hydrometer tests and gradation in the tissue. For each stream, three check-dams (one at the far beginning (upstream), the second one at the middle and the third one at the far downstream) were selected. In each stream, a number of samples were taken from retained sediment behind the selected check-dams and also original soil was taken from both sides of the same check-dams. In the same way, results showed that the sand retained behind the first check dam, was more than the sand behind the second and first check-dams, respectively. Therefore, if the retention of the fine sediments is the main purpose of the check dam construction, it is recommended that they be built in the far downstream rather than in the upstream of waterways.}, Keywords = {Fine sediments, Check-dams, Stream, Erosion}, volume = {5}, Number = {2}, pages = {1-14}, publisher = {University of Hormozgan}, url = {http://magazine.hormozgan.ac.ir/article-1-205-en.html}, eprint = {http://magazine.hormozgan.ac.ir/article-1-205-en.pdf}, journal = {Environmental Erosion Research Journal}, issn = {2251-7812}, eissn = {2717-3968}, year = {2015} } @article{ author = {}, title = {Analysis of Flood Hydraulic in Alluvial Fan River using CCHE2D Case Study: (Roodan River)}, abstract ={In this study the advantages and importance of a numerical model to predict and monitor the processes governing hydraulic changes alluvial fan river is discussed. For this reason and because of the importance of flow velocity and shear stresses resulting from the erosion of the river, A two-dimensional numerical model to simulate the CCHE2D river changes ranging from Roodan River is used. In this study by the use of large-scale maps of the topography of the area under study Were prepared The model geometry and computational grid with different dimensions, and then measured streamflow characteristics Dimensional hydrodynamic model of moderate depth, implementation and results of the distribution of depth, velocity, specific discharge, shear stress were obtained in the Fan river. The statistical criteria RMSE and MAPE data from the simulation model against observed data, which were Error model for depth with RMSE index Respectively 0. 0851 And MAPE values 5.02 Percentages were calculated. The results showed that the simulated data were compared with data obtained from field measurements are very similar.}, Keywords = {Simulation, CCHE2D, Alluvial fan, Roodan River.}, volume = {5}, Number = {2}, pages = {15-31}, publisher = {University of Hormozgan}, url = {http://magazine.hormozgan.ac.ir/article-1-244-en.html}, eprint = {http://magazine.hormozgan.ac.ir/article-1-244-en.pdf}, journal = {Environmental Erosion Research Journal}, issn = {2251-7812}, eissn = {2717-3968}, year = {2015} } @article{ author = {fazli, somayeh and noor, hamzeh and Asadolahi, Zakari}, title = {Comparing Efficiency of Hill Slope Erosion Model (HEM) in Dry and Abandoned Land (Case Study: Khosbijan Research Center, Arak}, abstract ={Soil erosion and sediment yield from watersheds confine sustainable use of land resources and is supposed as one of the most critical environmental issues. Prediction of storm wise soil erosion and sediment yield is very important, especially in arid and semiarid regions due to small number of events and high intensity of rainfall. Evaluation of soil erosion by existing models is needed as an important tool for managerial purposes in designation proper water and soil conservation technique. Sometimes inappropriate use of the model causes very high or low estimate. The present study aimed to assess the applicability of Hillslope Erosion Model (HEM) for prediction of storm related sediment yield in Khosbijan by using soil erosion standard plots in two common land use in semi arid region i.e. dry land and abandoned land. In order to run the model, runoff depth, land surface cover, soil texture, slope steepness and length were determined for 16 storm events. In calibration stage, 75% o f data were used and 25% used in validation stage. The results showed that the uncalibrated HEM didn’t simulate the observed sediment yields, properly in two selected land use. While it could successfully predict the soil erosion rate in plots on dry and abandoned land by calibrating soil erodibility parameter with determination coefficient of 0.61, 0.78 and estimate error of 38 and 25 percent, respectively. The results also, clearly showed that HEM better efficiency in abandoned landuse.}, Keywords = {Hillslope Erosion, Landuse, Model Calibration, Soil Erosion Model}, volume = {5}, Number = {2}, pages = {32-45}, publisher = {University of Hormozgan}, url = {http://magazine.hormozgan.ac.ir/article-1-195-en.html}, eprint = {http://magazine.hormozgan.ac.ir/article-1-195-en.pdf}, journal = {Environmental Erosion Research Journal}, issn = {2251-7812}, eissn = {2717-3968}, year = {2015} } @article{ author = {Gholami, Hamid and Taherimoghadam, Elham and Najafi, Mehdi and Mahdavi, Rasol}, title = {Determining contribution of different landuse of sand dunes sediments using fingerpriting}, abstract ={Recognition of origin of sand dunes is very important in wind erosion control projects. Because of many problems associated with traditional procedures for identifying sediment sources, fingerprinting techniques, based on physical, chemical and organic properties of sediment and source materials, are increasingly being used as a valuable and effective alternative approach to assembling such information. In this method, a suitable composite (set) of diagnostic properties and a multivariate mixing model are employed to estimate the relative contribution of sediment sources to sediments transported to basin outlet. In this study, using suitable composites of geochemical elements, capable of discriminating of the study basin,were used to determine contributions of that sub basins to sediment yield. For this aim, 20 surface samples from the 3 sources region facies and 5 samples from sand dunes were collected and Particles less than 62.5 as the target were tested. Elements were used as tracer. Then, Initial choice and optimal combination of tracers were done by Statistical methods including one-way Anova analysis of variance tests, Kruskal-Wallis, and Discrimination Analyze. the method using discriminant analysis 2 tracer(Manganese, Calcium) The tracers were used as the right combination. Finally, Contribution of the various land used Farmlands, Range and arid lands 50.52, 26.34, 23.14% respectively. The total highest sediment land used produce. Low absolute errors 3.6% and predicted properties. High model efficiencies 96% . the fingerprinting approach to source ascription has high efficiency to determine relative importance of sediment sources (subbasins) in the study basin.}, Keywords = {Provenance, Sediment sources, Hybrid Models, Tracers, Discriminant analysis}, volume = {5}, Number = {2}, pages = {46-54}, publisher = {University of Hormozgan}, url = {http://magazine.hormozgan.ac.ir/article-1-228-en.html}, eprint = {http://magazine.hormozgan.ac.ir/article-1-228-en.pdf}, journal = {Environmental Erosion Research Journal}, issn = {2251-7812}, eissn = {2717-3968}, year = {2015} } @article{ author = {shakeri, fazel and ekhtesasi, mohammad rez}, title = {Desertification intensty assessment of Lar city area}, abstract ={Now days desertification of lands in phenomelal that threaded different region of world specially arid, semi arid and semi-arid humid. In this research whit using of two Irainian new methods: IMDPA that is based on geometric sum and MICD that is based on arithmetic sum. Desertification capacity of Lar city area during recent half century (from 1995 to 2005) has considered with emphasis on factor of urbanization and industrial development. For this purpose as region situation was used following five indexes: the ratio of the potential population acceptance to actual population, the raito of residential and industrial lands to horticultural and agricultural lands, road and mine density, and percapital green areas. Finally studies showed in IMDPA method 43.79 persent of total region (hectare 4348.67) in low class of desertification, 35.01 persent (hectare 3476.62) in medal class, 21.09 persent (hectare 2049.21) in severe class and 0.11 persent (hectare 10.54) which it sets to the high severe desertification. Whereas in MICD method 43.8 persent of total region (hectare 4349.12) in low class desertification, 26.38 persent (hectare 2619.92) in medal class and 29.82 persent (hectare 2961) which it sets to the severe desertification. Ingeneral as for scoring method in MICD through indexes Pirewise comparison with done Analytical Hierarchy Process, this model has peresented more acceptable results from desertification to IMDPA model that is more near to the realty.}, Keywords = {Desertification, Urbanization and industrial development, IMDPA model, MICD model, Lar city area}, volume = {5}, Number = {2}, pages = {55-66}, publisher = {University of Hormozgan}, url = {http://magazine.hormozgan.ac.ir/article-1-217-en.html}, eprint = {http://magazine.hormozgan.ac.ir/article-1-217-en.pdf}, journal = {Environmental Erosion Research Journal}, issn = {2251-7812}, eissn = {2717-3968}, year = {2015} } @article{ author = {Davoodi, Elham and Shabanian, Nahid and Davoudian, Alirez}, title = {Sedimentology of the of Zayandeh-Rood River alluvial Terraces and the sediment source identification}, abstract ={In this research, three alluvial Terraces that are located in pathway of Zayandeh-Rood River are studied. The river starts from Bakhtiayri Zardkoh mountain and after through Esfahan city ends to Gawkhony lake. Age of alluvial terraces is younger in upstream than downstream and the height level of the terraces decrease relative to current river bed toward the downstream. The terraces were sampled, and then granulometery test and the source identification were performed on the sediments. The results showed that the majority of samples shave poor sorting and different skewness. The conditions probably display the variation in river regime with climate changes during Quaternary period. The source identification has showed that much of sediments are schist fragments from the northern Shahrekord metamorphic complex and limestone. The sediments have originated from different locations in pathway of the river. Some of the limestone fragments have microfossil with Eocene age probably correlated with the Jahrom formation in Zagros Zone. The limestone sediments are been transported to the study area from the formations which are situated before Zayande-Rood dam.}, Keywords = {alluvial Terraces, sedimentology, particle size distribution curve, Zayande-rood River}, volume = {5}, Number = {2}, pages = {68-85}, publisher = {University of Hormozgan}, url = {http://magazine.hormozgan.ac.ir/article-1-193-en.html}, eprint = {http://magazine.hormozgan.ac.ir/article-1-193-en.pdf}, journal = {Environmental Erosion Research Journal}, issn = {2251-7812}, eissn = {2717-3968}, year = {2015} }