2024-03-29T12:28:47+03:30 http://magazine.hormozgan.ac.ir/browse.php?mag_id=3&slc_lang=fa&sid=1
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Environmental Erosion Research Journal E.E.R. 2251-7812 2717-3968 10.52547/jeer 2012 1 4 The Periodic Changes of East Strait of Hormuz shore line by using of Remote Sensing myamani@ut.ac.ir saeed1364@yahoo.com.Rahimi Goodarzi_1900@yahoo.com One of the sensitive systems in geomorphology is coastal systems in which the change in them is fast due to the collision of two dynamic environments of sea and land.Because Coastal lines can record evidence of geomorphological alterations. Due to several reasons like environment changes, global warming, issues regarding human activities and etc. studies and quantitative measurements from periodical changes can have beneficial effect in environmental management of shores.Remotely sensed data and satellite images periodically are considered as a reliable and concise source for investigation and interpretation of coastal line and also as quantitative measurements. In this study we applied the TM-5 satellite images of 1988 and 2010, in a 22-years schedule to monitor the costal changes in the western of Hormoz, based on maximum likelihood method and then with using quantitative measurements, coastal line changes were analyzed according to pixel points, percentage of changes and changed area amount. Additionally, changes trend in width and coastal line were investigated for two years. To evaluate it in a wider spectrum, four sectional sampling were studied. The result of this study revealed that in 22 years this area have undergone considerable coastal line changes, so that such changes reach to 2.8 kilometers in some part, which may represent the fact that hot line of water in 1988 has had more progression toward beach compared to the 2010 data. Furthermore, considering coastal line changes and 2010∕ 1988 ratio, the level of changed area is 29/320/200 m2, and percentage of changes, 5/6%, of coastal line which was under investigation has been prone to periodical changes. Coastal zone East Coastal plain of Hormuz Strait Erosion. 2012 3 01 7 21 http://magazine.hormozgan.ac.ir/article-1-76-en.pdf
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Environmental Erosion Research Journal E.E.R. 2251-7812 2717-3968 10.52547/jeer 2012 1 4 Effect of different Land use on surface water quality (Case study: watershed Siahrood Ghaemshahr) hrmoradi@modares.ac.ir n.taghavi@yahoo.com nbahramifar@gmail.com The Rivers most common sources of drinking water supply, agriculture and industry are considered as due to the different regions of admission and can pass and in direct contact with with its surroundings have many quality swings. The other hand, excessive exploitation of soil, continuous use of surface and underground water resources and sustainable use of agricultural chemicals (fertilizers and pesticides). Significant negative effects have on the environment. Human factors such as various land use changes is important factor to water resources has being physical, chemical and biological changes. These changes were generally negative and the exploitation of water resources are severely limited. This paper investigates the effect of different land uses on the quality of surface water resources are discussed. Water Quality Land use Nitrate Siahrud watershed 2012 3 01 21 31 http://magazine.hormozgan.ac.ir/article-1-77-en.pdf
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Environmental Erosion Research Journal E.E.R. 2251-7812 2717-3968 10.52547/jeer 2012 1 4 Evaluation of soil erosion and sediment yield estimation various empirical model by observation values (Case study: Babolroud watershed, Mazandaran Provienc) khabat.khosravi@gmail.com Attasafari@yahoo.com roshanabah@yahoo.com nezam.mahmoudi@gmail.com In this study where done in Babolroud basin, seven models include MPSIAC, EPM, Fournier, Douglas, Kirkby, Geomorphology and Hydrophysical was evaluated to determine the best model  for estimation of soil erosion and sediment yield. These models have not been compared together as integrated in the previous researches. The zoning soil erosion intensity map was prepared for each model using GIS. The estimated sediment yield compared with the observed data (43 years data of Ghorantalar station) by statistical evaluation criteria;#39s such as relative and absolute difference and correlation coefficient. Results showed that MPSIAC model in Lowland and Azar sub-basins, Geomorphology model in Karsang and Esklim sub-basins and EPM model in Babolak sub-basin have more reasonable precision and efficiency than other models. Finally, with investigation of the observed sediment data in Babolroud basin, MPSIAC model with the relative difference of 7.932% (76659.896 ton/y) and correlation coefficient of 0.86 was most appropriate model to estimate soil erosion rate and sediment yield in the Babolroud basin. Erosion and sediment Empirical models Observed values Relative difference Babolroud watershed 2012 3 01 32 52 http://magazine.hormozgan.ac.ir/article-1-78-en.pdf
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Environmental Erosion Research Journal E.E.R. 2251-7812 2717-3968 10.52547/jeer 2012 1 4 Compare the MPSIAC and EPM Models for Estimating Erosion and Sediment in poorahmadi catchment Moradi2763@yahoo.com diba.ghonchepour@yahoo.com Ahmad_nohegar@yahoo.com vafa2_m@yahoo.com to estimating erosion and sediment in the Poorahmadi watershed basin, MPSIAC and EPM models was used and compared.  Part of Required data about natural characteristics of studing watershed basin provided from comprehensive studies of Watershed Basin and the other part prepared through digital image processing and preparing required maps  using RS and GIS joint capabilities.  With calculating the required factors, amount of erosion calculated in MPSIAC and EPM models. in the MPSIAC model, special erosion and special sediment respectively calculated1903/72 (M³/KM²/y) and 616/03(M³/KM²/y). However, the rate of special erosion and special sediment  in the EPM  model was estimated respectively 1093/5 (M³/KM²/y) and 1015/8 (M³/KM²/y). Results showed that in some sub basins MPSIAC and EPM  models have good coincidence, but in areas with high erosion EPM Model has less certainty than MPSIAC model.  Remote Sensing EPM Model MPSIAC Model Poorahmadi Catchment Geogaphic Information System. 2012 3 01 53 67 http://magazine.hormozgan.ac.ir/article-1-79-en.pdf
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Environmental Erosion Research Journal E.E.R. 2251-7812 2717-3968 10.52547/jeer 2012 1 4 The Response of Fluvial Systems to Large Flood Events m.jahadi@pnu.ac.ir Srhosszadeh@um.ac.ir In the summer of 2001, an intense thunderstorm in southeastern Caspian Sea triggered a catastrophic flood in the Madarsoo basin . Use of methods including high-resolution aerial photographs and satellite images interpretation, multi-date mapping, hydraulic calculations and field observations made possible the documentation of the geomorphic impacts on the Madarsoo River and its tributaries. Geomorphologic effects of this catastrophic flooding included: trees up to 2m in diameter were scoured from the main river channels and locally as much as 80% of trees crown cover was removed from riparian zones. The scour of trees exposed the underlying flood plain to macro turbulent scour, leading to extensive removed of flood plain sediments that had accumulated over centuries. Other hydro-geomorphic impacts of this flood have been drainage network modifications create new alluvial fans, new meandering pattern and gully development that all of them have been documented by authors. Subsequent to the mentioned flood two other extreme floods also affected the basin in the August of 2002 and 2005. In addition to causing further landform modifications, It wiped out the infrastructure which was reconstructed posterior to 2001. All three floods were in the same conditions on the basis of their time, climatic and triggering characteristics. The peak flood was estimated 700m3s-1 in August 2002, and also 1060 m3s-1 August 2005. the occurrences of the two above mentioned catastrophic floods and related processes were result of triggering variables, forming a new dynamic environments by the main event (August 2001 flood), Which prolongs the required time for recovery of stream channels. Geomorphic instabilities lead to consecutive Crises in this new environment. This Condition accelerates geomorphic hazards in combination with the effects of recent climatic Large flood events geomorphic impacts fluvial system responses geomorphic instability Madarsoo River 2012 3 01 68 85 http://magazine.hormozgan.ac.ir/article-1-80-en.pdf
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Environmental Erosion Research Journal E.E.R. 2251-7812 2717-3968 10.52547/jeer 2012 1 4 Application of Geomorphic River Recovery in river management, case study, Northen Alborz, Lavij Rud catchment re_esmaili@yahoo.com Rivers have a complicated and various condition in the diverse environment, and various science such as Hydrology, geomorphology, hydraulic, ecology and engineering have it been discussed. River geomorphology with studying of river process and landforms, examination of river landscape evolution, can be playing an important role in identifying of river channel character and behavior. To order that river has been examined precisely and damage to property and river engineering designed declined.In this study based on River Style framework, first type of river style is determined. Then, with three degree of freedom channel morphology, planform and river bed character, capacity for adjustment, and relevant geoindicators for each degree of freedom for each river style are determined. Next, river evolution interprets using with ergodic reason to assess whether irreversible geomorphic change has occurred and geomorphic recovery potential of each reach is determined by assessing the connectivity of reaches and interpreting limiting factors and pressures.In Lavij rud catchment eight river style identified. More steep headwaters have intact condition and gorges, low sinuosity planform with discontinuous floodplain and high energy with gravel bed river styles have high river recovery potential. Cut-fill, bedrock controlled with discontinuous floodplain and confined with occasional pocket floodplain river styles have moderate river recovery potential. Confined with slump bank river style have a low river recovery potential and their condition are degraded. Results show that river styles in this catchment also have respectively 65, 28 and 7 percent high, moderate and low river recovery potential. Management prioritization each river style proposed to notice river geomorphic condition and river recovery potential. River style geomorphic condition potential of river recovery ergodic geoindicator Lavij Rud river management fluvial geomorphology 2012 3 01 68 107 http://magazine.hormozgan.ac.ir/article-1-81-en.pdf
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Environmental Erosion Research Journal E.E.R. 2251-7812 2717-3968 10.52547/jeer 2012 1 4 Investigation on Environmental Factors Influencing Water Erosion (case study:Taleghan basin, Varkesh subbasin) nkamali@ut.ac.ir ahmadi@ut.ac.ir asadeghipur@alumin.ut.ac.ir paria.kamali@gmail.com   The purpose of current study is to investigate the effects of some of environmental factors on erosion value, to find the most important governing factors and the relation between erosion of working units and environmental factors (soil characteristics, slope, aspect, elevation, lithology, geomorphology faces and vegetation cover percentage). Working units map was prepared using geomorphology method. This map was derived by overlaying slop, aspect, elevation, lithology and geomorphology faces maps. In order to study plant cover random-systematic sampling in each working unit was conducted in 10 plots. Regarding the species type and distribution the area of each plot was determined based on the minimal area method. Canopy cover of species was determined in each plot. Furthermore, 5 profiles were sampled within the working units to study soil characteristics in 0-50 cm depth. Subsequently, the texture, percent of lime, organic matter, gravel, pH and EC were measured. Erosion value was determined in each working unit using E.P.M. method. Statistical analysis was done using the Principal Components Analysis (PCA) through PC-ORD4 software program. The results showed that among environmental factors, vegetation cover, lime percentage, face and organic matter as the first set of factors determine the change in erosion value by 33.99% while the second set of factors, including loam, stone resistance and clay percentage play contributes to the change by 17.295%. These two sets of factors altogether explain 51.288% of erosion value variation in Varkesh basin.  Varkesh basin working unit E.P.M soil properties Principal Components Analysis 2012 3 01 108 123 http://magazine.hormozgan.ac.ir/article-1-82-en.pdf