Environmental Erosion Research
Year:2019 | Volume:8 | Issue:4 (32)|Papers Count:6

1-Introduction: Piping erosion is one of the common water erosions usually occurs in soil with low infiltration and soluble minerals that finally changes landscape. Different factors control its occurrence and development. To predict piping occurrence/hazard through modeling, effective factors should be prioritized and considered as inputs of the model. The present study has performed through field survey for piping erosion across the Iky Aghzly watershed with an area of 105 ha lead to recording of about 102 pipes (≤ 1 pipe per ha). This study aims to detect the locations of piping erosion via the modeling of logistic regression....

1-Introduction: Desertification refers to the land degradation phenomenon and process in arid, semi-arid and dry subhumid areas resulting from various factors including climatic variations and human activities. This phenomenon has faced the environmental and food security with crisis. About 12, 930 ha (16. 5%) of the study region consists of hilly and sandy area. About 9, 022 ha of the area consist of bare lands, clay plain and desert pavement, which shows absolute typical condition of desertification in the study area. Therefore, studying methods that can present optimal alternatives for desert area management is essential in order to avoid investment wasting and increasing the efficiency of controlling, reclamation and reconstruction of natural resources projects. Considering the limitations of the studies, it's essential to assess ways which can give zoning based on logic, active principles and theoretical foundations for the management of desert regions. Therefore, the goal of this study was providing an appropriate model in order to present optimal solutions in the study area. . . .

1-Introduction: Rivers are one of the dynamic landforms of natural landscapes that are subject to changes due to environmental variables and human interactions during different times and locations. Changes in the river, erosion of the bed and river bank are natural processes of alluvial rivers that destroy the surrounding agricultural land and damage human installations around the river. Human activities, such as the degradation of basin vegetation and the uncontrolled harvesting of river water, cause more pressure on the river and the destruction of the plant covered area along the river and the change of the river ecosystem. Therefore, the erosion of bed and bank and channel changes, finally, the vulnerability of the channel, as social and economic issue, often causes irreparable damage to residents and facilities in riverside. Curitit (2014) predicts the erosion and sustainability of the riverbank in Stony Clove Creek in Catskills, using the analysis of the Bank Assessment for Non-point. Source Consequences of Sediment (BANCS). This study showed that the results obtained through the BANCS method may lead to improved management of the future of the Stony Clove Basin. Hosseinzadeh et al. (2005) studied the efficiency of the Rasgen classification system in the rivers of Babol and Talar in the Caspian Sea coastal plain. The results of this study showed that the prediction of the river type using this method can not be substituted as real research on the river and can lead to failure of management plans....

1-Introduction: In order to calculate the erosive power of rainfall, high-resolution precipitation data are necessary for rainfall erosion evaluation. However, collecting the required data on kinetic energy of the rainfall particles and precipitation rates with short-term temporal resolution is a time-intensive task, particularly in developing countries, and the collected data are difficult to process. Rain sensors provide valuable information on the rate and intensity of rainfall, but fail to adequately represent irregular and inconsistent spatial distribution of the precipitation when evaluating the precipitation rate as those perform point measurements of precipitation. Under such circumstances, evaluation of precipitation rate from satellite data provides an alternative approach to the problem, which makes it possible to estimate precipitation rate and its spatial distribution across large areas. All around the world, several research works have been performed to estimate soil erodibility factor using the precipitation product of TRMM sensor, while no research has used such products for erosion and erodibility studies in Iran. Given that a limiting factor for estimating rainfall erosive power across large areas in Iran has been the lack of required data on precipitation intensity or precipitation rate, the present research can provide an approach to address such limitations. This study is aimed at monitoring the precipitation and hence evaluating and monitoring soil erodibility factor using precipitation products of TRMM sensor and comparing the results with those of terrestrial stations...

1-Introduction: Soil erosion, as one of the most important environmental problems in the world, has a devastating effect on all life, natural resources and it's under human management. Considering that one of the important goals in the management of drainage of basins such as Gabric basin is preventing soil erosion, and also one of the important factors when designing dam or sedimentation structures, is estimating sediment production in the drainage basin, the estimation and calculation of the actual sediment deposited in the constructed dams at the basin outlet, and comparing it with the results of the empirical models, is the best method for estimating the sediment yield in the basins lacking sediment station such as Gabric basin. Therefore, if the amount of estimated sediment is closer to its actual value, it will definitely perform better at the time of designing the dam or planning in the basin in terms of cost and observance of technical and economic principles. In this regard, this study aimed at evaluating empirical models of MPSIAC and F. S. M. and direct measurement method for estimating sediment yield and erosion in the Gabric basin....

Introduction: Gully erosion is the most severe type of water erosion, which causes large damage in the watersheds. To determine the risk of this type of erosion, it is necessary to estimate its severity and specify the distribution of the risk of erosion in the watershed. One of the models used to estimate the gully erosion is REGEM model, but accurate estimation of erosion requires adaptation of the model to regional conditions. In this study, from REGEM and Adapted REGEM (AREGEM) models, they were used to estimate the gully erosion severity of Ardebil province. Also, the distribution of the two models' outputs where mapped in the three watershed and compared to the chosen ones of optimal model....