نتایج جستجو برای: severe erosion of near lands
تعداد نتایج: 21215634 فیلتر نتایج به سال:
The electro discharge machining (EDM), one of the methods used in the machining industry and a non-traditional manufacturing method, the electro erosion process does not depend on the hardness of material and offers a way to process materials of very complex geometry with very fine and high precision by using cheap electrode materials, which make it a preferred method. In this study, effect of ...
This study examined the soil cover and state of natural grass stand saline erosion-prone lands in valley gully system Sukhi Yaly River. Low-productive are located on slopes bottoms gullies, micro-depressions lowland floodplain meadows. Plant groups associated with such soils characterised by low species diversity a lack valuable for fodder. The article presents results research improvement low-...
Scour around structures in the river is the most destructivr factor of these structures. Therefore, different methods have been studied to reduce it. A creation slot is one of these methods in the suitable position that can be modified to control the flow pattern scour. In this study, the effects of using two parallel chord rectangular slots in the single spur dike with the opening of the eff...
Analysis of long-term land use and cover (LULC) changes requires up-to-date remotely sensed data to assess their effects on erosion. This is a particularly important assessment for regions with semi-arid landscapes where soils tend be scarce proper management necessitates matching LULC local conditions achieve sustainable use. study evaluates the impact erosion using Landsat satellite imagery R...
Accurate estimation of soil erosion due to water is very important in several environmental contexts, such as the assessment of potential soil loss from cultivated lands and the evaluation of the loss of water storage capacity in reservoirs due to sediment deposition. Several studies have been carried out to build models suitable to quantify the results of erosion processes. These models, calib...
BACKGROUND This study aimed to assess the dental caries and erosion status of 12-year-old Hong Kong children and study the determinants of dental caries and dental erosion of these children. METHODS The survey was performed from 2011 to 2012 with ethics approval. Stratified random sampling was adopted to select 12-year-old children in 7 primary schools in Hong Kong. The participating parents ...
plagiarism in esl/efl learning contexts has been established as a dynamic and multi-layered phenomenon and has become a topic engaging many researchers in a heated debate in recent years. comparisons of student-generated texts with their source texts have shown that students rely on source texts in their writings and copying is a major strategy used by both l1 and l2 writers. in our country a...
1- INTRODUCTION Soil as one of the most important inputs in agricultural production process plays an important role in the quality of production operation, food security and sustainable development. On the other hand, soil erosion as one of the environmental agriculture issues has been intensified with increasing population and transforming to intensive forms of agriculture in recent years. Mi...
Potter, K. N., Williams, J. R., Larney, F. J. and Bullock, M. S. 1998. Evaluation of EPIC’s wind erosion submodel using data from southern Alberta. Can. J. Soil Sci. 78: 485–492. Wind erosion models have been used to assess policy impacts on soil erosion, but validation of models has been difficult until recently. We evaluated the Environmental Policy Integrated Climate (EPIC) wind erosion subm...
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