نتایج جستجو برای: erosion and sedimentation
تعداد نتایج: 16833835 فیلتر نتایج به سال:
Dam removal is one of the methods of restoring the river ecosystem. In the present study, the removal of the Voshmgir Dam on the Gorganrud River, Iran, was considered, because of the high volume of sediment deposition in the reservoir and the loss of its useful life. Three scenarios were selected for the removal of the dam: 1- complete removal; 2- stepped removal of the spillway; and 3- removal...
................................................................................................................ XI GENERAL INTRODUCTION .....................................................................................3 1.1 PROBLEM STATEMENT.......................................................................................3 1.2 SIGNIFICANCE OF SOIL EROSION AND SEDIMENTATION IN THE ANDEA...
................................................................................................................ XI GENERAL INTRODUCTION .....................................................................................3 1.1 PROBLEM STATEMENT.......................................................................................3 1.2 SIGNIFICANCE OF SOIL EROSION AND SEDIMENTATION IN THE ANDEA...
Anthropogenic sedimentation has various detrimental effects in many freshwater ecosystems. Sedimentation is most often caused by erosion following deforestation or development of pristine areas that expose the soil surface to precipitation and surface runoff. Accumulation of eroded sediments in the benthic zone of aquatic ecosystems has a variety of adverse effects on the fauna (Cohen et al. 19...
Investigating the features and flow behavior and related component is one of the complex phenomena that make using of software inevitable. The rivers carry sediment content along with water which is created by erosion of riverbed sediment and erosion caused by rainfall or surface runoff flowing over the catchment area. If the action of river dewatering occurs, the entry of sediment into the int...
The influence of sedimentation rates on biogeochemistry of riparian forests was studied near ephemeral streams at Fort Benning, GA. Upper reaches of seven ephemeral streams had received varying rates of sedimentation stemming from erosion along unpaved roadways at the military installation. Two reference catchments were also included in the study. Decomposition of foliar litter, microbial C and...
Extended abstract 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 d...
The increasing size and severity of wildfires in the western United States has caused a corresponding increase in post-fire emergency erosion control activities. Hillslope treatments, such as broadcast seeding, mulching and installed barriers, are applied to reduce runoff and erosion, as well as downslope sedimentation. However, there are few data to determine if these post-fire treatments are ...
Associate Professor of Geomorphology, Department of Geography, California State University, Northridge. Abstract: Dividing exogenic processes into constituents enables one to distinguish between denudational and depositional environments. This distinction leads to the recognition that the chaparral assemblage occupies a zone which is predominantly denudational. A qualitative assessment of sane ...
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