Experimental Study of the Shear Stress Effect on the Deposition Process of the Cohesive Sediments
Journal Title: Journal of River Engineering - Year 2014, Vol 2, Issue 4
Abstract
Describing the behavior of cohesive sediments is so complicated; and the flocculation of these sediments increases the amount of sedimentation.Cohesive sediments are characterized as a mixture of predominantly clay and siltsizedfractions of clay-type minerals but may also contain a range of organic compounds.This study has been done in a circular flume located atShahrekord University’s hydraulic laboratory.The experiments were conducted for three initial concentration levels and five different shear stresses and in the experiments the flowvelocity and shear stress were measured by the Acoustic Doppler Velocimeter(ADV). The experiments have been continued for 4 hours. The results showed that during the time tests, the concentration of the suspended sediments reached to a constant equilibrium value only for experiments with higher shear stress. It was also observed that reaching to equilibrium concentration takes less time in larger stresses. This showed that the flow’s shear stress may be had an important role in the flocculation process.
Authors and Affiliations
Milad Khastar Borujeni - Hossein Samadi Borujeni
Keywords
Related Articles
- EP ID EP32973
- DOI -
- Views 356
- Downloads 0
Estimation of possible Flooding Risks for Enhancement in Flood Resilience in River Valleys
Flood is one of the major natural hazards which could cause great disaster. In order to enhance the flood resilience, the proper estimation of flood risks mainly possible loss of life is very much important. Catastrop...
Area Exploration Takht-e Soleyman Based on Metallic Potentials and Geochemistry
The explosion area of Takht-e Soleyman is located in the heights of 2811 meters in west azerbaijan province mountains. This site is situated between Takht-e Soleyman and takab villages at about 45 kilometers of the no...
Pressure Hydraulic Sediment Flushing on short dams
Several methods have been proposed to control sedimentation process. These may include catchment’s management, flushing, sluicing, density current venting and dredging. Flushing is used to erode previously deposited sedi...
Comparative Study of Canal Design
India is basically an agrarian country and crop-water is supplied through the system of canals from either dams or distribution chambers. Conventionally, canals are designed, constructed & maintained by the Water Reso...
Evaluating the Suspended Sediment of Mahabad Dam Using Statistical Methods
Dam construction is one of the methods for storing surface water. Estimating the service life and economic efficiency of dam is one of the most important cases in estimating the design of it. The most important proble...