Lec13 - University of California, Berkeley Civil...

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University of California, Berkeley Professor Ken Johnson Civil Engineering 70 Engineering Geology Civil Engineering 70 Lecture 13 10/9/07 Flow of Fluids o Flow regime can be Laminar or Turbulent Laminar Very uniformly flowing in one direction Turbulent A lot of mixing occur o Factors governing flow regime include: Velocity of flow Geometry of the channel Viscosity of the flowing fluid Affected by the sediments entrained in the water Sediment Movement o Rivers and streams are major agents for erosion o Sediments are carried in both the laminar and turbulent flow regimes o Suspended Load include the sediments particles carried in suspension o Bed Load includes the sediment moving (sliding and rolling) along the bottom of the channel o Competence of a stream ir river characterizes the ability of the stream to carry a certain size of particles o Capacity of a stream is a measurement of the total sediment load transported o Clay and silt sized particles are typically transported as suspended load
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Lec13 - University of California, Berkeley Civil...

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