Download PDF by Pierre Y. Julien: Erosion and sedimentation

By Pierre Y. Julien

ISBN-10: 0511712944

ISBN-13: 9780511712944

ISBN-10: 051171503X

ISBN-13: 9780511715037

ISBN-10: 0511717180

ISBN-13: 9780511717185

ISBN-10: 0511806043

ISBN-13: 9780511806049

ISBN-10: 0521537371

ISBN-13: 9780521537377

ISBN-10: 0521830389

ISBN-13: 9780521830386

The second one variation of this acclaimed, obtainable textbook brings the topic of sedimentation and erosion up to date, supplying a great primer on either primary thoughts of sediment-transport thought and techniques for functional purposes. The constitution of the 1st version is largely unchanged, yet the entire chapters were up-to-date, with a number of chapters remodeled and elevated considerably. Examples of the recent additions contain the concept that of extra mass, the transformed Einstein process, sediment shipping through dimension fractions, sediment delivery of sediment combos, and new strategies to the Einstein Integrals. Many new examples and workouts were further. Erosion and Sedimentation is a necessary textbook at the subject for college students in civil and environmental engineering and the geosciences, and likewise as a guide for researchers and execs in engineering, the geosciences and the water sciences.

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Erosion and sedimentation - download pdf or read online

The second one variation of this acclaimed, available textbook brings the topic of sedimentation and erosion up to date, supplying a good primer on either basic ideas of sediment-transport concept and techniques for functional functions. The constitution of the 1st version is basically unchanged, yet all of the chapters were up to date, with a number of chapters remodeled and multiplied considerably.

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3 Equations of motion 37 After dividing by X, this gives an equivalent formulation as a function of the total volumetric sediment discharges Qsx = qsx W and Ax = ∀t / X = Wh as the reach-average cross-sectional area. 4) In the case of steady non-uniform one-dimensional flow in the x direction, one can consider that qs = 0 and dCv /dt = 0. 5) This formulation is often referred to as the Exner equation. Notice that it assumes that all the sediment in the water column will deposit within the distance X and qsx is a volumetric unit sediment discharge.

Acceleration components are ax = ∂ vx /∂t = g/2, ay = az = 0. The gravitational acceleration components are gx = gy = 0, and gz = −g. 56 from the vertical. The buoyancy force only equals the Archimedes’ force in hydrostatic fluids. 5 Bernoulli equation The Bernoulli equation represents a particular form of the equations of motion for steady irrotational flow of frictionless fluids. A gravitation potential g = gˆz can be defined with the axis zˆ vertical upward such that the body acceleration components due to gravity are: gx = −∂ g −∂ g −∂ ; gy = ; and gz = ∂x ∂y ∂z g Since g is a constant, the directional acceleration components are g times the cosine between zˆ and the component direction.

6 100 (a) Plot the sediment size distribution; (b) determine d16 , d35 , d50 , d65 , and d84 ; and (c) calculate the gradation coefficients σ g and Gr. 5 Consider energy losses HL in a straight open channel. The energy gradient HL /Xc in a smooth channel with turbulent flow depends upon the mean flow velocity V , the flow depth h, the gravitational acceleration g, the mass density ρ, and the dynamic viscosity μ. Determine the general form of the energy gradient equation from dimensional analysis. 6 Consider a near-bed turbulent velocity profile.

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Erosion and sedimentation by Pierre Y. Julien

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