摘要:

The test program and its scope is described. Analyses of the experimental data produced equations describing the scour hole geometry that can be used for the design of cantilevered pipe spillway plunge pool energy dissipators. Background for these analyses is presented in Part I [3]. The representativeness of these criteria and equations was evaluated and are considered to be satisfactory.

ISSN:0022-1686    

DOI:10.1080/00221688809499190

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Flow into and through a reservoir with a sloping bottom is modeled in two dimensions. The inflow is denser than the reservoir water and plunges below the surface to form a density current. The unsteady momentum and continuity equations are formulated in cylindrical coordinates. The standardk-ε turbulence model is used with an extension to include production or destruction of turbulent kinetic energy by buoyancy forces. The equations are solved numerically. Simulations were carried out for a range of flow conditions and bottom slopes. The numerically generated plunge depths follow the expected basic trend, but the actual plunge depth values are about 20 percent greater than experimentally determined values. Initial entrainment values at plunging were also computed and found to be of the same order of magnitude as measured values.

ISSN:0022-1686    

DOI:10.1080/00221688809499191

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The overall phenomenon of a hydraulic jump in prismatic, rectangular channels, whose bottom slope is considerable in the upstream and horizontal in the downstream reach is investigated. Based on detailed observations, expressions are derived for the sequent depths, the jump efficiency, the length characteristics and the horizontal bottom force component.

ISSN:0022-1686    

DOI:10.1080/00221688809499192

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Two methods for the field evaluation of vegetative stiffness are presented and compared. These methods enable the determination of the flow capacity of a vegetative channel. The dimensional analysis for flow in vegetated channels is reviewed and updated.

ISSN:0022-1686    

DOI:10.1080/00221688809499193

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The effect of bed roughness and sediment load on energy dissipation under wave action has been analysed with the aid of unidirectional flow relationships and laboratory data. An expression is proposed for estimation of the equivalent roughness height. The paper also raises questions which need further study.

ISSN:0022-1686    

DOI:10.1080/00221688809499194

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Those semi-empirical exponential equations which can describe subsidence of flood peak discharges in channels during overbank flow periods are developed by using dimensional analysis to analyze the numerical results computed from various flood routing techniques based on unsteady free surface flow equations. The subsidence is expressed as a function of eight dimensionless parameters related to the geometry and Manning roughness coefficients of main channel and overbank sections, bed slopes, duration of flood wave, rising time and recession time of overbank flow hydrograph. Two different shapes of inflow flood hydrographs are considered.

ISSN:0022-1686    

DOI:10.1080/00221688809499195

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Fluvial Processes In River Engineeringby Howard H. Chang Published by John Wiley & Sons, New York, Chichester, Brisbane, Toronto, Singapore, 432 pages, 1988, hardcover. Price £ 45.

ISSN:0022-1686    

DOI:10.1080/00221688809499196

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688809499189

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor