Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hydraulic resistances of large unlined canals in noncohesive soils
Conclusions 1. The hydraulic resistances of a large unlined canal in noncohesive soils (for conditions of a clarified flow) are determined by the uniqueness of the hydraulic regime during establishment of relative stabilization of all main elements of the flow and channel. 2. The use of the kinematic index x, characterizing the rate of change in velocities vertically and being a function of the hydraulic resistances, as a criterion of the mobility of bed forms makes it possible to estimate the state of stability of dune forms on various stretches of a large irrigation canal running in an earth channel. 3. An arbitrary assignment of the roughness coefficients n is impermissible when determining hydraulic resistances and longitudinal gradients of a large unlined canal with channel-forming elements. The hydraulic gradients providing longitudinal stability of a straight channel can be predicted both by the traditional method (in terms of n) but with consideration of the regular variability of n and on the basis of the established relationship between hydraulic resistances and the channel shape parameter.
Hydraulic resistances of large unlined canals in noncohesive soils
Conclusions 1. The hydraulic resistances of a large unlined canal in noncohesive soils (for conditions of a clarified flow) are determined by the uniqueness of the hydraulic regime during establishment of relative stabilization of all main elements of the flow and channel. 2. The use of the kinematic index x, characterizing the rate of change in velocities vertically and being a function of the hydraulic resistances, as a criterion of the mobility of bed forms makes it possible to estimate the state of stability of dune forms on various stretches of a large irrigation canal running in an earth channel. 3. An arbitrary assignment of the roughness coefficients n is impermissible when determining hydraulic resistances and longitudinal gradients of a large unlined canal with channel-forming elements. The hydraulic gradients providing longitudinal stability of a straight channel can be predicted both by the traditional method (in terms of n) but with consideration of the regular variability of n and on the basis of the established relationship between hydraulic resistances and the channel shape parameter.
Hydraulic resistances of large unlined canals in noncohesive soils
Altunin, V. S. (Autor:in) / Larionova, L. V. (Autor:in)
Hydrotechnical Construction ; 21 ; 466-470
01.08.1987
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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