Vagos vingiuotumo įtaka tėkmės hidrauliniam režimui

Abstract

Uncontrolled naturalization of trained river leads to increment of bed surface roughness, transformation of cross section and longitudinal river profile in plane. Influence of bed roughness and profile curvature to conveyance was investigated in four hydraulic distorted scale models of trained river. Hydraulic resistance to water flow of rough and smooth, straight and curved river bed was compared. Influence of Reinolds and Froude numbers to roughness coefficient and minor loss coefficient of trained river bed was investigated. It was determined, that slight curvature of trained river bed is acceptable and even desirable. To avoid long lasting meandering of trained river bed control of naturalization process must be carried on.