Abstract
In the riverbeds and canals that run on non-cohesive grounds, bedload sediments move in the ridges form. Ridge forms determine the flow rate of bedload sediments, hydraulic resistances, the types and rates of deformations in alluvial channels. The main elements of ridge formations are height, gentle and steep length with corresponding escarpments. The ridge's steep length and this corresponding escarpment change with changes in the flow hydraulic characteristics. With a change in the ridge's steep length and its steep escarpment, the hydraulic resistance of the channel, the flow rate of bedload sediments, the types, and the channel deformation rates change. In the laboratory, a series of experiments with different sediments compositions and diameters were carried out on the hydraulic tray to determine the main elements (total, gentle and steep length, and the ridge height) and the dynamic characteristics of the ridge formations and the flow hydraulic characteristics. Calculation formulas for determining the coefficient of the ridge lower escarpments with and without taking into account the angle of the natural ground escarpment under water and in the dry state, and the dependence of the steepness of the relative ridge on the relative flow velocity, are obtained. The obtained dependencies allow to accurately determine the geometric and dynamic characteristics of bedload ridges and the corresponding hydraulic characteristics that may define the view ridge formations, ridges resistance of the channel, and the flow rate of bedload sediments, and to design sustainable escarpments large channels.
Highlights
In the Republic of Uzbekistan, the riverbed of all large irrigation canals (Large Ferghana canal, Large Namangan canal, Large Andijan canal, Bozsu, Dargom, Amuzang, Tashsaka, Pakhta-arna, Kizketkan, etc.) is composed of various non-cohesive grounds
The ridges steep length and corresponding escarpment change with changes in the flow hydraulic characteristics, which leads to changes in the hydraulic resistances of the channel, flow rate of bedload sediment, the types, and rate of deformation of the channel
According to Hino [17], in the case of fully developed ridges, their spectrum is determined only by the lower escarpment coefficient, and the value of the latter does not depend on the flow hydraulic characteristics
Summary
In the Republic of Uzbekistan, the riverbed of all large irrigation canals (Large Ferghana canal, Large Namangan canal, Large Andijan canal, Bozsu, Dargom, Amuzang, Tashsaka, Pakhta-arna, Kizketkan, etc.) is composed of various non-cohesive grounds. It is assumed that the value of the lower escarpment angle of remains constant for this form of ridges and does not depend on the flow hydraulic characteristics.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call