Hydraulic resistances experimental and field studies of supply canals and pumping stations structures

Abstract

Currently, many authors have studied the uniform axisymmetric pressure head laminar and turbulent movement of water in hydraulic smooth and rough (with uniform roughness) pipes of circular cross-section. The results obtained in the study of a plane-parallel turbulent flow in pressure canals allows here only to outline the structure of the corresponding dependencies and to clarify the simplest case of unpressurized fluid movement, when this movement can also be reduced to plane-parallel or, in other words, to movement in a canal of infinitely large width with a flat bottom. In all other cases, the only way to solve the problem is an experiment. The construction of numerous free-flow watercourses and machine canals of pumping stations requires scientifically based calculation methods.

Calculation of planned flows taking into account deformations of bottom sediments in a dam-free water intake

“…During the main flood period in previous years, their values reached 28...30 kg/m 3 against 15...20 kg/m 3 (observed over a long-term period). Cape Pulizindan, created in natural conditions, plays the role of a deaf stable spur [15][16][17]. Here, the main flow, depending on the current and approach, is reflected at an angle and directed to the opposite erosional bank, where the main stream forms a stall current causing erosion of the coastal area of the Kyzylaak Village.…”

Recommendations for the assessment and forecast of shore deformations in the average flow of the Amudarya river

“…In these cases, calculations must be made taking into account high floods on the rivers. Such accounting is achieved by replacing in formula (8) the average long-term value of the flood peak ℎ 1 ̅̅̅ by the maximum observed level ℎ 𝑚𝑎𝑥 [15][16][17][18][19]. Then we obtain a formula for determining the magnitude of the retreat of the bank edge with a short-term forecast Х 𝑘.𝑟 , m. (10) The parameter can be found by the formula:…”