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Author: Gostishchev D. P. Tishchenko A.I. Gostishchev V. D.

DETERMINATION OF HEAD LOSSES OF WASTE WATER FLOW IN DIVERSION IRRIGATION NETWORK ELEMENTS

Topics: 05.23.16 Hydraulics and Engineering Hydrology (archive until 2018)

Abstract:

The purpose of this study is to determine the head losses of water flow of wastewater in the elements of an open diversion irrigation network. The water loss for filtration, evaporation, hydraulic resistance, etc. in the system is taken into account. Diversion irrigation systems are used in foothill and mountainous areas with large topography changes where the water flow having kinetic energy acquires potential energy in the sharp changes of slope. When the water flow moves along the diversion irrigation canals its head drops out. There are two types of head loss during the water flow movement: head loss by length and local head loss. As a result, the water pressure entering the sprinklers hydrants can be significantly less than the pressure needed for high-quality irrigation of the irrigated area. As in any reclamation system, hydraulic structures of various designs are used on diversion canals. These structures perform one or another role in the transformation of the kinetic energy of water flow into mechanical, electrical energy, or both. To achieve this goal, the theoretical problems of classical mechanics and hydraulics have been applied. The methods of investigation are based on theoretical materials with the derivation of calculated dependences for determining the head losses of water flow. To derive the kinetic and potential energy of the water flow, the basic law of dynamics of classical mechanics is used. The final result of the principle of energy is given in the article. After small mathematical transformations, this theorem is reduced to the Bernoulli equation for a section of the water flow separated by sections 1 – 1 and 2 – 2 (length L) with its smoothly changing motion. The novelty of the article is the development of a methodology (algorithm) for calculating the head losses of water flow and a flowchart for calculating (with the help of a computer) the head (energy) losses of water flow for a single canal of diversion network.
Key words: diversion irrigation network, passing of snowmelt and shower wastewater, head losses of the water flow along the length of the water course, local losses, work, efficiency coefficient.
DOI: 10.31774/2222-1816-2018-4-214-231

For citas:
D. . Gostishchev, A. I. Tishchenko, V. D. Gostishchev. DETERMINATION OF HEAD LOSSES OF WASTE WATER FLOW IN DIVERSION IRRIGATION NETWORK ELEMENTS. Scientific Journal of Russian Scientific Research Institute of Land Improvement Problems. 2018. No 4. P. 214-231 DOI:https://doi.org/10.31774/2222-1816-2018-4-214-231

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