HYDRAULIC CANAL Russian patent published in 2002 - IPC

FIELD: hydraulic engineering. SUBSTANCE: invention can be used for transportation of water at irrigation and in different water handling facilities. Proposed canal has polygonal section flume with symmetrical slops: upper ones with steepness m₁ = 0,25-15, middle ones with steepness m₂ =1-3 and bottom ones with steepness m₃ = 3-6. Flue is made with relative depths and relative width where B₁ is width of flume at foot of upper slopes, m; h₁ is depth of upper of flume without account of margin of rise of slope crest over level, m; h₂ is depth of middle part of flume, m; h₃ is depth of bottom part of flume, m. Polygonal section provides high efficiency of canal owing to increased flow capacity. EFFECT: reduced cost of building owing to reduced area of lining. 1 tbl, 4 dwg