Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
Online ISSN : 1884-7242
Print ISSN : 1882-2789
ISSN-L : 1882-2789
Study of Trial Performance Design and Function Countermeasures for Irrigation Canals with Deteriorated Hydraulic Performance
Koichi MIHARUYoshikazu TANAKAAkie MUKAIHiroyuki TARUYATatsuo NAKA
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2008 Volume 2008 Issue 258 Pages 529-534,a2

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Abstract

To perform function maintenance of irrigation canals, it is necessary and indispensable to execute overall function diagnosis and performance design for hydraulics and water serviceability in addition to the former structural function, and also necessary to set function maintenance measures. This report takes up the problem of declined hydraulic performance caused by explosively increased algae in irrigation canals in a paddy field irrigation district. The area where water overflows from the sidewall of an irrigation canal when algae grows thickly in large quantities is hypothesized by a hydraulic performance check method using non-uniform flow calculation. Therefore, 5 schemes for the overflow stream measures have been prepared. The optimal scheme is selected based on the calculation of life-cycle cost taking maintenance into consideration.

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