| 摘要 |
PROBLEM TO BE SOLVED: To basically improve the structure of an intake device so that a maintenance cost of the intake device taking water for drinking, industry, raising or the like from a river can be reduced and, at the same time, that the inflow of foreign matters such as gravel, sand, fallen leaves, wooden pieces, etc., from an intake can be surely prevented. SOLUTION: A water holding channel 11 parallel with a sheathing levee 10 is provided to a wall side on the downstream side of the sheathing levee 10. Then, the upper part of the water holding channel 11 is covered with a filter 12 inclined to the downstream side at a gradient of 5-45 deg. from the upper end of the sheathing levee, a porous air pipe 15 is provided to the inside of the water holding channel 11 along the longitudinal direction of the water holding channel 11, it is connected to a pressure air source through a valve, and an intake pipe 18 is provided to the water holding levee 11.
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