| 摘要 |
PROBLEM TO BE SOLVED: To provide a water level adjustment device for adjusting a water level by installing the same to a drain port of a paddy field.SOLUTION: Guide grooves 6 and 6 extending in the vertical direction are provided on inner side faces 5 and 5 of both side slab parts 3 and 3 of a catch basin 1; a lower plate 8 and a water level adjustment plate 9 are attached to the guide grooves 6 and 6; the lower end of the lower plate 8 is in contact with a bottom slab part 2 of the catch basin 1; the water level adjustment plate 9 is fixed at a predetermined level from the bottom slab part 2; and on the water level adjustment plate 9, a triangle opening 15 is formed. |
