Underdrainage Masuichi and paddy water level adjustment system for paddy

摘要

To provide a paddy water level regulating system which can adjust the water level by simultaneously draining the ground and surface water. The invention relates to a paddy field for underdrainage Masuichi the external drain pipe 14 is connected to drain the underdrainage tube 11A and the paddy fields of water that was buried in the ground outside the paddy field, bottom of the bottom in a plane substantially square and 2, with the top 3 under 2 and the plane is substantially the same shape provided in the upper portion of the lower 2, and Masumoto body 1 having a, provided on the side plate 5F under 2 underdrainage and underdrainage port 12 that connects the pipe 11A, the external drainage port 15 for connecting an external drain pipe 14 provided on the other side plate 5B under 2, upper opening provided in the side plate 6F above 3 , and an opening 21 on which is provided so as to face the surface water of rice paddies, and the weir plate for water level regulation provided in the upper opening 21, and the vertical direction of the water level to be connected to the underdrain pipe 11A in Masumoto body within 1 I and an adjustment for the pipe 43. .BACKGROUND