AGRICULTURAL WATER SUPPLY/DRAINAGE DEVICE FOR TERRACE RICE PADDY

摘要

PROBLEM TO BE SOLVED: To inexpensively provide an agricultural water supply/drainage device for terrace paddy capable of stably supplying the agricultural water over the whole terrace paddy, keeping a water level of the field constant while using a little amount of the water and restraining e.g. an agrochemical from outflowing and advantageous in construction work. SOLUTION: This water supply/drainage device 20 comprises a water supply/ drainage reservoir 21 with a waterspout 22 communicating with a farming area 12b, wherein the reservoir comprises a water inflow section 23 connecting to a waterway for supply/drainage 13 in a farming area of the upper terrace via a water pipe 31 and a water outflow section 24 connecting to the waterway for supply/drainage 13 via a drainage pipe 32, and wherein the water inflow section 23 is provided with a water supply valve 33 controlling water supply and the water outflow section 24 is equipped with a water level controlling weir 34 adjustable in height and having an opening in the upper section of the reservoir 21.