Irrigation system and control device

A first water supply valve controls the pressure of a water supply from one end side of a distribution tube (136) and controls the amount of irrigation from through holes in the distribution tube. A second water supply valve controls the pressure of a water supply from the other end side of the distribution tube (136) and controls the amount of irrigation from the through holes in the distribution tube. A first abnormality sensor detects an abnormal state in the water supply from the one end side of the distribution tube. A second abnormality sensor detects an abnormal state in the water supply from the other end side of the distribution tube. A control devices controls the valve opening degree of the first water supply valve and the second water supply valve when an abnormal state is detected by the first abnormality sensor or the second abnormality sensor. The control device closes the water supply valve controlling the water supply from the side on which the abnormal state was detected and opens the water supply valve controlling the water supply from the side on which the abnormal state was not detected.