A measurement control device (100) specifies a predicted peak value of a water level based on a prediction result for a change in the water level. The measurement control device (100) calculates a reference value of the water level at which the measurement of the water level is started, according to the specified predicted peak value. The measurement control device (100) specifies a predicted timing at which the water level is predicted to reach the calculated reference value, based on the prediction result for a change in the water level. The measurement control device (100) controls a start timing of the water level measurement by a sensor device (101) based on the specified predicted timing.
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