Water level management system and methods

Abstract

The invention of the water level management system includes: a first data collector (1QA) to collect the first data related to weather in the target rice field P; a second data collector (10B) to collect the second data indicating the water level in the rice field I'; a first processor (11) to calculate the rice growth index (DV1), based on the first data, and obtain the ideal water level in the rice field p according to the calculated growth index; The second processor (12) sets the target water levels in the rice field p, based on the obtained ideal water level; and the water level control unit (13) generates, based on the second data, a water level control signal to order water supply or drainage according to the set target water level, and sends a signal to the water supply device (3) to supply water to the rice field p, or the drainage device (4) to drain water. The first data set includes the air temperature in or around the rice paddy field p, or the water temperature in the rice paddy field Ps, or both the air temperature and the time of day in the rice paddy field p.