Systems and methods for paddy farm water level measurement

A method for measuring water levels, comprising:

• positioning a portable ultrasonic measurement system on a top portion of a water level tube, the water level tube being at least partially inserted into soil and at least partially filled with water;
• transmitting, by an ultrasonic sensor of the portable ultrasonic measurement system, ultrasonic signals toward a water surface within the water level tube;
• receiving, by the ultrasonic sensor, reflected signals from the water surface;
• calculating, by a controller of the portable ultrasonic measurement system, a water level within the water level tube based on a time of flight of the ultrasonic signals and the reflected signals;
• and
• obtaining, by a GPS module of the portable ultrasonic measurement system, geographic coordinates associated with the water level measurement.

A portable ultrasonic measurement system, comprising:

• a body comprising a weatherproof enclosure housing a controller, data storage, a power source, and a network interface;
• a coupling portion extending from the body, the coupling portion comprising:
• a rigid wall defining a cavity configured to receive a top portion of a water level tube;
• a plurality of spacer blocks coupled to an inner surface of the rigid wall and configured to center the water level tube within the cavity;
• and
• a plurality of tube stops extending from the inner surface and configured to engage a top surface of the water level tube to provide a known distance between the top of the water level tube and an ultrasonic sensor;
• the ultrasonic sensor coupled to a top wall of the coupling portion, the ultrasonic sensor configured to transmit ultrasonic signals and receive reflected signals from a water surface within the water level tube;
• and
• a GPS module configured to obtain geographic coordinates,
• wherein the controller is configured to calculate a water level based on a time of flight of the ultrasonic signals and the reflected signals and to associate the geographic coordinates with the calculated water level.