This early flood alerts system has been successfully
researched and well-designed as expected. It will continue to
be refined so that it has the reliability and small error rate.
This system can be put at various flood prone spots, because
the water boundaries can be set via SMS. It is designed to send
SMS only to two clients whose numbers have been registered
and will send a warning SMS three times for each warning for
every client. Early flood alerts system will also automatically
notify the client if the flood is being in a safe condition. Other
advantages of this system is the system can send the water
level to anyone who send the request for water elevation data
and this system worked for 24 hours to take measurements.
From the experiments conducted, ultrasonic sensor HCSR04
as the water level gauge can work well when compared
to the ping ultrasonic sensor. Ultrasonic HC-SR04 can
measure the distance of 4 meters, but if it placed inside the
PVC pipe, the ideal for measuring distance is 3 meters with a
minimum PVC diameter of 8 inch. On the other side, the ping
sensor can not measure properly and make reading errors. The
success of the process of sending SMS warning depends on
the signal and the type of provider used.
The system can work with supply voltages between 4V -
4.5 V with a current of 0.025 Ampere on the condition of not
doing communication. Ultrasonic sensors can measure the
water level with a maximum distance of 4.32 meters with an
average error of 3.74%. Solar Panel is able to provide supply
to the battery and the battery - under ideal conditions - can
operate the system from fully charged to empty condition for 5
to 6 days.