DESIGN AND IMPLEMENTATION OF A REAL-TIME WATER QUALITY MONITORING SYSTEM FOR BRACKISH WATER CAGE CULTURE

Abstract

This paper presents the designing and implementation for an automatic real time measurement and monitoring system of water quality parameters in brackish cage culture on Cha Va river. This system helps fish farmers to detect abnormal changes in water parameters via SMS messages, to have timely solutions to avoid dead fish. The system has a function for storing measurement data via webserver, helping the Fisheries Sub-Department of Ba Ria-Vung Tau province improves the monitoring and managerment cage culture on Cha Va river. The system including of sensors, microprocessor and webserver (Raspberry pi). The sensors are not placed directly in the sea water to be measured but immersed in a fresh water tank. Beginning of a measurement cycle, the tank automatically discharge fresh water and pump salt water in to the sensor tank for measurement. After measurement process is finished, the system will transmit data to webserver via GSM/GPRS or send SMS to owner if any water parameter exceed the thresholds. The sensors are then automatically washed and soaked in fresh water to ensure sensor life and accuracy and sensor calibration cycle time is extended. In addition, the Sub-Department of Fisheries can access the database to assess the aquaculture environment reality. This is the first step to lay the foundation for high-tech application in cages and aquaculture in Cha Va River, Ba Ria - Vung Tau Province.