ABSTRACT
In 1990, the Drainage Department of the Ministry of the Environment installed a computerized telemetric system, costing $230,000, for monitoring one of the country's most important drainage facilities, the Bukit Timah-Kallang River System. The system provides information on the water levels and rainfall conditions at the monitored areas. In addition, it has the capability for generating automated flood-warning messages. The operation of the telemetric monitoring system involves distributed, parallel processing under the supervision of the Central Monitoring Unit, and asychronous wide-area communication between the parallel software processes. The system provides the essential data for drainage master-plan review to cater for long-term flood protection of the Bukit Timah-Kallang catchments, as this central core of Singapore will become more intensely developed into the 21 st century. The pressure transmitter is the electronic water-level sensor at each of the water-level monitoring stations. It is essentially a variable voltage output device whose output is proportional to the pressure of water in the drainage channel.
