本系哲學博士生蔡昭和同學的論文，題為「運用約束編程控制澳門供水系統中水的鹽度」（Controlling Salinity in the Macau Raw Water System Using a Constraint Programming），於2005年香港電機工程師學會青年會員展覽/會議研究生組別，勇奪桂冠。頒獎典禮2005年7月17日於香港順利舉行。得獎者蔡同學為本系哲學博士，由李浩文教授指導。
Salinity is the relative concentration of salts in water. The Macau raw water supply system pumped water from the West River for potable use. During the winter dry season, the intrusion of sea water could drastically raise the salinity of the West River to a high level. This may affect the daily life of some 450,000 Macau residents. The Macao Water Supply Co. Ltd. currently uses a manual trial-and-error method on a simplified computerized model to identify optimized operations of the raw water system for controlling the salinity of potable water. In this project, we apply Artificial Intelligence technique, in particular constraint programming, in the design and construction of an system to automate the optimization process. The constructed system, which is based on a more realistic model, is able to solve the problem much more efficiently and generate solutions of high quality. Our system has already been delivered to our client for deployment. As far as we know, this is the first application of constraint programming to water management domain.