A study on the construction of water resources drought early warning system

B. P.T. Chen, F. N.F. Chou

Research output: Contribution to journalArticlepeer-review


As an early drought prevention measure, the Water Resources Agency (WRA) of Taiwan decreed the “Regional Water Resources Regulations” in 2003, it demanding that regional water resource offices establish an appropriate water resource early warning index (WEWI) according to the given principles. However, this evaluation is subjective, and human error may affect the results when using trial and error to adjust the weights of the major and minor factors in the WEWI. The effectiveness of this system’s warnings has been doubted, because its early warning ability and warning risk cannot be explored, and thus related organizations have had a hard time using the information that the WEWI provided. The difference between early warning systems and monitoring systems is that the former should explore the uncertainty of future hydrologic conditions, and evaluate water shortage situations caused by hydrologic processes in a specific water supply district during a specific period. With regard to reservoir water supply systems, if it is known that a severe water shortage will occur in the future, then to fulfill the water demand during the operation period, early water-limiting measures may be used to avoid a disastrous water shortage before the next wet season arrives. Common sense seems to indicate the importance of system establishment pre-processing, but the empirical support is still lacked. Recent studies that have attempted to establish a direct relationship have not been very successful. The study review the suitability of “Regional Water Resources Regulations” according to the mechanism of established model that build up with the selected factors. The result of this study could be useful to water resources manager responsible for planning a water resources drought early warning system in local conditions.

Original languageEnglish
Pages (from-to)1-29
Number of pages29
JournalJournal of Taiwan Agricultural Engineering
Issue number3
Publication statusPublished - 2014 Sep

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)
  • Engineering(all)


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