圖書典藏及影音數位平台

水文觀測資料係政府在防災應變、水資源利用等重要決策上最主要之依據。因此，持續提昇水文觀測技術，並確保觀測儀器準確度，為當前最關鍵與最具急迫性的任務之一。為有效應用有限之資源，本計畫著眼河川表面自動化流速量測，除可滿足當前急迫性需求外，亦可獲兼顧作業人員安全、本土化研發等特色。

It is the purpose of present project to develop a disposal satellite-tracked drifter buoy for surface flow speed measurement in the Taiwanese river especially for the duration of hazardous rainfall conditions. Due to the high risks of manual measurement during extreme weather, the drifter and associated supporting sub-systems are designed for routine and automated operations. This Lagrangian measurement provide along-stream data instead of only at a fixed location. With periodic deployment, both spatial and temporal data could be obtained. The dataset and format could be integrated with present system with ease which fulfill the increasing demands from hazard mitigation, engineering design and water utilization applications.The results of the project through the Internet of Things technology (IoT) , big data and cloud computing analysis can be used to reduce the risk of flooding and loss. The prototype of this drifter system has been demonstrated its capability in the field experiments in coastal zone. The drifter system is low-cost, expandable in measuring items and equipped with GUI function. It is planned to deployed at least 180 drifters in the main river during three events this year. The temporal resolution and spatial coverage could be benefit from mass drifters launch, which makes it possible to monitor and investigate the peak-flood wave propagation and evolution. The feasibility study of using this system will be carried out. The optimal parameters within the operations could be tuned after the in-situ experiments this year. It is finally scheduled to propose the guidelines of the observation in operational mode.