圖書典藏及影音數位平台

102年後迄今，高屏堰受到莫拉克颱風過後河床整體淤高、相關穩定取水改善工程設施、下游鐵路橋與曹公堰之迴水效應等影響，其既有取放水路、進水口、橡皮壩等之流量率定曲線，有重新檢討之必要；左岸相關受損之改善工程，如丁壩群、低水護岸等，其功能性與是否更新改善，亦有檢討之必要。此外，因應大數據時代來臨，應檢討相關改善策略之先期研究成果，進一步規劃與研擬高屏堰後續之短、中與長期穩定取水策略。爰此，成立本委託計畫

After typhoon Morakot, there are significant morphological changes associated with the channel deposition and highly sediment concentration inKaoping River. To ensure the stable water supply of Kaoping Weir, Southern Region Water Resources Office, WRA proposed four major strategies in 2012, e.g., stabilizing the flow path of water intake facility, improving the weir operation, enhancing the level of flood prevention, and developing the alternate sources of water supply. In these strategies, most of the short-term countermeasures have been performed, including dredging the channel, setting up the diversion dike of Kaoping Weir, building the embankment in the reach of Tashu, and building the hyporheic flow intake facility, etc. However, due to the effects of typhoon Morakot, the existed water intake facility discharge rating curve of Kaoping Weir should be discussed and modified. The basic data and bed material should be continuously collected. In addition, for improving the stable water supply of Kaoping Weir, it is also needed to investigate the effects about modifying the 1st rubber weir, repairing the left bank protection works, and reducing the height of Tsaogung Weir. According to the forward-looking smart water management and the stable water supply strategies of Kaoping Weir, the purpose of this study is to estabish an advanced methodology for measuring the discharge of Kaoping Weir in a long-term. By using the acoustic Doppler current profiler, ADCP, the flow discharge of water intake and rubber weir of Kaoping Weir are collected. The data could be used for the regression and modification of existed discharge rating curve. The CCHE2D and CCHE3D mobile-bed models are selected to simulate the stable water supply strategy cases in the study reach, e.g., effects of division dike of Kaoping Weir, heightening the base of 1st rubber weir, repairing and modifying the left bank protection works, and reducing the height of Tsaogung Weir. From the investigation and simulated results, it shows that the existed division dike of Kaoping Weir could reduce the flow velocity near the 1st rubber weir, and thare are no affects for the water intake. Heightening the base of 1st rubber weir will increase the flow velocity and decrease the deposition near the 2nd rubber weir, which is helpful for the operation of rubber weir after typhoon floods. Repairing and modifying the left bank protection works associated with the geotextile tube shows the well-benefits of protecting the left bank during the floods. Reducing the height of Tsaogung Weir in local region will increase the flow velocity in the upstream reach, then derease the deposition near the Kaoping Weir. Finnally, according to the study results in this year, the strategies of short-term, mid-term and long-term for forward-looking smart water management and stable water supply of Kaoping Weir are proposed and suggested.