標題: Monitoring of Sediment Transport in a Reservoir using Time Domain Reflectometry
作者: Chung, Chih-Chung
Lin, Chih-Ping
Wu, Po-Lin
Hsieh, Sheau-Ling
Wu, Ching-Hsien
土木工程學系
防災與水環境研究中心
Department of Civil Engineering
Disaster Prevention and Water Environment Research Center
關鍵字: Density current;Sediment monitoring;Sediment transport;Time domain reflectometry (TDR)
公開日期: 1-Jan-2013
摘要: Due to geological weathering and climate change, soil erosion in watershed is becoming a serious problem in Taiwan. Large amount of sediment transports to reservoirs during typhoon events and affects the water quality. Density currents in reservoirs have high sediment concentration. The accumulated sediments have significantly reduced the reservoir capacity. Monitoring of sediment transport in a reservoir plays an important role in reservoir management. The existing techniques for suspended sediment concentration (SSC) monitoring, such as optical and acoustic methods, are sensitive to particle size or limited in measurement range. Furthermore, these techniques may not be cost effective for field monitoring due to the required maintenance and spatial coverage. A new technique based on time domain reflectometry (TDR) was recently introduced. It possesses several advantages including particle-size independence, low-cost transducers, durability, and cost-effective multiplexing. This study modified the TDR technique for better field applicability and demonstrated how it can be deployed as a full monitoring program for reservoir management through a case study in the Shihmen reservoir, Taiwan. Monitoring stations at upstream riverbank and outflow channels were installed with fixed protective structures to provide inflow and outflow sediment-discharge records. To capture the characteristics of density currents, multi-depth monitoring stations were designed and deployed on floats in the reservoir. Some of the data collected during Typhoon Fung-Wong are presented as an example to demonstrate the effectiveness and benefits of the monitoring station.
URI: http://hdl.handle.net/11536/125085
ISBN: 978-7-302-33544-3
ISSN: 
期刊: PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS I AND II
起始頁: 6115
結束頁: 6127
Appears in Collections:Conferences Paper