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項次 書目
1
題名:Estimating the Suspended Sediment Load by Using the Historical Hydrometric Record from the Lanyang-Hsi Watershed    
著者:Shuh-Ji KaoKon-Kee Liu
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:Lanyang-Hsi River ; Sediment Load ; Taiwan ; Rating Curve
刊名:Terrestrial, Atmospheric and Oceanic Sciences
卷期:12卷2期(2001.6)
頁碼:401-414
語言:英語
摘要: 英文摘要PDF

The long-term (1950-94) hydrometric data archived by the Water Resources Bureau (WRB) at the gauge station near the Lanyang-His river mouth were re-processed to derive the time-series of suspended sediment load. A bias-corrected rating-curve method was used to estimate the sediment load. The statistical analysis provides a criterion for the construction of adequate rating curves. In most cases, yearly data were used to establish the rating curves. Estimated results showed strong inter-annual variations of sediment loads, ranging from 0.05 to 37 Mt yr-1, which differs from the narrow range (7.9-8.1 Mt yr-1) of long-term averages reported in the Hydrological Yearbooks. Two peaks of sediment load (>15 Mt yr-1) occurred in the years following two road construction events, indicating the exacerbation of erosion in the watershed induced by human activities. This study indicates that WRB's long-term average method smoothes out the temporal fluctuation and, therefore, misses important information borne in the data. Hence, we suggest that historical data can be reprocessed to estimate yearly sediment load, which may lead to a better understanding of the sediment yielding process and its response to human disturbances.


    

本卷期目次
Terrestrial, Atmospheric and Oceanic Sciences 12卷2期 (2001.6)
Alfven Soliton and Intermediate Shock in the Solar Wind/ Song LitingXiao Chijie
Characteristics of Tropospheric Column Ozone over Taiwan/ Chung-Ming LiuHsiu-Wu Chang
Seasonal Forecasts for Asia: Global Model Experiments/ Shyh-Chin ChenMing-Chin WuJohn O. Roads
Estimating the Suspended Sediment Load by Using the Historical Hydrometric Record from the Lanyang-Hsi Watershed/ Shuh-Ji KaoKon-Kee Liu
Hydrographic and Satellite Observations of Summertime Upwelling in the Taiwan Strait: A Preliminary Description/ Jian-Yu HuHiroshi KawamuraHua-Sheng HongMasateru SuetsuguMing-Sen Lin
Source Parameters of Regional Earthquakes in Taiwan: January-December, 1997/ Honn KaoYu-Hua LiuPei-Ru Jian
 
   
 
   

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