English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 6507/11669
造訪人次 : 29618602      線上人數 : 247
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 進階搜尋

請使用永久網址來引用或連結此文件: http://ir.ncue.edu.tw/ir/handle/987654321/17567

題名: Transport-Dominated Sediment Loading in Taiwanese Rivers: A Case Study from the Ma-an Stream
作者: Kao, Shuh‐Ji;Chan, Shih-Chien;Kuo, Ching‐Huei;Liu, Kon‐Kee
貢獻者: 地理學系
日期: 2005-03
上傳時間: 2013-12-03T03:10:51Z
出版者: The University of Chicago Press
摘要: Abstract We report newly obtained data of total suspended sediment concentrations (Cs) and water discharges from the Ma‐an Stream in the eastern Taiwan, where intermittent supply‐limited conditions with a minimal constant load were invoked for sediment discharge (Hovius et al. 2000). The main evidence for the supply‐limited condition is the many zero values of Cs corresponding to low‐flow conditions recorded in the hydrological archive of the Water Resources Agency (WRA) of Taiwan. Such conditions form a distinct mode in the rating relationship between loading and discharge, which is discontinuous from the normal mode. However, our data raise serious doubt regarding the sensitivity of the measurements that produced data in support of the minimal constant load. A field sampling from April 4 to May 5, 2003, was conducted in the Ma‐an Stream during a very dry period. Our observations showed no zero values, even though the sampling period was one of the driest periods in comparison with historical records. In our study, 11 of 35 daily samples gave Cs values between 10 and 100 mg L−1, whereas only one record from the entire 1980–1994 WRA data set fell in this range, indicating the poor sensitivity of the WRA measurements. Our observations contradict the fact that more than two‐thirds of Cs values are null in the WRA records for the rivers at the foothills of the Central Range in eastern Taiwan. The relationships between Cs and discharge and between sediment loading and discharge all demonstrate that our data are consistent with the trend manifested by the nonzero values from the WRA records. Therefore, we conclude that the existing data do not support the proposed discontinuous dual‐mode rating relationship for rivers at the foothills of the Central Range in eastern Taiwan.
關聯: The Journal of Geology, 113(2): 217-225
顯示於類別:[地理學系] 期刊論文

文件中的檔案:

檔案 大小格式瀏覽次數
index.html0KbHTML561檢視/開啟


在NCUEIR中所有的資料項目都受到原著作權保護.

 


DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋