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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 7- EXTREME EVENTS, NATURAL VARIABILITY AND CLIMATE CHANGE : RECENT CHANGES IN THE SUSPENDED SEDIMENT DISCHARGE IN THE CHENYULAN WATERSHED, TAIWAN
RECENT CHANGES IN THE SUSPENDED SEDIMENT DISCHARGE IN THE CHENYULAN WATERSHED, TAIWAN
Author : JINN-CHYI CHEN , WEN-SHUN HUANG , JI-SHANG WANG & TSUNG-FENG HUANG
This paper examines the variation in the characteristics of rainfall events triggering numerous debris flows and the effects on the suspended sediment discharge in the Chenyulan watershed, central Taiwan. The data of rainfall, runoff, or water discharge Q and suspended sediment discharge Q were collected from three meteorological stations and the Neimaopu w s hydrological station located in the watershed during the past few decades (1980?2012). Five extreme rainfall events with 2 the rainfall index RI > 365 cm /h and the severe Chi-Chi earthquake (CCE) are selected. The relationships between Q s and Q at various periods, such as between extreme rainfalls or between extreme rainfall and the CCE, are analyzed. w The changes in Q or the ratio of suspended sediment discharge ( r ) at various Q are presented and discussed. The s w relationship between r and RI is also presented. The results show that Q at Q = 10~100 cms after suffering extreme s w rainfall events, and the CCE is 2~7 times greater than that without suffering extreme rainfalls or severe earthquakes in the watershed. The Q increase could be related to abundant loose sediment caused by the CCE and extreme rainfall events s caused numerous debris flows during the 2000s.
File Size : 274,343 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 7- EXTREME EVENTS, NATURAL VARIABILITY AND CLIMATE CHANGE
Date Published : 20/04/2016
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