IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : 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(1), WEN-SHUN HUANG(2), JI-SHANG WANG(3) & TSUNG-FENG HUANG(4)
ABSTRACT
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 Qw and suspended sediment discharge Qs were collected from three meteorological stations and the Neimaopu
hydrological station located in the watershed during the past few decades (1980ĘC2012). Five extreme rainfall events with
the rainfall index RI > 365 cm2/h and the severe Chi-Chi earthquake (CCE) are selected. The relationships between Qs
and Qw at various periods, such as between extreme rainfalls or between extreme rainfall and the CCE, are analyzed.
The changes in Qs or the ratio of suspended sediment discharge ( r ) at various Qw are presented and discussed. The
relationship between r and RI is also presented. The results show that Qs at Qw = 10~100 cms after suffering extreme
rainfall events, and the CCE is 2~7 times greater than that without suffering extreme rainfalls or severe earthquakes in the
watershed. The Qs increase could be related to abundant loose sediment caused by the CCE and extreme rainfall events
caused numerous debris flows during the 2000s
File Size : 248,668 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Extreme events, natural variability and climate change
Date Published : 28/08/2015
Download Now