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 : 35th IAHR Congress - Chengdu (2013) : THEME 8 - CLIMATE CHANGE AND HAZARD MITIGATION : Observation and Analysis Hydrological Processes in a Headwater Catchment in Hong Kong, China
Observation and Analysis Hydrological Processes in a Headwater Catchment in Hong Kong, China
Author : Qian Xu, Ji Chen, Liqun Sun and Mervyn PEART
This study aims to improve our understanding of the relationship between rainfall and runoff over small headwater catchments. In the summer of 2007, several rain gauges and one automatic water lever data-logger were installed in a headwater catchment located in the New Territories of Hong Kong, and since then, the rainfall data and the water level have been recorded at the one minute time step. Analysis of the recorded data revealed that intense and short rainfall events frequently occur at the catchment. Using three classical baseflow separation methods (namely, the straight line method, inflection point method and one parameter filter method), this study computes direct runoff volumes for 24 storms. Their runoff coefficients (which are the ratios of direct runoff volumes to the total rainfall volumes) are obtained; the analysis shows that direct runoffs can contribute about 82% of flood peak discharges, but the average runoff coefficients (which are the ratios of direct runoff volumes to the total rainfall volumes) are less than 4%. Then, a linear regression model was to construct to prediction runoff coefficients, P 3 (antecedent baseflow in m \min) as independent variables. (total precipitation in mm) and D b
File Size : 377,159 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Article : THEME 8 - CLIMATE CHANGE AND HAZARD MITIGATION
Date Published : 19/07/2016
Download Now