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Conference Paper: Flash flood hydrologic processes of a small headwater catchment in Hong Kong

TitleFlash flood hydrologic processes of a small headwater catchment in Hong Kong
Authors
KeywordsFlash flood
Canopy interception
Direct runoff
TOPMODEL
Headwater catchment
Issue Date2009
PublisherSpringer.
Citation
The 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS, Hohai University, Nanjing, China, 20-23 October 2008. In Advances in Water Resources and Hydraulic Engineering, 2009, v. 1, p. 66-71 How to Cite?
AbstractWith frequent heavy monsoon rainfalls and steep slopes, Hong Kong suffers flash floods almost every year. For studying the features of flash floods, two automatic rainfall gauges (one under a tree and the other in the open) and one automatic water level data-logger were set up in a small catchment in the New Territories of Hong Kong, in the summer of 2007. Since then, several heavy rainfall events and related flash flood hydrographs have been recorded. This paper presents the results from analyzing these events. The study reveals that the features of canopy interception of rainfall can be linearly represented. By separating baseflow from the storm hydrographs, it was found that the direct runoff depth ratio to the total rainfall depth in this small catchment is about 2%. Finally, a rainfall-runoff model, TOPMODEL, has been applied to simulating the flash flood processes. At a one-minute time step, the model displays the capability of representing the very rapid increase of discharge on the rising limb of the flood hydrographs in the small catchment.
Persistent Identifierhttp://hdl.handle.net/10722/63207
ISBN
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Yen_HK
dc.contributor.authorChen, Jen_HK
dc.contributor.authorPeart, Men_HK
dc.contributor.authorSun, Len_HK
dc.contributor.authorLok, Wen_HK
dc.date.accessioned2010-07-13T04:18:33Z-
dc.date.available2010-07-13T04:18:33Z-
dc.date.issued2009en_HK
dc.identifier.citationThe 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS, Hohai University, Nanjing, China, 20-23 October 2008. In Advances in Water Resources and Hydraulic Engineering, 2009, v. 1, p. 66-71en_HK
dc.identifier.isbn978-3-540-89464-3en_HK
dc.identifier.urihttp://hdl.handle.net/10722/63207-
dc.description.abstractWith frequent heavy monsoon rainfalls and steep slopes, Hong Kong suffers flash floods almost every year. For studying the features of flash floods, two automatic rainfall gauges (one under a tree and the other in the open) and one automatic water level data-logger were set up in a small catchment in the New Territories of Hong Kong, in the summer of 2007. Since then, several heavy rainfall events and related flash flood hydrographs have been recorded. This paper presents the results from analyzing these events. The study reveals that the features of canopy interception of rainfall can be linearly represented. By separating baseflow from the storm hydrographs, it was found that the direct runoff depth ratio to the total rainfall depth in this small catchment is about 2%. Finally, a rainfall-runoff model, TOPMODEL, has been applied to simulating the flash flood processes. At a one-minute time step, the model displays the capability of representing the very rapid increase of discharge on the rising limb of the flood hydrographs in the small catchment.-
dc.languageengen_HK
dc.publisherSpringer.en_HK
dc.relation.ispartofAdvances in Water Resources and Hydraulic Engineering-
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectFlash flood-
dc.subjectCanopy interception-
dc.subjectDirect runoff-
dc.subjectTOPMODEL-
dc.subjectHeadwater catchment-
dc.titleFlash flood hydrologic processes of a small headwater catchment in Hong Kongen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=978-3-540-89464-3&volume=1&spage=66&epage=71&date=2009&atitle=Flash+flood+hydrologic+processes+of+a+small+headwater+catchment+in+Hong+Kongen_HK
dc.identifier.emailLi, Y: qqli239@gmail.comen_HK
dc.identifier.emailChen, J: jichen@hkucc.hku.hken_HK
dc.identifier.emailPeart, M: mrpeart@hkucc.hku.hken_HK
dc.identifier.emailSun, L: slqcug@gmail.comen_HK
dc.identifier.doi10.1007/978-3-540-89465-0_13-
dc.identifier.hkuros163924en_HK
dc.identifier.volume1-
dc.identifier.spage66-
dc.identifier.epage71-
dc.identifier.isiWOS:000268750700013-
dc.description.otherThe 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS, Hohai University, Nanjing, China, 20-23 October 2008. In Advances in Water Resources and Hydraulic Engineering, 2009, v. 1, p. 66-71-

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