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dc.contributor.authorYu, B
dc.contributor.authorRose, CW
dc.contributor.authorCiesiolka, CCA
dc.contributor.authorCakurs, U
dc.date.accessioned2017-05-03T13:29:06Z
dc.date.available2017-05-03T13:29:06Z
dc.date.issued2000
dc.identifier.issn0262-6667
dc.identifier.doi10.1080/02626660009492372
dc.identifier.urihttp://hdl.handle.net/10072/3079
dc.description.abstractRainfall and runoff data collected from plots (108 m2) at 1-min intervals allow accurate determination of the time difference between peak rainfall intensity and peak runoff rate. Manning's equation for fully turbulent flows implies that a power function can be used to characterize the relationship between the lag time and peak runoff rate. An exponent close to -0.4 would validate the Manning's equation for overland flow and the coefficient can then be used to estimate the roughness coefficient (Manning's n) during natural storm events. The relationship between the observed lag time and peak runoff rate was investigated for three different surface treatments on a loamy sand: (a) bare fallow, (b) farmers' practice-pineapple beds with bare furrows constructed across the slope, and (c) furrows covered with mulch from residues of previous pineapple crops. Manning's equation was found to be applicable for these treatments and Manning's n is consistently between 0.04 and 0.06. The relationship between lag time and peak runoff rate can be used to model runoff hydrographs at the plot scale. The effect of mulch cover on flow resistance was found to be minimal. Velocity measurements using a dye tracing technique at the same site showed similar results, although the estimated Manning's n was lower. Resistance to flow was significantly increased only when fresh pineapple leaves from a growing pineapple crop were in contact with the soil.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherIAHS Press
dc.publisher.placeUK
dc.relation.ispartofpagefrom709
dc.relation.ispartofpageto726
dc.relation.ispartofjournalHydrological Sciences Journal
dc.relation.ispartofvolume45 (5)
dc.subject.fieldofresearchPhysical geography and environmental geoscience
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchEnvironmental engineering
dc.subject.fieldofresearchHistory, heritage and archaeology
dc.subject.fieldofresearchHydrology
dc.subject.fieldofresearchcode3709
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode4011
dc.subject.fieldofresearchcode43
dc.subject.fieldofresearchcode3707
dc.titleThe relationship between runoff rate and lag time and the effects of surface treatments at the plot scale
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Engineering
gro.date.issued2015-06-05T03:53:55Z
gro.hasfulltextNo Full Text
gro.griffith.authorRose, Calvin W.
gro.griffith.authorYu, Bofu


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