Lag time of natural catchments. July 1968. Askew, A. J. en_US 2021-11-25T12:44:45Z 2021-11-25T12:44:45Z 1968 en_US
dc.description.abstract An investigation carried out into the values of lag time for catchment areas as measured from centre of mass of excess rainfall to centre of mass of resulting runoff. Since any variation of this value for an individual catchment is an indication of non-linear response, this study is closely associated with non-linearity of catchment systems. Values of lag were measured for a range of floods on five separate catchment areas and were correlated with a number of factors. The difference in value between catchments was found to be a function of the catchment characteristics, while variations in the value for an individual catchment were strongly related to the magnitude of the floods. As the degree of variation was fairly constant for the areas studiesd, the degree of non-linearity was also considered to differ little between the catchments. Three general formulae have been developed for estimating the lag time of natural catchments: suggestions made regarding their use and estimates of their probable accuracy .Development of the formulae required a detailed analysis of a large volume of hydrological data. An objective systematic procedure was developed to deal with this problem and to carry out the initial correlation studies. For this purpose, lag was measured to the centre of mass of direct runoff, and a novel measure of flood magnitude was devised, viz. weighted mean discharge. Numerous hyetograph characteristics were measured and studied, but none appeared to have any significant influence on the value of lag time. Many incidental conclusions are drawn in regard to various aspects of the work, and several topics suggested for future consideration. en_US
dc.language English
dc.language.iso EN en_US
dc.publisher University of New South Wales - Water Research Laboratory en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.source WRL Digitisation
dc.subject.other Rainfall-runoff relationships en_US
dc.subject.other Catchment areas en_US
dc.subject.other Floods en_US
dc.subject.other Rainfall en_US
dc.subject.other Lag en_US
dc.subject.other Eastern Creek en_US
dc.subject.other South Creek en_US
dc.subject.other Hacking River en_US
dc.subject.other Cawleys Creek en_US
dc.title Lag time of natural catchments. July 1968. en_US
dc.type Report en
dcterms.accessRights open access
dspace.entity.type Publication en_US
unsw.description.notePublic Number of pages: 227pp en_US
unsw.identifier.doi en_US Sydney en_US
unsw.relation.faculty Engineering
unsw.relation.ispartofreportnumber UNSW Water Research Laboratory Report No. 107 en_US
unsw.relation.originalPublicationAffiliation Askew, A. J., Water Research Laboratory, Faculty of Engineering, UNSW en_US School of Civil and Environmental Engineering *
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