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Article: Conversion of unit hydrographs by complementary hydrograph method

TitleConversion of unit hydrographs by complementary hydrograph method
Authors
KeywordsConversion
Hydrographs
Rainfall
Issue Date2002
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/he.html
Citation
Journal Of Hydrologic Engineering, 2002, v. 7 n. 6, p. 420-427 How to Cite?
AbstractA method to convert a known unit hydrograph to unit hydrographs of different durations, as an alternative to the S-Hydrograph method, is introduced. The method-called the Complementary Hydrograph method-involves a process of decomposing a known unit hydrograph of duration t o into a pair of "complementary" hydrographs associated with two sequential rainfalls with the sum of their durations equal to t o. In converting the t o-hour unit hydrograph into a t a-hour unit hydrograph, the method produces a unit hydrograph of duration t b=(t o-t a) concurrently. In hydrograph conversion, the Complementary Hydrograph method produces an identical result to the well-established S-Hydrograph method and involves a comparable number of computational steps. In certain special cases, such as converting a unit hydrograph into one with half its duration, the new method requires fewer computational steps. While the two methods employ different approaches in their solutions of hydrograph conversion problems, the agreement in their results stems from the fact that both methods are founded on the same principles of superposition and linearity of the unit hydrograph method. The S-Hydrograph method can also be viewed as a special case of the Complementary Hydrograph method in which the known hydrograph is associated with a storm of infinite duration and uniform intensity. The Complementary Hydrograph method offers a more unified and versatile approach in dealing with various types of unit-hydrograph conversion problems. For example, the method can be extended to derive unit hydrographs from a hydrograph associated with a multiperiod, varied intensity rainfall. The use of S-Hydrograph method for hydrograph derivation can only be applied to hydrographs resulting from a single-period rainfall of uniform intensity.
Persistent Identifierhttp://hdl.handle.net/10722/185366
ISSN
2015 Impact Factor: 1.53
2015 SCImago Journal Rankings: 0.819
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChen, CNen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:31:57Z-
dc.date.available2013-07-30T07:31:57Z-
dc.date.issued2002en_US
dc.identifier.citationJournal Of Hydrologic Engineering, 2002, v. 7 n. 6, p. 420-427en_US
dc.identifier.issn1084-0699en_US
dc.identifier.urihttp://hdl.handle.net/10722/185366-
dc.description.abstractA method to convert a known unit hydrograph to unit hydrographs of different durations, as an alternative to the S-Hydrograph method, is introduced. The method-called the Complementary Hydrograph method-involves a process of decomposing a known unit hydrograph of duration t o into a pair of "complementary" hydrographs associated with two sequential rainfalls with the sum of their durations equal to t o. In converting the t o-hour unit hydrograph into a t a-hour unit hydrograph, the method produces a unit hydrograph of duration t b=(t o-t a) concurrently. In hydrograph conversion, the Complementary Hydrograph method produces an identical result to the well-established S-Hydrograph method and involves a comparable number of computational steps. In certain special cases, such as converting a unit hydrograph into one with half its duration, the new method requires fewer computational steps. While the two methods employ different approaches in their solutions of hydrograph conversion problems, the agreement in their results stems from the fact that both methods are founded on the same principles of superposition and linearity of the unit hydrograph method. The S-Hydrograph method can also be viewed as a special case of the Complementary Hydrograph method in which the known hydrograph is associated with a storm of infinite duration and uniform intensity. The Complementary Hydrograph method offers a more unified and versatile approach in dealing with various types of unit-hydrograph conversion problems. For example, the method can be extended to derive unit hydrographs from a hydrograph associated with a multiperiod, varied intensity rainfall. The use of S-Hydrograph method for hydrograph derivation can only be applied to hydrographs resulting from a single-period rainfall of uniform intensity.en_US
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/he.htmlen_US
dc.relation.ispartofJournal of Hydrologic Engineeringen_US
dc.subjectConversionen_US
dc.subjectHydrographsen_US
dc.subjectRainfallen_US
dc.titleConversion of unit hydrographs by complementary hydrograph methoden_US
dc.typeArticleen_US
dc.identifier.emailTang, CY: tangc@hku.hken_US
dc.identifier.authorityTang, CY=rp01765en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1061/(ASCE)1084-0699(2002)7:6(420)en_US
dc.identifier.scopuseid_2-s2.0-0036843596en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036843596&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume7en_US
dc.identifier.issue6en_US
dc.identifier.spage420en_US
dc.identifier.epage427en_US
dc.identifier.isiWOS:000179021700003-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChen, CN=7501962208en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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