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dc.contributor.authorYu, Bofuen_US
dc.contributor.editorRichard L Mulvaney, Nicholas H. Rhodehamelen_US
dc.date.accessioned2017-05-03T12:11:41Z
dc.date.available2017-05-03T12:11:41Z
dc.date.issued2003en_US
dc.date.modified2009-08-31T21:51:24Z
dc.identifier.issn03615995en_US
dc.identifier.doi10.2136/sssaj2003.2510en_AU
dc.identifier.urihttp://hdl.handle.net/10072/6008
dc.description.abstractTwo modeling frameworks have been developed to describe and predict soil erosion and sediment deposition in recent years. The first is based on the concept of transport capacity. Deposition occurs only when the transport capacity is exceeded. This approach has been implemented in WEPP (Water Erosion Prediction Project) and several other physically based erosion prediction models. An alternative approach is based on simultaneous erosion and deposition. Net erosion or deposition is seen as a result of the dynamic interactions among all processes involved. The simultaneous erosion and deposition approach lays the foundation for GUEST (Griffith University Erosion System Template) and for recent studies of multi-size sediment deposition. This paper uses the original governing equations for WEPP and GUEST to represent the two approaches to water erosion and deposition modeling. The paper shows analytically that the two sets of governing equations, while vastly different in their appearance, share an identical structure, and thus can be reduced to a common set of equations unifying both approaches. The unified framework involves four terms: (i) sediment concentration at the transport limit, (ii) flow detachment, (iii) sedimentation because of gravity, (iv) a rainfall-driven sediment source term. The two modeling frameworks show only minor differences in how these four terms are formulated. Analytical solutions to the unified erosion and deposition equations show that the characteristic length for erosion is the ratio of maximum sediment discharge to maximum rate of detachment, and the characteristic length for deposition is the ratio of minimum sediment discharge to minimum rate of deposition, or simply the ratio of unit discharge to fall velocity. The paper clarifies and simplifies the current approaches to erosion and deposition modeling.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent89305 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherSoil Science Society of Americaen_US
dc.publisher.placeUnited Statesen_US
dc.publisher.urihttp://soil.scijournals.org/en_AU
dc.relation.ispartofpagefrom251en_US
dc.relation.ispartofpageto257en_US
dc.relation.ispartofissue1en_US
dc.relation.ispartofjournalSoil Science Society of America Journalen_US
dc.relation.ispartofvolume67en_US
dc.subject.fieldofresearchcode260502en_US
dc.titleA Unified Framework for Water Erosion and Deposition Equationsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.facultyGriffith Sciences, Griffith School of Engineeringen_US
gro.rights.copyrightCopyright remains with the author 2003. This is the author-manuscript version of this paper. It is posted here with permission of the copyright owner for your personal use only. No further distribution permitted. For information about this journal please refer to the publisher's website or contact the author.en_AU
gro.date.issued2003
gro.hasfulltextFull Text


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