Show simple item record

dc.contributor.authorPrebitero, A.en_US
dc.contributor.authorRose, Calvinen_US
dc.contributor.authorYu, Bofuen_US
dc.contributor.authorCiesiolka, C.en_US
dc.contributor.authoroughlan, K.en_US
dc.contributor.authorFentie, B.en_US
dc.date.accessioned2017-04-24T07:52:56Z
dc.date.available2017-04-24T07:52:56Z
dc.date.issued2005en_US
dc.date.modified2010-07-06T06:59:48Z
dc.identifier.issn10873562en_US
dc.identifier.doi10.1175/EI121.1en_AU
dc.identifier.urihttp://hdl.handle.net/10072/4379
dc.description.abstractAt the Visayas State College of Agriculture (ViSCA) on the island of Leyte in the Philippines, hydrologic and soil-loss measurements were recorded for 32 erosion events over 3 yr on three 12-m-long bare soil plots with slopes of approximately 50%, 60%, and 70%. Measurements included rainfall and runoff rates at 1-min intervals, total soil lost per event from the plot, rill details when observed after an erosion event, and soil settling-velocity characteristics. Storm events are characterized by high rainfall rates but quite low rates of runoff, because of the consistently high infiltration rate of the stable clay soil (an Oxic Dystropept). Both observation and modeling indicated that overland flow is commonly so shallow that much of the soil surface is likely to be unsubmerged. For the 70% slope plot, half the events recorded mean sediment concentrations from 100 to 570 kg m-3. A somewhat constant hydrologic lag between rainfall and runoff is used to estimate a Manning's roughness coefficient n of about 0.1 m-1/3 s, a value used to estimate velocity of overland flow. Possible effects of shallow flows and high sediment concentrations on existing erosion theory are investigated theoretically but are found to have only minor effects for the ViSCA dataset. A soil erodibility parameter ߠwas evaluated for the data whenever rilling was recorded following an erosion event. The values of ߠindicate that, except for events with higher stream powers, other erosion processes in addition to overland flow could have contributed to soil loss from erosion plots in a significant number of events.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent546025 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Geophysical Unionen_US
dc.publisher.placeUSAen_US
dc.publisher.urihttp://earthinteractions.org/en_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom1en_US
dc.relation.ispartofpageto30en_US
dc.relation.ispartofissue5en_US
dc.relation.ispartofjournalEarth Interactionsen_US
dc.relation.ispartofvolume9en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode300805en_US
dc.titleInvestigation of soil erosion from bare steep slopes of the humid tropic Philippinesen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2005 American Geophysical Union. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.en_AU
gro.date.issued2005
gro.hasfulltextFull Text


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record