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dc.contributor.author Brasington, James
dc.contributor.author Richards, Keith S.
dc.contributor.author Antonarakis, A. S.
dc.contributor.author Muller, E.
dc.contributor.author Bithell, Mike
dc.date.accessioned 2011-02-14T12:39:00Z
dc.date.available 2011-02-14T12:39:00Z
dc.date.issued 2008-04-30
dc.identifier.citation Brasington , J , Richards , K S , Antonarakis , A S , Muller , E & Bithell , M 2008 , ' Retrieval of vegetative fluid resistance terms for rigid stems using airborne lidar. ' Journal of Geophysical Research: Biogeosciences , vol 113 , no. G2 . , 10.1029/2007JG000543 en
dc.identifier.issn 2169-8961
dc.identifier.other PURE: 157641
dc.identifier.other dspace: 2160/6106
dc.identifier.uri http://hdl.handle.net/2160/6106
dc.description Antonarakis, A., Richards, K. S., Brasington, J., Bithell, M., Muller, E. (2008). Retrieval of vegetative fluid resistance terms for rigid stems using airborne lidar. Journal of Geophysical Research-Biogeosciences, 113, G02S07. en
dc.description.abstract Hydraulic resistance of riparian forests is an unknown but important term in flood conveyance modeling. Lidar has proven to be a very important new data source to physically characterize floodplain vegetation. This research outlines a recent campaign that aims to retrieve vegetation fluid resistance terms from airborne laser scanning to parameterize trunk roughness. Information on crown characteristics and vegetation spacing can be extracted for individual trees to aid in the determining of trunk stem morphology. Airborne lidar data were used to explore the potential to characterize some of the prominent tree morphometric properties from natural and planted riparian poplar zones such as tree position, tree height, trunk location, and tree spacing. Allometric equations of tree characteristics extrapolated from ground measurements were used to infer below-canopy morphometric variables. Results are presented from six riparian-forested zones on the Garonne and Allier rivers in southern and central France. The tree detection and crown segmentation (TDCS) method identified individual trees with 85% accuracy, and the TreeVaW method detected trees with 83% accuracy. Tree heights were overall estimated at both river locations with an RMSE error of around 19% for both methods, but crown diameter at the six sites produced large deviations from ground-measured values of above 40% for both methods. Total height-derived trunk diameters using the TDCS method produced the closest roughness coefficient values to the ground-derived roughness coefficients. The stem roughness values produced from this method fell within guideline values. en
dc.language.iso eng
dc.relation.ispartof Journal of Geophysical Research: Biogeosciences en
dc.subject fluid resistance en
dc.subject airborne lidar en
dc.subject riparian forests en
dc.subject stem roughness en
dc.subject allometry en
dc.title Retrieval of vegetative fluid resistance terms for rigid stems using airborne lidar. en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1029/2007JG000543
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution River Basin Dynamics and Hydrology en
dc.description.status Peer reviewed en


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