Relative elevation topographic surface modelling of a large alluvial river floodplain and applications for the study and management of Riparian landscapes

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TitleRelative elevation topographic surface modelling of a large alluvial river floodplain and applications for the study and management of Riparian landscapes
Publication TypeJournal Article
Year of Publication2008
AuthorsGreco SE, Girvetz EH, Larsen EW, Mann JP, Tuil JL, Lowney C
JournalLandscape Research
Volume33
Pagination461-486
ISBN Number0142-6397
Accession NumberISI:000258295400005
Abstract

This paper presents a novel and useful spatial modelling technique to create a topographic surface that estimates a floodplain's elevation relative to the average low-flow water surface elevation of a river channel. This model was applied to a 121km study area of the middle Sacramento River, California, USA, where it was tested as a surrogate for observed water table depth and an observed 3.3 year recurrence interval flood inundation surface using independent data sets. The modelled relative elevation topographic surface correlated significantly (p < 0.005) to observed well water depths suggesting that the modelled surface reflected a reasonable approximation of vertical distance to the water table. Results from a flood inundation pattern analysis indicated an overall accuracy of 79% for correctly predicting inundated and non-inundated zones. The model was then used to measure relative channel bank height and the distribution of riparian plant communities to examine landscape ecological relationships.

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Original

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Additional

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