Regional-scale sedimentation process models from airborne gamma ray remote sensing and digital elevation data
作者： Geoff Pickup , Alan Marks
DOI: 10.1002/1096-9837(200103)26:3<273::AID-ESP150>3.0.CO;2-#
关键词:
摘要: Airborne gamma ray survey data were used to provide information on potassium, thorium and uranium concentrations in surface soil rock arid central Australia. Spatial patterns these radioelements allow tracing of paths sediment at catchment scale. Survey elevation are combined with contour produce digital models for terrain analysis, flow modelling extreme floods. Gamma show consistent variation slope, a limited range drainage areas, erosion/deposition derived from the conservation mass equation. Supply-limited transport give reasonable reproduction observed radioelement distribution but some elements pattern reflect area inundated by 500–1000 year floods rather than effects simple downslope movement. Partial supply downstream accumulation erosion deposition rates calculated using equation laws based slope alone stream power. Comparison suggests that both apply different parts landscape. Regional-scale will require depending location landscape event frequency. This approach may estimation delivery ratios. Copyright © 2001 John Wiley & Sons, Ltd.
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