- freely available
Remote Sens. 2019, 11(17), 2031; https://doi.org/10.3390/rs11172031
2. Data and Methods
2.1. Study Site
2.1.1. System Form
2.1.2. Character of the Storm Desmond Event
2.2. Data Collection and Processing
2.2.1. Aerial Imagery and Historic Maps
2.2.2. Topographical Data
2.2.3. Historic Lidar
2.2.4. Error Handling
2.2.5. Surface roughness estimation
Change Evidence from Mapping and Imagery
- Extreme response is moderated by the current competence of flood flows to mobilise larger sediment which remains as a relic of more energetic post-glacial conditions.
- Fine sediment stripping down to the remnant post-glacial sediment expands the flood channel to create erosive coarse sediment units.
- Lateral change is restricted, again linked to an inability to erode large calibre bank sediment.
- Channel movement within the active belt width is primarily through sub-channel creation, these appear to follow palaeo-routes, stripping out smaller calibre sediment.
- Abandoned channels become filled with smaller calibre flood sediment.
- Local channel slope exerted a weak influence on deposition whilst width change did not impact on bedload transport.
- Released finer bedload (mostly gravels) are rapidly re-deposited across inset channel berms and bars downstream.
- Relatively little coarse sediment is exported from the channel.
Conflicts of Interest
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|Survey||Number of Images||DTM Resolution (m)||Ortho Resolution (m)||X Error (m)||Y Error (m)||Z Error (m)||Combined Error (m)|
|UAV survey 1||467||0.04||0.01||0.014||0.025||0.007||0.030|
|UAV survey 2||530||0.04||0.01||0.017||0.014||0.021||0.037|
|River||Volume Deposited (m3)||Volume Eroded (m3)||Volume Balance (m3)||Areal Equivalent (m)|
|Liza Beck at Langthwaite||6404.3||5177.5||1226.8||0.036|
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