Hyperspatial Imagery in Riverine Environments - Fluvial Remote Sensing for Science and Management - page 185

a silver bullet capable of meeting all our sampling needs.
A very obvious and simple reminder of this fact is the
inapplicability of these methods to small channels with
significant overarching vegetation (i.e. tunnelling). If we
cannot see the channel from the air, even hyperspatial
imagery will be ineffective as a sampling tool. Another
crucial area which still requires fieldwork is the sampling
of biota. The recent progress in river sciences has left us in a
situation where our ability to map abiotic parameters and
physical habitat greatly exceeds our ability to map lotic
biota. This discrepancy will clearly need to be addressed.
However in the near future, hyperspatial imagery can
be a powerful addition to the river sciences 'toolbox'
when used in conjunction with other data sources and
field-based sampling.

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Acknowledgements

The authors thank all the persons who very kindly par-
ticipated in the Drone Pixy project applied to the fluvial
corridor, all students and colleagues who helped dur-
ing the pixy campaigns, especially Thierry Fournier and
Marie-Laure Tremelo and the ZABR which funded and
supported this effort. We also thank Rodolphe Mon-
tagnon the pilot of the power paraglider, A. Hervouet,
M. Gagnage, B. MacVicar, James, T.D., and J. Riquier,
for kindly providing data and figures for this chapter.
Furthermore, we would like to thank Dr Mark Fonstad
for discussions and assistance in the resolution of the
shadow removal problem.

S.J. 2011. Making riverscapes real. Geomorphology .

DOI:10.1016/j.geomorph.2010.09.030
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1413-1423.
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Catchment-scale mapping of surface grain size in gravel
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