Articles | Volume 15, issue 5
https://doi.org/10.5194/nhess-15-1011-2015
https://doi.org/10.5194/nhess-15-1011-2015
Research article
 | 
21 May 2015
Research article |  | 21 May 2015

Representing hydrodynamically important blocking features in coastal or riverine lidar topography

B. R. Hodges

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Cited articles

Abu-Aly, T. R., Pasternack, G. B., Wyrick, J. R., Barker, R., Massa, D., and Johnson, T.: Effects of LiDAR-derived, spatially distributed vegetation roughness on two-dimensional hydraulics in a gravel-cobble river at flows of 0.2 to 20 times bankfull, Geomorphology, 206, 468–482, https://doi.org/10.1016/j.geomorph.2013.10.017, 2014.
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Bhuiyan, M. J. A. N. and Dutta, D.: Assessing impacts of sea level rise on river salinity in the Gorai river network, Bangladesh, Estuar. Coast. Shelf Sci., 96, 219–227, https://doi.org/10.1016/j.ecss.2011.11.005, 2012.
Casas, A., Lane, S. N., Yu, D., and Benito, G.: A method for parameterising roughness and topographic sub-grid scale effects in hydraulic modelling from LiDAR data, Hydrol. Earth Syst. Sci., 14, 1567–1579, https://doi.org/10.5194/hess-14-1567-2010, 2010.
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Short summary
Many of the features that either block or channelize flooding are too narrow to represent in conventional hydrodynamic (water flow) models, which must work at wider grid scales. New methods have been developed for identifying important features and representing their effects on blocking or controlling flooding. These methods are automated so that a fine-resolution lidar digital terrain model can be easily processed to a coarser resolution while retaining narrow blocking features.
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