LiDAR resolution for catchment-inclusive hydrodynamic models

LiDAR resolution for catchment-inclusive hydrodynamic models

Hydrodynamic models are usually based on LiDAR but there is little information on the LiDAR resolution required for appropriate model accuracy. In this study, algorithms to prepare DEM and roughness grids suitable for hydrodynamic modelling of both catchment and floodplain are applied to low, medium...

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Main Author: Smart Graeme
Format: Article
Language:English
Published: EDP Sciences 2018-01-01
Series:E3S Web of Conferences
Online Access:https://doi.org/10.1051/e3sconf/20184006031
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spelling doaj-5fb129cde0964345bb0eaab09467d58a2021-02-02T07:56:31ZengEDP SciencesE3S Web of Conferences2267-12422018-01-01400603110.1051/e3sconf/20184006031e3sconf_riverflow2018_06031LiDAR resolution for catchment-inclusive hydrodynamic modelsSmart GraemeHydrodynamic models are usually based on LiDAR but there is little information on the LiDAR resolution required for appropriate model accuracy. In this study, algorithms to prepare DEM and roughness grids suitable for hydrodynamic modelling of both catchment and floodplain are applied to low, medium and high point-density LiDAR. The medium resolution LiDAR (9 points/m2) provided elevation and roughness grids sufficiently accurate for hydrodynamic flood mapping of urban and rural floodplains. Low-resolution LiDAR (3 points/m2) is considered adequate for hill catchments. Attention is required where narrow-crested control structures exist. Mapping and upscaling are discussed.https://doi.org/10.1051/e3sconf/20184006031
collection DOAJ
language English
format Article
sources DOAJ
author Smart Graeme
spellingShingle Smart Graeme
LiDAR resolution for catchment-inclusive hydrodynamic models
E3S Web of Conferences
author_facet Smart Graeme
author_sort Smart Graeme
title LiDAR resolution for catchment-inclusive hydrodynamic models
title_short LiDAR resolution for catchment-inclusive hydrodynamic models
title_full LiDAR resolution for catchment-inclusive hydrodynamic models
title_fullStr LiDAR resolution for catchment-inclusive hydrodynamic models
title_full_unstemmed LiDAR resolution for catchment-inclusive hydrodynamic models
title_sort lidar resolution for catchment-inclusive hydrodynamic models
publisher EDP Sciences
series E3S Web of Conferences
issn 2267-1242
publishDate 2018-01-01
description Hydrodynamic models are usually based on LiDAR but there is little information on the LiDAR resolution required for appropriate model accuracy. In this study, algorithms to prepare DEM and roughness grids suitable for hydrodynamic modelling of both catchment and floodplain are applied to low, medium and high point-density LiDAR. The medium resolution LiDAR (9 points/m2) provided elevation and roughness grids sufficiently accurate for hydrodynamic flood mapping of urban and rural floodplains. Low-resolution LiDAR (3 points/m2) is considered adequate for hill catchments. Attention is required where narrow-crested control structures exist. Mapping and upscaling are discussed.
url https://doi.org/10.1051/e3sconf/20184006031
work_keys_str_mv AT smartgraeme lidarresolutionforcatchmentinclusivehydrodynamicmodels
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