@Article{FreitasFreiRosiOliv:2016:DrNeWa,
author = "Freitas, Henrique Renn{\'o} de Azeredo and Freitas, Corina da
Costa and Rosim, S{\'e}rgio and Oliveira, Jo{\~a}o Ricardo de
Freitas",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Drainage networks and watersheds delineation derived from
TIN-based digital elevation models",
journal = "Computers and Geosciences",
year = "2016",
volume = "92",
pages = "21--37",
month = "July",
keywords = "Digital elevation models, Drainage networks, Flat areas, Pits,
Triangulated irregular networks, Watersheds delineation.",
abstract = "Triangulated Irregular Networks (TIN) efficiently define terrain
models from which drainage networks and watersheds can be
extracted with important applications in hydrology. In this work,
the TIN model is represented by a constrained Delaunay
triangulation obtained from contour lines and sampled points.
Paths of steepest descent calculated from the TIN are connected by
processing the triangles according to an associated priority, then
forming a drainage graph structure proposed to generate drainage
networks from accumulated flows. Major problems such as flat areas
and pits that create inconsistencies in the terrain model and
discontinuities in flows are removed with procedures that
interpolate the elevation values of particular points on the TIN.
Drainage networks are defined by arbitrary threshold values, and
their associated watersheds and subwatersheds are then delineated.
TIN results are qualitatively and quantitatively compared to an
available reference drainage network, and also to regular grid
results generated with the TerraHidro system. The drainage
networks automatically obtained from the drainage graph highly
agree to the main courses of water on the terrain, indicating that
the TIN is an attractive alternative terrain model for
hydrological purposes, and that the proposed drainage graph can be
used for the automatic extraction of drainage networks that are
consistent with real-world hydrological patterns.",
doi = "10.1016/j.cageo.2016.04.003",
url = "http://dx.doi.org/10.1016/j.cageo.2016.04.003",
issn = "0098-3004",
language = "en",
targetfile = "freitas_drainage.pdf",
urlaccessdate = "27 abr. 2024"
}