@Article{MoulatletRenCosEmiSch:2015:GrVaSu,
author = "Moulatlet, G. M. and Renn{\'o}, Camilo Daleles and Costa, F. R.
C. and Emilio, T. and Schietti, J.",
affiliation = "{University of Turku} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas da
Amaz{\^o}nia (INPA)} and {Instituto Nacional de Pesquisas da
Amaz{\^o}nia (INPA)} and {Instituto Nacional de Pesquisas da
Amaz{\^o}nia (INPA)}",
title = "Mapping hydrological environments in central Amazonia: ground
validation and surface model based on SRTM DEM data corrected for
deforestation",
journal = "Earth System Science Data",
year = "2015",
volume = "7",
pages = "29--34",
abstract = "One of the most important freely available digital elevation
models (DEMs) for Amazonia is the one obtained by the Shuttle
Radar Topography Mission (SRTM). However, since SRTM tends to
represent the vegetation surface instead of the ground surface,
the broad use of SRTM DEM as a framework for terrain description
in Amazonia is hampered by the presence of deforested areas. We
present here two data sets: (1) a deforestation-corrected SRTM DEM
for the interfluve between the Purus and Madeira rivers, in
central Amazonia, which passed through a careful identification of
different environments and has deforestation features corrected by
a new method of increasing pixel values of the DEM (Renn{\'o},
2009); and (2) a set of 18 hydrological-topographic descriptors
based on the corrected SRTM DEM. Deforestation features are
related with the opening of an 800 km road in the central part of
the interfluve and occupancy of its vicinity. We used topographic
profiles from the pristine forest to the deforested feature to
evaluate the recovery of the original canopy coverage by
minimizing canopy height variation (corrections ranged from 1 to
38 m). The hydrologicaltopographic description was obtained by the
Height Above the Nearest Drainage (HAND) algorithm, which
normalizes the terrain elevation (above sea level) by the
elevation of the nearest hydrologically connected drainage. The
validation of the HAND data set was done by in situ hydrological
description of 110 km of walking trails also available in this
data set. The new SRTM DEM expands the applicability of SRTM data
for landscape modelling; the data sets of hydrological features
based on topographic modelling are undoubtedly appropriate for
ecological modelling and an important contribution to
environmental mapping of Amazonia. The deforestation-corrected
SRTM DEM is available at
http://ppbio.inpa.gov.br/knb/metacat/naman.318.3/ppbio; the
polygons selected for deforestation correction are available at
http://ppbio.inpa.gov.br/knb/metacat/naman.317.3/ppbio; the set of
hydrologicaltopographic descriptors is available at
http://ppbio.inpa.gov.br/knb/metacat/naman.544.2/ppbio; the
environmental description of access trails is available at
http://ppbio.inpa.gov.br/knb/metacat/naman.541.2/ppbio; and the
limits of deforestation corrections and drainage validation are
available at
http://ppbio.inpa.gov.br/knb/metacat/liliandias.38.1/ppbio.",
doi = "10.5194/essd-7-29-2015",
url = "http://dx.doi.org/10.5194/essd-7-29-2015",
issn = "1866-3508 and 1866-3516",
language = "en",
urlaccessdate = "02 maio 2024"
}