Principal component analysis applied to a time series of MODIS images: the spatio-temporal variability of the Pantanal wetland, Brazil

Almeida, Teodoro Isnard Ribeiro de; Penatti, Natasha Costa; Ferreira, Laerte Guimarães; Arantes, Arielle Elias; Amaral, Cibele Hummel do

doi:10.1007/s11273-015-9416-4

Cited by 36 publications

(31 citation statements)

References 20 publications

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“…The geological lineaments ( Figure 9) with northeast-southwest trends are aligned with the Transbrasiliano fault system described by Soares et al (1998), and the north-northwest-south-southeast follows the Pantanal southern border basement orientation and normal faults, which separate the Paraguay River plain from the Urucum plateau (Assine et al, 2015b). Geological lineaments and faults are also found in other regions of the Pantanal, mainly in the Taquari, Cuiabá, and São Lourenço megafans and in the Paraguay trunk plain (Paranhos-Filho et al, 2013;Almeida et al, 2015Almeida et al, , 2019Assine et al, 2015b;Pupim et al, 2017;Oliveira et al, 2018). Recent earthquakes registered in both Pantanal and Chaco basins are the results of uniform compressional stresses in the east-west direction (Dias et al, 2016).…”

Section: Interplay Of Autogenic and Allogenic Factorssupporting

confidence: 75%

“…Previously mapped as an ecotone (Loureiro et al, 1982), this pristine area is only accessed by boats due to the absence of roads. Elevation varies from 100 to 95 m from east to west, with The lake is almost completely covered by macrophytes, growing on or below the water surface line and forming floating mats ('camalotes') and floating meadows ('baceiros') (Pivari et al, 2008;Evans and Costa, 2013;Almeida et al, 2015). Elevation varies from 100 to 95 m from east to west, with The lake is almost completely covered by macrophytes, growing on or below the water surface line and forming floating mats ('camalotes') and floating meadows ('baceiros') (Pivari et al, 2008;Evans and Costa, 2013;Almeida et al, 2015).…”

Section: Permanently Flooded Area: a Hidden Lakementioning

confidence: 99%

“…Contrasting river styles and channel arrangements resulting from changes in water discharge, sediment load, sediment type, and gradient are affected by both the tectonics and climate (Schumm et al, 2000). Shifts in channel patterns are constant and widely recorded in the Pantanal wetland, due to climatic variations, tectonic conditioning, or both (Assine and Silva, 2009;Merino et al, 2013;Kuerten et al, 2013;Macedo et al, 2014;Almeida et al, 2015;Pupim et al, 2017). Shifts in channel patterns are constant and widely recorded in the Pantanal wetland, due to climatic variations, tectonic conditioning, or both (Assine and Silva, 2009;Merino et al, 2013;Kuerten et al, 2013;Macedo et al, 2014;Almeida et al, 2015;Pupim et al, 2017).…”

Section: Interplay Of Autogenic and Allogenic Factorsmentioning

confidence: 99%

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Hidden in plain sight: How finding a lake in the Brazilian Pantanal improves understanding of wetland hydrogeomorphology

Merino

Assine

2019

Earth Surf Processes Landf

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Wetlands are permanently or seasonally flooded areas which support countless species of plants and animals. The Pantanal, in central-west Brazil is one of the largest freshwater wetlands in the world covering an area of~150 000 km 2 . The relationships between geomorphology, hydrology, sedimentation, and vegetation cover are critical for understanding how the landscape constrains the dynamics of wetlands. We provide a detailed study of the geomorphology and surface hydrology of the Negro River Interfan System (NRIS), in the southern Pantanal, by applying multiple approaches (i.e. remote sensing analysis, geomorphological zonation and hydrosedimentological surveys). A multitemporal analysis of Landsat imagery produced an inundation frequency map (2000-2011 period) that revealed a permanently flooded area in the central portion of the NRIS. A hidden fluvial lake was previously undetected due to the accumulation of floating mats and floating meadows of macrophytes. The Negro and Aquidauana feeder rivers exhibit remarkable differences in channel planform, water discharge, and sediment load. The Negro River presents a distributary pattern with marginal levees with decreasing elevation as it progrades into the lake and remains as a subaqueous landform conditioning the water flow downstream. The lake outflow to the Paraguay River occurs mainly by sheet flow during flood seasons and through small tributary channels during dry months. The lake's geometry is outlined by east-northeast and west-northwest straight borders, suggesting that the area is tectonically controlled. A cloud-based worldwide water surface database revealed frequent channel changes within the NRIS. Recent channel avulsions in the lower course of the Negro River are noteworthy mainly because the former river channel at the confluence with the Paraguay River is no longer connected with the Negro River channel.

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Section: Interplay Of Autogenic and Allogenic Factorssupporting

confidence: 75%

Section: Permanently Flooded Area: a Hidden Lakementioning

confidence: 99%

Section: Interplay Of Autogenic and Allogenic Factorsmentioning

confidence: 99%

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Hidden in plain sight: How finding a lake in the Brazilian Pantanal improves understanding of wetland hydrogeomorphology

Merino

Assine

2019

Earth Surf Processes Landf

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“…It has the capacity to study simultaneously numerous water bodies over a large area, has the potential to scale-up in-situ data, and can provide retrospective information on wetland evolution using time series of medium resolution sensors [21][22][23][24]. The Landsat satellites have been acquiring images with comparable sensors from 1972 to the present [25].…”

Section: Introductionmentioning

confidence: 99%

Effect of Protection Level in the Hydroperiod of Water Bodies on Doñana’s Aeolian Sands

2016

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Mediterranean temporary ponds on Doñana's aeolian sands form an extensive system of small dynamic water bodies, dependent on precipitation and groundwater, of considerable importance for biodiversity conservation. Different areas of the aeolian sands have received different levels of environmental protection since 1969, and this has influenced the degree of conservation and the flooding dynamic of these temporary surface waters. We use the Landsat series of satellite images from 1985 to 2014 to study the temporal dynamic of small temporary water bodies on the aeolian sands in relation to the protection level and to distance to water abstraction pressures from agriculture and residential areas. The results show that even with small and ephemeral water bodies optical remote sensing time-series are an effective way to study their flooding temporal dynamics. The protected areas of the aeolian sands hold a better preserved system of temporary ponds, with a flooding dynamic that fluctuates with precipitation. The unprotected area shows an increase in mean hydroperiod duration, and surface flooded, and a decline in hydroperiod variability. This seems to be due to the creation of irrigation ponds and the artificialization of the flooding regime of the natural temporary ponds, that either receive excess irrigation water or dry-up due to the lowering of the groundwater table level. Although a decline in hydroperiod duration of temporary ponds is seen as negative to the system, an increase in hydroperiod of surface waters due to artificialization, or a decline in variability cannot be considered as positive compensatory effects.

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“…In fact, PC1 often expresses the most cumulative information from the dataset [30]. The similarity between the map of average ET and the scores of PC1 suggest that PC1 mainly reflects the mean behaviour of ET in the river basin.…”

Section: First Principal Component: Mean Behaviour Of Etmentioning

confidence: 92%

Evaluation of Spatio-Temporal Patterns of Remotely Sensed Evapotranspiration to Infer Information about Hydrological Behaviour in a Data-Scarce Region

Wambura

Dietrich

Lischeid

2017

Water

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Information about the hydrological behaviour of a river basin prior to setting up, calibrating and validating a distributed hydrological model requires extensive datasets that are hardly available for many parts of the world due to insufficient monitoring networks. In this study, the focus was on prevailing spatio-temporal patterns of remotely sensed evapotranspiration (ET) that enabled conclusions to be drawn about the hydrological behaviour and spatial peculiarities of a river basin at rather high spatial resolution. The prevailing spatio-temporal patterns of ET were identified using a principal component analysis of a time series of 644 images of MODIS ET covering the Wami River basin (Tanzania) between the years 2000 and 2013. The time series of the loadings on the principal components were analysed for seasonality and significant long-term trends. The spatial patterns of principal component scores were tested for significant correlation with elevations and slopes, and for differences between different soil texture and land use classes. The results inferred that the temporal and spatial patterns of ET were related to those of preceding rainfalls. At the end of the dry season, high ET was maintained only in areas of shallow groundwater and in cloud forest nature reserves. A region of clear reduction of ET in the long-term was related to massive land use change. The results also confirmed that most soil texture and land use classes differed significantly. Moreover, ET was exceptionally high in natural forests and loam soil, and very low in bushland and sandy-loam soil. Clearly, this approach has shown great potential of publicly available remote sensing data in providing a sound basis for water resources management as well as for distributed hydrological models in data-scarce river basins at lower latitudes.

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Principal component analysis applied to a time series of MODIS images: the spatio-temporal variability of the Pantanal wetland, Brazil

Cited by 36 publications

References 20 publications

Hidden in plain sight: How finding a lake in the Brazilian Pantanal improves understanding of wetland hydrogeomorphology

Hidden in plain sight: How finding a lake in the Brazilian Pantanal improves understanding of wetland hydrogeomorphology

Effect of Protection Level in the Hydroperiod of Water Bodies on Doñana’s Aeolian Sands

Evaluation of Spatio-Temporal Patterns of Remotely Sensed Evapotranspiration to Infer Information about Hydrological Behaviour in a Data-Scarce Region

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