Flooded-area satellite monitoring within a Ramsar wetland Nature Reserve in Argentina
Abstract: The protection and restoration of water-related ecosystems is one of the goals to be achieved by the United Nations’ 2030 Agenda for Sustainable Development. In this framework and requested by government Argentine institutions concerned with water, biodiversity and territorial management...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Elsevier
2019
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| Acceso en línea: | https://repositorio.uca.edu.ar/handle/123456789/9005 |
| Aporte de: |
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I33-R139123456789-9005 |
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| record_format |
dspace |
| institution |
Universidad Católica Argentina |
| institution_str |
I-33 |
| repository_str |
R-139 |
| collection |
Repositorio Institucional de la Universidad Católica Argentina (UCA) |
| language |
Inglés |
| topic |
HUMEDALES BIODIVERSIDAD AGUA ECOSISTEMA RESERVAS NATURALES MEDIO AMBIENTE |
| spellingShingle |
HUMEDALES BIODIVERSIDAD AGUA ECOSISTEMA RESERVAS NATURALES MEDIO AMBIENTE Ferral, Anabella Luccini, Eduardo Aleksinkó, Alejandro Scavuzzo, Carlos M. Flooded-area satellite monitoring within a Ramsar wetland Nature Reserve in Argentina |
| topic_facet |
HUMEDALES BIODIVERSIDAD AGUA ECOSISTEMA RESERVAS NATURALES MEDIO AMBIENTE |
| description |
Abstract: The protection and restoration of water-related ecosystems is one of the goals to be achieved by the United
Nations’ 2030 Agenda for Sustainable Development. In this framework and requested by government Argentine
institutions concerned with water, biodiversity and territorial management, this study analyzes the evolution of
the flooded area within the Dulce River wetlands and Mar Chiquita Lake Nature Reserve (centered around 30.6°S,
62.6°W, 70m above sea level) in Argentina since 2003, when the historical maximum extent was reached, until
2017. The Modified Normalized Difference Water Index (MNDWI) was calculated on atmospherically corrected
NASA Landsat 5 Thematic Mapper (L5-TM) and Landsat 8 Operational Land Imager (L8-OLI) reflectance data
over two-scene cloudless-sky mosaics to cover the whole Reserve. Mixed-water pixels constituted an important
fraction of the total-water covered area, particularly during years of minimum water level in Mar Chiquita Lake.
So, MNDWI values were analyzed along transects crossing two stable regional water bodies to determine precise
thresholds for detection of non-water (MNDWI < −0.15 for L5-TM, MNDWI < −0.35 for L8-OLI), mixedwater
(−0.15 < MNDWI < 0.4 for L5-TM, −0.35 < MNDWI < 0.5 for L8-OLI) and open-water
(0.4 < MNDWI for L5-TM, 0.5 < MNDWI for L8-OLI) pixels. A higher spatial resolution image, SPOT5-HGR2,
was used to validate the classification method. A confusion matrix was built which resulted in an overall accuracy
of 99.2% and a Kappa coefficient of 0.98. In-situ Geo-referenced photographic registers were also taken
simultaneously to a Landsat 8 overpass to confirm the classification thresholds. The analysis of simulated
MNDWI response, by using the assumption of the linear mixture model, showed that mixed pixels should present
from 9% to 76% of detectable open-water area. Maximum total flooded area extensions of about 3600 km2 by
2003–2005 and a minimum one of 2050 km2 by the end of 2011 were established, followed by a recent trend to
the recovering with a total flooded area of about 3400 km2 in the period 2015–2017. Open-water covered area
follows closely the behavior of in-situ water level measurements of Mar Chiquita Lake, showing a maximum in
year 2003 and a minimum towards the end of 2013, in a significant linear relation from which a topographical
slope of the terrain of about 0.012% is inferred that agrees with previous bathymetric studies. Results show the
powerful complement between a reliable water satellite monitoring tool and locally-measured parameters in so
dynamic wetland regions. |
| format |
Artículo |
| author |
Ferral, Anabella Luccini, Eduardo Aleksinkó, Alejandro Scavuzzo, Carlos M. |
| author_facet |
Ferral, Anabella Luccini, Eduardo Aleksinkó, Alejandro Scavuzzo, Carlos M. |
| author_sort |
Ferral, Anabella |
| title |
Flooded-area satellite monitoring within a Ramsar wetland Nature Reserve in Argentina |
| title_short |
Flooded-area satellite monitoring within a Ramsar wetland Nature Reserve in Argentina |
| title_full |
Flooded-area satellite monitoring within a Ramsar wetland Nature Reserve in Argentina |
| title_fullStr |
Flooded-area satellite monitoring within a Ramsar wetland Nature Reserve in Argentina |
| title_full_unstemmed |
Flooded-area satellite monitoring within a Ramsar wetland Nature Reserve in Argentina |
| title_sort |
flooded-area satellite monitoring within a ramsar wetland nature reserve in argentina |
| publisher |
Elsevier |
| publishDate |
2019 |
| url |
https://repositorio.uca.edu.ar/handle/123456789/9005 |
| work_keys_str_mv |
AT ferralanabella floodedareasatellitemonitoringwithinaramsarwetlandnaturereserveinargentina AT luccinieduardo floodedareasatellitemonitoringwithinaramsarwetlandnaturereserveinargentina AT aleksinkoalejandro floodedareasatellitemonitoringwithinaramsarwetlandnaturereserveinargentina AT scavuzzocarlosm floodedareasatellitemonitoringwithinaramsarwetlandnaturereserveinargentina |
| bdutipo_str |
Repositorios |
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