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dc.contributor.author
Jovanovic, Nebo
dc.contributor.author
García, César Luis
dc.contributor.author
Bugan, Richard DH
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Teich, Ingrid
dc.contributor.author
Garcia Rodriguez, Carlos Marcelo
dc.date.available
2018-01-18T20:16:52Z
dc.date.issued
2014-02
dc.identifier.citation
Jovanovic, Nebo; García, César Luis; Bugan, Richard DH; Teich, Ingrid; Garcia Rodriguez, Carlos Marcelo; Validation of remotely-sensed evapotranspiration and NDWI using ground measurements at Riverlands, South Africa; Water Research Commission; Water S.a.; 40; 2; 2-2014; 211-220
dc.identifier.issn
0378-4738
dc.identifier.uri
http://hdl.handle.net/11336/33875
dc.description.abstract
Quantification of the water cycle components is key to managing water resources. Remote sensing techniques and products have recently been developed for the estimation of water balance variables. The objective of this study was to test the reliability of LandSAF (Land Surface Analyses Satellite Applications Facility) evapotranspiration (ET) and SPOT-Vegetation Normalised Difference Water Index (NDWI) by comparison with ground-based measurements. Evapotranspiration (both daily and 30 min) was successfully estimated with LandSAF products in a flat area dominated by fynbos vegetation (Riverlands, Western Cape) that was representative of the satellite image pixel at 3 km resolution. Correlation coefficients were 0.85 and 0.91 and linear regressions produced R2 of 0.72 and 0.75 for 30 min and daily ET, respectively. Ground-measurements of soil water content taken with capacitance sensors at 3 depths were related to NDWI obtained from 10-daily maximum value composites of SPOT-Vegetation images at a resolution of 1 km. Multiple regression models showed that NDWI relates well to soil water content after accounting for precipitation (adjusted R2 were 0.71, 0.59 and 0.54 for 10, 40 and 80 cm soil depth, respectively). Changes in NDWI trends in different land covers were detected in 14-year time series using the breaks for additive seasonal and trend (BFAST) methodology. Appropriate usage, awareness of limitations and correct interpretation of remote sensing data can facilitate water management and planning operations.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Water Research Commission
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Fynbos
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Landsaf Et
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Scintillometry
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Spot-Vegetation Ndwi
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
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Otras Ciencias Biológicas
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
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Ingeniería Medioambiental y Geológica, Geotécnicas
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Ingeniería del Medio Ambiente
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Validation of remotely-sensed evapotranspiration and NDWI using ground measurements at Riverlands, South Africa
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-17T15:02:38Z
dc.identifier.eissn
1816-7950
dc.journal.volume
40
dc.journal.number
2
dc.journal.pagination
211-220
dc.journal.pais
Sudáfrica
dc.journal.ciudad
Petoria, Sud Africa
dc.description.fil
Fil: Jovanovic, Nebo. Natural Resources and Environment; Sudáfrica
dc.description.fil
Fil: García, César Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Católica de Córdoba; Argentina
dc.description.fil
Fil: Bugan, Richard DH. Natural Resources and Environment; Sudáfrica
dc.description.fil
Fil: Teich, Ingrid. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Departamento de Desarrollo Rural. Area de Estadística y Biometría; Argentina
dc.description.fil
Fil: Garcia Rodriguez, Carlos Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba; Argentina
dc.journal.title
Water S.a.
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.ajol.info/index.php/wsa/article/view/101713
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.4314/wsa.v40i2.3
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