Validation of Spectral Moisture Indexes Using Landsat 8 OLI/TIRS Images in a Vertisol/Validacion de indices espectrales de humedad mediante imagenes del Landsat 8 OLI/TIRS en un Vertisol

Remote sensing is a geomatic tool that has been used to determine soil moisture, a very important physical property in studies related to agricultural production. Particularly, the Vertisol present distinctive characteristics to other groupings of soils in Cuba in relation to water retention and the...

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Veröffentlicht in:Revista ciencias técnicas agropecuarias 2023-10, Vol.32 (4), p.1
Hauptverfasser: Garcia-Reyes, Roberto Alejandro, Villazon-Gomez, Juan Alejandro, Ruiz-Perez, Maria Elena, Cruz-Perez, Mirna
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Sprache:spa
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Zusammenfassung:Remote sensing is a geomatic tool that has been used to determine soil moisture, a very important physical property in studies related to agricultural production. Particularly, the Vertisol present distinctive characteristics to other groupings of soils in Cuba in relation to water retention and the change of their properties. The objective of the research was validating the use of spectral moisture indexes through Landsat 8 OLI/TIRS images in a Vertisol. An area under natural grass, sugarcane and secondary forest of the Provincial Sugarcane Research Station in Guaro, Holguin was chosen. Three georeferenced random sampling points were established for each land use up to a depth of 30.0 cm, for the determination of gravimetric moisture, which was related by means of linear regression analysis with the spectral indexes of moisture and the calculation of parameters for validation. The use of remote sensing showed in the thematic maps obtained from the estimation of moisture with the different spectral indexes, the presence of homogeneous zones and their spatial variability in the moisture state of the Vertisol under the three land uses. ENDWI, MSI and EMSI indexes indicated a better estimation in the statistics used for the validation of the values obtained by remote sensing and in situ sampling of moisture, according to research related to the subject. Keywords: Gravimetric moisture, Remote Sensing, Soil. La teledeteccion es una herramienta geomatica que ha sido utilizada para determinar la humedad del suelo, propiedad fisica muy importante en estudios relacionados con la produccion agropecuaria. Particularmente, los Vertisoles presentan caracteristicas distintivas a otros agrupamientos de suelos en Cuba con relacion a la retencion de agua y el cambio de sus propiedades. El objetivo de la investigacion se baso en validar el uso de indices espectrales de humedad mediante imagenes del Landsat 8 OLI/TIRS en un Vertisol. Se escogio un area bajo pasto natural, cana de azucar y bosque secundario de la Estacion Provincial de Investigaciones de la Cana de Azucar en Guaro, Holguin. Se establecieron tres puntos de muestreo aleatorios georreferenciados por cada uso de la tierra hasta una profundidad de 30,0 cm, para la determinacion de la humedad gravimetrica la cual, se relaciono mediante analisis de regresion lineal con los indices espectrales de humedad y el calculo de parametros para su validacion. El uso de la teledeteccion mostro en los mapas tematicos obtenidos
ISSN:1010-2760