Variation of Leaf Area Index by Remote Sensing and Surface Measurements for a Tropical Savanna

Abstract

Studies of vegetation in parks within the urban perimeter are scarce, since the study of green area dynamics within a city requires high cost and mobility of collection. In this context, remote sensing appears as an ideal tool for the study of vegetation in contrast to anthropic areas. The ceptometer sensor are the most used in leaf area index in spatial analysis, so measurements with this type of sensor can be used to validate remote sensing products for this variable. Thus, the objective of this study was to measure leaf area index (LAI) obtained by orbital sensor in contrast to measurements in loco. Landsat 8 satellite reflectance measurements were used for validation with locally measured data at 30 sample points. The photosynthetically active radiation incident off and below the canopy, as well as the transmittance of the canopy, were measured at the site. The research was carried out in the tropical savanna fragment located in the Mãe Bonifácia park, in the Cuiabá city, Brazil, from October 2014 to