91 research outputs found
Heavy mineral as a tool to refine the stratigraphy of kaolin deposits in the Rio Capim Area, Northern Brazil
AN EXPERIMENTAL STUDY OF TRACE ELEMENT FLUXES FROM SUBDUCTED OCEANIC CRUST
ISSN:0022-3530ISSN:1460-241
Wollen wir die verhaltensauffälligen Schüler wirklich integrieren? Die Einstellung von Österreichern über die schulische Integration von Kindern mit Verhaltensauffälligkeiten
Schwab S. Wollen wir die verhaltensauffälligen Schüler wirklich integrieren? Die Einstellung von Österreichern über die schulische Integration von Kindern mit Verhaltensauffälligkeiten. In: Leonhardt A, Müller K, Truckenbrodt T, eds. Die UN-Behindertenrechtskonvention und ihre Umsetzung. Beiträge zur Interkulturellen und International vergleichenden Heil- und Sonderpädagogik. Bad Heilbrunn: Klinkhardt.; 2015: 249-257
Ein einfaches Näherungsverfahren zum Berechnen der laminaren Reibungsschicht mit Absaugung
Surface moisture and vegetation cover analysis for drought monitoring in the southern Krüger National Park using sentinel-1, sentinel-2, and landsat-8
During the southern summer season of 2015 and 2016, South Africa experienced one of the most severe meteorological droughts since the start of climate recording, due to an exceptionally strong El Niño event. To investigate spatiotemporal dynamics of surface moisture and vegetation structure, data from ESA’s Copernicus Sentinel-1/-2 and NASA’s Landsat-8 for the period between March 2015 and November 2017 were utilized. In combination, these radar and optical satellite systems provide promising data with high spatial and temporal resolution. Sentinel-1 C-band data was exploited to derive surface moisture based on a hyper-temporal co-polarized (vertical-vertical—VV) radar backscatter change detection approach, describing dynamics between dry and wet seasons. Vegetation information from a TLS (Terrestrial Laser Scanner)-derived canopy height model (CHM), as well as the normalized difference vegetation index (NDVI) from Sentinel-2 and Landsat-8, were utilized to analyze vegetation structure types and dynamics with respect to the surface moisture index (SurfMI). Our results indicate that our combined radar–optical approach allows for a separation and retrieval of surface moisture conditions suitable for drought monitoring. Moreover, we conclude that it is crucial for the development of a drought monitoring system for savanna ecosystems to integrate land cover and vegetation information for analyzing surface moisture dynamics derived from Earth observation time series
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