91 documents found, page 1 of 10

Hydrometeorological dataset (2018–2023) from the largest Portuguese reservoir: ...

The databases provided for two meteorological stations installed in the Alqueva reservoir (the largest artificial lake in Europe), one located on a floating platform and the other on the shore (approximately 1 km away in a straight line), cover a period of 6 years, from 2018 to 2023. The data available are, the hourly accumulated precipitation as well as the hourly averages of surface water temperature (0.25 m ...

Moisture Content Vegetation Seasonal Variability Based on a Multiscale Remote S...

Water content is one of the most critical characteristics in plant physiological development. Therefore, this information is a crucial factor in determining the water stress conditions of vegetation, which is essential for assessing the wildfire risk and land management decision-making. Remote sensing can be vital for obtaining information over large, limited access areas with global coverage. This is important...

Assessment of Water Surface Reflectance and Optical Water Types Over Two Decade...

This study focuses on comparing surface reflectances and optical water types (OWTs) obtained in Alqueva reservoir, located in the Alentejo region (Portugal), over a period of two decades (2003–2022) using four datasets: the moderate resolution imaging spectroradiometer (MODIS), themedium-resolution imaging spectrometer, the ocean and land color instrument aboard Sentinel-3, and the multispectral instrument aboa...

Optical study of soil samples contaminated by heavy metals from the São Domingo...

The study of soils contaminated by heavy metals (HMs) is a hard task that implies the collecting of soil samples in an area representative of the contaminated space. For example, for water samples, the law requires the creation of a study grid with 5 ha spacing. Considering this spacing requirement, to the soil from the São Domingos Mine, that have an area of approximately 2000 ha, we need to collect 400 sample...

Livro de Resumos da 11ª Assembleia Luso Espanhola de Geodesia e Geofísica

Livro de Resumos da 11ª Assembleia Luso Espanhola de Geodesia e Geofísica

13º Simpósio de Meteorologia e Geofísica da APMG XXIII Encontro Luso-Espanhol d...

Performance Assessment of IMERG V07 Versus V06 for Precipitation Estimation in ...

Accurate satellite-based precipitation estimates are crucial for climate studies and water resource management, particularly in regions with sparse meteorological station coverage. This study evaluates the improvements of the Integrated Multi-satellite Retrievals for GPM (IMERG) Final Run version 07 (V07) relative to the previous version (V06). The evaluation employed gridded data from the Brazilian Daily Weath...

Projeto ENGAGE: Uma abordagem transdisciplinar para a gestão colaborativa de nu...

As alterações climáticas estão a afetar a dinâmica de nutrientes em bacias hidrográficas, intensificando fenómenos como a poluição difusa e a eutrofização, com impactos diretos na qualidade da água, na integridade dos ecossistemas aquáticos e na resiliência das comunidades humanas. A diversidade regional dos fatores climáticos e antropogénicos que contribuem para a poluição por nutrientes na Europa acentua a co...

Mapping the Mine: Combining Portable X-ray Fluorescence, Spectroradiometry, UAV...

Old and abandoned mines are testimonials of ancient industrial activities, and as such, they are able to convey environmental concerns. A multidisciplinary approach combining ground measurements—i.e., portable X-ray fluorescence and optical spectroradiometry—with airborne multispectral images—i.e., Sentinel-2 and unmanned aerial vehicles—was conducted to define a baseline for the characterization of areas that ...

Assessment and mapping of the solar irradiation in Timor-Leste using ERA5, MERR...

This work is part of the Master's thesis in Solar Energy Engineering and aims to assess and map the solar resource in East Timor. To this end, reanalysis data from ERA5 and MERRA2 were used, involving a grid with an area between 123.75º and 127.5º of longitude, and between -9.5º and -8.0º of latitude over a period of 23 years (2000-2022), as well as Solcast data acquired at 39 points distributed throughout the ...