8 documents found, page 1 of 1
Contribution to the salinization risk assessment, under drought conditions, in ...
Tomaz, Alexandra; Fialho, Sofia; Lima, Ana; Penha, Alexandra; Novais, Helena; Potes, M.; Yakunin, M.; Rodrigues, Gonçalo; Costa, Maria JoãoIn Mediterranean regions, climate changes have increased water limitation for crops, leading to an increase demand for irrigation water. During the hydrological years of 2016 and 2017, Portugal experienced a drought season that has extended throughout almost the entire territory of mainland Portugal reaching the level of severe drought. Under water scarcity conditions and high atmosphere evaporative demand, the...
Measurements of Lake-Atmosphere interactions at Alqueva reservoir
Potes, M.; Salgado, R.; Costa, M. J.The exchanges between lakes and the atmosphere at Alqueva reservoir, Southeast Portugal, are the object of a 2014 Summer experiment described is this work, with special attention to above water, air-water interface and below water measurements. The field campaign take advantage of the floating meteorological stations already established at the Alqueva reservoir. The troposphere and lower stratosphere are charac...
MEDIÇÃO ESPECTRAL DO COEFICIENTE DE ATENUAÇÃO DE ÁGUAS INTERIORES
Potes, M.; Costa, M. J.; Salgado, R.Changes in the water surface composition may affect the optical properties of the water column. In addition, the light penetration in the water body is affected by absorption and scattering processes resulting in spectral intensity changes along the water column. Underwater measurements of spectral downwelling radiance were performed at several depths in order to compute the water column spectral attenuation co...
QUALIDADE DA ÁGUA DA ALBUFEIRA DE ALQUEVA
Potes, M.; Costa, M. J.; Salgado, R.The water quality control of reservoirs is fundamental since these constitute indispensable renewable water resources for a variety of purposes. A feasible low cost approach that allows for, continuously and globally, monitoring water quality bio-optical quantities was developed through the combination of satellite retrieved water surface spectral reflectance and limnological laboratory analyses. The present ap...
CONTRIBUTO DA CLIMATOLOGIA PARA A RECUPERAÇÃO DA RIBEIRA DA PARDIELA
Potes, M.; Salgado, R.; Morais, M.; Amante, V.; Cunha, S.; Pires, V.; Pedro, A.Todos os afluentes do rio Guadiana em território português são rios temporários de características sazonais que apresentam caudal superficial apenas durante os meses com precipitação. Este tipo de sistemas ocorre naturalmente em regiões de clima Mediterrânico e de clima semi-árido, estando também presentes noutras regiões da Europa, normalmente associadas à geologia de características calcárias extremamente per...
Monitorização da qualidade da água de barragens com redes neuronais artificiais
Potes, M.; Costa, M. J.The water quality control of dams is fundamental, since these constitute indispensable renewable water resources for a variety of purposes. A feasible low cost approach for monitoring water quality bio-optical quantities is to use satellite spectral measurements that allow to continuously and globally follow the evolution of the water surface spectral reflectance. The present approach takes advantage of the Med...
Interactions lake-atmosphere: the ALEX 2014 field campaign and numerical simula...
Salgado, R.; Potes, M.; Albino, A.; Apolinário, J.; Barbosa, S.; Bárias, S.; Beliche, P.; Bortoli, D.; Canhoto, P.; Costa, M. J.; Fernandes, R.M.The ALqueva hydro-meteorological EXperiment, ALEX 2014, was an integrated field campaign with measurements of chemical, physical and biological parameters in water and air at different experimental sites in the region of the Alqueva reservoir, a 250 km2 man made lake, in the southeast of Portugal. The Field campaign took place from June 1 to September 30, 2014 and comprises an Intensive Observation Period (IOP)...
The Alqueva hydro-meteorologic experiment
Salgado, R.; Potes, M.; Albino, A.; Apolinário, J.; Barbosa, S.; Bárias, S.; Beliche, P.; Bortoli, D.; Canhoto, P.; Costa, M. J.; Fernandes, R.M.The ALqueva hydro-meteorological experiment, ALEX 2014 (http://www.alex2014.cge.uevora.pt) was an integrated field campaign with measurements of chemical, physical and biological parameters at different experimental sites in the Alqueva reservoir and in its surrounding region. With the main purpose of studing the lake-atmosphere interactions, the ALEX 2014 took place form June to September and comprised a three...