21 research outputs found
Medici贸n de la interceptaci贸n de las precipitaciones por la Encina (Quercus Rotundifolia Lam.): metodolog铆a e instrumentalizaci贸n
Este trabajo se centra en la investigaci贸n de la interceptaci贸n de las precipitaciones por el encinar, como uno de los componentes que intervienen en el balance hidrol贸gico de una peque帽a cuenca bajo explotaci贸n de dehesa en la provincia de C谩ceres. Se cuantifica la "precipitaci贸n incidente", la "trascolaci贸n" y la "escorrent铆a cortical" para determinar el volumen de precipitaci贸n que es interceptado por la copa del 谩rbol. Tambi茅n se miden las siguientes variables meteorol贸gicas: temperatura, humedad relativa del aire, radiaci贸n solar, direcci贸n y velocidad del viento para estimar la evapotranspiraci贸n potencial. En este art铆culo se presenta la metodolog铆a utilizada para la realizaci贸n del estudio y se hace una valoraci贸n de la misma.Rainfall interception of holm oaks is investigated as one of the components which interfere in the hydrological balance of a small watershed covered by openly spaced evergreen woodland (dehesa) in the province de C谩ceres, SO Spain. Incident rainfall, throughfall and stemflow are quantified in order to determine interception of individual trees. Meteorological variables, such as temperature, relative air humidity, solar radiation, wind velocity and direction, are measured in order to estimate potential evapotranspiration. This paper presents the methodology used together with a first evaluation
Keck-Nirspec Infrared OH Lines: Oxygen Abundances in Metal-Poor Stars Down to [Fe/H] = -2.9
Infrared OH lines at 1.5 - 1.7 um in the H band were obtained with the
NIRSPEC high-resolution spectrograph at the 10m Keck Telescope for a sample of
seven metal-poor stars. Detailed analyses have been carried out, based on
optical high-resolution data obtained with the FEROS spectrograph at ESO.
Stellar parameters were derived by adopting infrared flux method effective
temperatures, trigonometric and/or evolutionary gravities and metallicities
from FeII lines. We obtain that the sample stars with metallicities [Fe/H] <
-2.2 show a mean oxygen abundance [O/Fe] ~ 0.54, for a solar oxygen abundance
of epsilon(O) = 8.87, or [O/Fe] ~ 0.64 if epsilon(O) = 8.77 is assumed.Comment: To be published in ApJ 575 (August 10
Medici贸n de la interceptaci贸n de las precipitaciones por la Encina (Quercus Rotundifolia Lam.): metodolog铆a e instrumentalizaci贸n
Este trabajo se centra en la investigaci贸n de la interceptaci贸n de las precipitaciones por el encinar, como uno de los componentes que intervienen en el balance hidrol贸gico de una peque帽a cuenca bajo explotaci贸n de dehesa en la provincia de C谩ceres. Se cuantifica la "precipitaci贸n incidente", la "trascolaci贸n" y la "escorrent铆a cortical" para determinar el volumen de precipitaci贸n que es interceptado por la copa del 谩rbol. Tambi茅n se miden las siguientes variables meteorol贸gicas: temperatura, humedad relativa del aire, radiaci贸n solar, direcci贸n y velocidad del viento para estimar la evapotranspiraci贸n potencial. En este art铆culo se presenta la metodolog铆a utilizada para la realizaci贸n del estudio y se hace una valoraci贸n de la misma.Rainfall interception of holm oaks is investigated as one of the components which interfere in the hydrological balance of a small watershed covered by openly spaced evergreen woodland (dehesa) in the province de C谩ceres, SO Spain. Incident rainfall, throughfall and stemflow are quantified in order to determine interception of individual trees. Meteorological variables, such as temperature, relative air humidity, solar radiation, wind velocity and direction, are measured in order to estimate potential evapotranspiration. This paper presents the methodology used together with a first evaluation