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Etude et realisation d' un collecteur-echantillonneur automatique d' eau de pluie.
1994
Le Quere J. | Renard D.
An empirical method to estimate ozone AOT40 values from measurements by passive samplers
2002
Gerosa, G. (Universita di Milano, Milano (Italy)) | Ferretti, M. | Buffoni, A. | Petriccione, B. | Pompei, E.
Passive samplers offer considerable advantages for measuring ozone (O3) concentrations in remote areas. Measurements with passive samplers typically result in data about weekly-to-monthly O3 concentrations, which are not consistent with the definitions of cumulative indices currently being used to estimate the exposure of vegetation to O3. For this reason, attempts were and are being made to develop statistical and empirical methods to estimate exposure indices like the AOT40 adopted in Europe (O3 Accumulated Over Threshold 40 ppb) starting from mean concentrations obtained from passive samplers. This paper describes an empirical method adopted in Italy to estimate 1996-2000 AOT40 values at 20 forest sites of the Italian network of intensive monitoring of forest ecosystems
Show more [+] Less [-]Narrow-band spectral indices for foliage loss of Norway spruce (Picea abies [L.] Karst.) estimation
2002
Rasi, R. (Forest Research Institute, Zvolen (Slovak Republic))
The spectral reflectance curves give important information about investigated objects. High-resolution laboratory spectroradiometric measurements were used to investigate the spectral reflectance properties of spruce twigs with various foliage loss. The spectral reflectance was measured in the range from 400 nm to 1100 nm wavelength with 2 nm spectral sampling interval. Measurements of spectral reflectance were obtained using a LI-COR spectroradiometer LI-1800 equipped with standard 1/2 mm monochromator exit slit measuring 6 nm bandwidth and its external integrating sphere covered with barium sulphate inside
Show more [+] Less [-][Fluorimeter: a new tool for in-situ measurement]
1997
Ramsay, L.
[Study and realization of a rainwater sampling device]
1994
Le Quere, J. (Universite de Paris 7 (France). Laboratoire de Chimie Minerale des Milieux Naturels) | Renard, D.
[Experiences with a proton precision magnetometer to detect pollution]
1995
Thomsen, O.C. | Frederiksen, K.M.
[Influence of water sampling equipment on quality of samples]
1993
Skovbjerg, H. | Ingerslev, M. | Holm, S.
Equipment for measuring the flow of the drainage pipe
2011
Nicolescu, C., The National Research-Development Institute for Optoelectronics, Bucharest (Romania) | Sovăială, G., The National Research-Development Institute for Optoelectronics, Bucharest (Romania) | Matache, G., The National Research-Development Institute for Optoelectronics, Bucharest (Romania) | Mardare, F., The National Research-Development Institute for Land Reclamation, Bucharest (Romania) | Bucur, D., University of Agricultural Sciences and Veterinary Medicine, (Romania) | Maksimović, L., Institute of Field and Vegetable Crops, Novi Sad (Serbia) | Marinescu, A., The National Research-Development Institute for Optoelectronics, Bucharest (Romania). Branch the Research Institute for Hydraulics and Pneumatic of Bucharest
After the year 2000 the issue of a water qualitative and quantitative monitoring increased in importance as a consequence of the provisions of the Framework Directive 2000/60/EC. In this context agriculture is required to use more efficiently the unconventional sources of water. In the enclosures located at the scientific bases from the Danube meadow during the vegetation period from April to September the natural risk factors alternate, being represented by the hydric excess, mainly generated by phreatic excess, and the deficit of humidity from June to August (14, 15). In these conditions the engineering works performed are complex, being required a sizing for mixt task 0 controlled discharge and supply (2, 3, 10, 13). For finding the volume of water resource which transits the drainage works and the capacity of transport it is required to be known first the flow of the absorbent drain.
Show more [+] Less [-]System Edisol and its measurement of CO2 flux between spruce stand and canopy layer of the atmosphere
1999
Havrankova, K. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny)