Publications des scientifiques de l'IRD

L'Hôte Yann, Chevallier Pierre, Coudrain Anne, Lejeune Y., Etchevers P. (2005). Relationship between precipitation phase and air temperature : comparison between the Bolivian Andes and the Swiss Alps. Hydrological Sciences Journal = Journal des Sciences Hydrologiques, 50 (6), p. 989-997. ISSN 0262-6667.

Titre du document
Relationship between precipitation phase and air temperature : comparison between the Bolivian Andes and the Swiss Alps
Année de publication
2005
Type de document
Article référencé dans le Web of Science WOS:000233886100006
Auteurs
L'Hôte Yann, Chevallier Pierre, Coudrain Anne, Lejeune Y., Etchevers P.
Source
Hydrological Sciences Journal = Journal des Sciences Hydrologiques, 2005, 50 (6), p. 989-997 ISSN 0262-6667
Determining the precipitation phase-rain or snow-is an important factor in modelling discharge in mountainous basins. In a study carried out in the outer tropical Andes Cordillera of Bolivia, half-hourly determination of precipitation phase was obtained by applying a suitable expert system, taking I I meteorological parameters into consideration that are measured over 21 months at an altitude close to 4800 m. Straightforward relationships between the determined precipitation phase and observed air temperature were analysed in histograms that contain percentage occurrences of snowfall, rainfall and mixed precipitation events for 0.5 degrees C air temperature increments. The graph shows a nearly identical distribution of percentage occurrences of snowfall in the Andes to that on a 1600-m high site in the Swiss Alps. This result suggests that, for hydrological modelling purposes in the outer tropical Andes, the same rain/snow threshold temperature as in the compared Swiss site can be applied.
Plan de classement
Hydrologie [062]
Localisation
Fonds IRD [F B010041223]
Identifiant IRD
fdi:010041223
Contact