The progressive installation of a cassette tape recorder in the EDF network of rainfall recorders (150 units of apparatus) : - solves economically the problem of long recording (one to two months) in remote places, and - allows for the automation of computerised files on rainfall in six minute time steps The knowledge of rainfall using so small a time unit has a wide range of uses, including among other things, analysis of : - the fine chronological structure of showers to examine more thoroughly the Gradex hypothesis adopted for extreme rainfall conditions, over a few hours or for a whole day ; - the influence of the chronological irregularity of showers on the instantaneous flow coefficient in the rain/flow relation; - measurement quality improvement by allowing for an adjustment linked to intensity to offset the inherent loss of the recorder. Examples are given of the processing of recent recordings.
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Les précipitations en 6 minutes. Premier examen de quelques mois d'enregistrement sur cassette magnétique
Study of the initial 6 minutes of rainfall recordings
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