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Original Articles

Stochastic modelling of rainfall occurrences in continuous time

Modélisation stochastique d'occurrences de pluie en temps continu

Pages 437-447 | Received 01 Jul 1987, Accepted 11 Mar 1987, Published online: 24 Dec 2009
 

Abstract

The paper is concerned with the modelling of rainfall occurrence in continuous time. The Alternating Renewal Process is employed for the evaluation of probability distribution functions for total wet and dry periods over a homogeneous time interval (0, t). The derived general solution is simplified by assuming that the individual wet and dry intervals are random variables following an Erlang distribution, in particular an exponential distribution. Data on a continuous time scale from the Mikra Station in Greece are used to illustrate the proposed methodology.

Résumé

Ce rapport examine la modélisation d'occurrences de pluie en temps continu. L'Alternating Renewal Process est employé pour l'évaluation des fonctions de distribution de probabilité de périodes séches totales dans un intervalle de temps homogène (0, t). La solution générale dérivée est simplifiée en faisant l'hypothèse que les intervalles secs et humides sont des variables aléatoires qui suivent une distribution d'Erlang et plus particulièrement une distribution exponentielle. Les donnés en temps continu de la station de Mikra en Grèce sont utilisées pour expliquer par un exemple la méthodologie proposée.

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