Jean Rousselle

An Application of the Statistical DownScaling Model (SDSM) to Simulate Climatic Data for Streamflow Modelling in Québec

General Circulation Models (GCMs) are widely used tools to assess potential impacts of global climate warming. However, their outputs are difficult to use in regional impact studies with regard to water resources because of their coarse spatial resolution. Downscaling techniques have emerged as useful tools to reduce the problem of discordant scales by deriving regional climate information from global climate data. The objective of this study is to test the capability of one of these techniques, the Statistical DownScaling Model (SDSM), to derive local scale temperature and precipitation data series that can be used as inputs to a hydrologic model for streamflow modelling. Three river basins located in the province of Québec are analyzed. Results show that the SDSM provides reasonable downscaling data when using predictors representing the observed current climate. However, the performance is less reliable when using GCM predictors.

Vers une gestion durable et intégrée des eaux pluviales : Application des propositions d’action publique au Québec

Le rejet non controle des eaux pluviales est une importante cause de la degradation de la qualite de l’environnement, notamment au niveau de la nappe phreatique, des milieux recepteurs et des habitations. L’analyse de l’etat actuel de la gestion des eaux pluviales au Quebec montre l’existence de certaines lacunes dans la conception des reseaux de drainage urbain, avec des exigences et des attentes de plus en plus larges de la part des citoyens ainsi que des nouveaux defis associes au developpement durable. Il devient donc urgent de mettre en place une nouvelle approche pour gerer de maniere durable et integree la question du drainage urbain dans le contexte specifique quebecois. Le present article offre une revue succincte de la litterature, une analyse exhaustive des pratiques de gestion optimale (PGO) applicables pour le Quebec et une strategie de controle des volumes de ruissellement des eaux pluviales. Il decrit huit propositions d’action publique elaborees pour une gestion durable et integree de ces ...

Représentation stochastique des dommages dans les plaines inondables

The development of river basins subject to inundation requires a proper method of estimating possible damage resulting from a flood with a given return period.In the present study, a distribution function is developed, with the capability of providing an acceptable estimation of possible damage which may be incurred during a known flood.Based on the theory of extreme values in stochastic processes, a distribution function for the damage suffered is derived, assuming that the values of the extremes of exceedances are independant and identically distributed in the time interval (0, t] for a given year and season.

Vers une gestion durable et intégrée des eaux pluviales: Une étude de cas pour le Québec

Pour inciter les professionnels quebecois engages dans la gestion durable et optimale des eaux pluviales a cibler des objectifs clairs, huit propositions d’action publique, de meme qu’une demarche methodologique sommaire pouvant aider a utiliser ces propositions de maniere avisee et responsable, ont ete suggerees dans l’article complementaire. Le present article traite d’une etude de cas ou les huit propositions ont ete appliquees dans un secteur en developpement residentiel d’une municipalite quebecoise, en suivant la methodologie proposee. L’objectif principal du present article est de montrer la faisabilite d’utiliser de nouvelles pratiques de gestion optimale (PGO) des eaux pluviales au Quebec. L’analyse economique sommaire, decrite seulement a titre indicatif dans cet article, montre que l’implantation de quelques PGO applicables au Quebec sur la base d’objectifs precis de gestion integree et durable, est realisable et meme rentable. Une analyse technique poussee reste toutefois necessaire pour ident...

Method for consequence curves as applied to flood risks

This article summarises research intended to expand current study methodologies targeting flood risks with regard to specific issues and emergency preparedness requirements of municipalities. Various methods are currently available to predict the consequences of flooding risks. DOMINO is one such tool used to study flooding risks from natural events or from potential dam breaks. A complementary tool, CONSEQ, was developed to compute the impacts and present them in the form of consequence curves. This tool uses a specific method to assess all tangible and direct damages from exceptional flooding. However, intangible damages and the needs of municipalities downstream of the facility will also be taken into account. This article presents the DOMINO and CONSEQ tools as well as the methodology used to study consequences in relation to these analytical tools. It also describes the requirements of municipal emergency managers in order to draw consequence curves.