Ce travail étudie l’impact de la cyberlangue, induite par le développement des technologies de l’InfoCom, sur les situations de communication médiatisée, jusqu’à la ritualisation des interactions sur les dispositifs sociotechniques.Ce travail mobilise un pluralisme théorique et méthodologique, une approche quantitative et typologique. Il s’appuie sur un terrain de données nativement numériques sur un forum de discussion en ligne, dans le domaine de la téléréalité. En appui sur les concepts de langue et langage, réduction de l’incertitude, cyberlangue, dispositif, communauté, réseau, rites et ritualités, et sur les théories de la conversation, du lien social, du lien rituel, de la «posture intentionnelle » et les rites d’interaction en ligne, une étude exploratoire permet d’identifier des procédés d’écriture élaborés et créatifs et d’établir une typologie enrichie des marqueurs de la cyberlangue.Dans une enquête, la confrontation des usages aux représentations permet de comprendre la perception de la cyberlangue par les internautes. Dans les micro-communautés identifiées par la mesure des interactions, la présence des interacteurs, le poids et la concentration des marqueurs cyberlangue et la polarité du discours interactionnel, l’étude de situations rituelles permet d’identifier une typologie de rites d’interaction associés à certains marqueurs cyberlangue et de corréler les potentialités de pacification de la cyberlangue aux intentionnalités de distanciation et de compensation des interacteurs, dans une dynamique de coconstruction pour le maintien du lien social. / This study examines the impact of cyberlanguage, induced by the development of InfoCom technologies, on mediated communication situations, up to the ritualization of interactions on socio-technical devices. This work mobilizes a theoretical and methodological pluralism, a quantitative and typological approach. It relies on a native digital data field on an online discussion forum, in the field of reality show. In support of the concepts of language, reduction of uncertainty, cyber-language, device, community, network, rites and rituals, and the theories of conversation, social bond, ritual bond, "intentional posture" and online interaction rites, an exploratory study identifies elaborate and creative writing processes and establishes an enriched typology of cyberlanguage markers.In a survey, the confrontation of uses with representations makes it possible to understand the perception of the cyberlanguage by Internet users. In the micro-communities identified by the interactions measurements, the presence of interactors, the weight and concentration of cyberlanguage markers and the polarity of the interactional discourse, the study of ritual situations makes it possible to identify a typology of associated interaction rituals to certain cyberlanguage markers and to correlate the pacification potential of the cyberlanguage with the intentional distancing and compensation of the interactors, in a dynamics of coconstruction for the maintenance of the social bond.

[Truncated abstract] The use of uncertainty analysis is gaining considerable attention in catchment hydrological modeling. In particular, the choice of an appropriate model structure, the identifiability of parameter values, and the reduction of model predictive uncertainty are deemed as essential elements of hydrological modelling. The chosen model structure must be parsimonious, and the parameters used must either be derivable from field measured data or inferred unambiguously from analysis of catchment response data. In this thesis, a long-term water balance model for the Susannah Brook catchment in Western Australia has been pursued using the ?downward approach?, which is a systematic approach to determine the model with the minimum level of complexity, with parameter values that in theory are derivable from existing physiographic data relating to the catchment. Through the analysis of the rainfall-runoff response at different timescales, and the exploration of the climate, soil and vegetation controls on the water balance response, an initial model structure was formulated, and a priori model parameter values estimated. Further investigation with the use of auxiliary data such as deuterium concentration in the stream and groundwater level data exposed inadequacies in the model structure. Two more model structures were then proposed and investigated through formulating alternative hypotheses regarding the underlying causes of observed variability, including those associated with the absence of a contribution of deep groundwater flow to the streamflow, which was indicated by deuterium concentration and internal dynamics characterized by the observed groundwater levels. ... These differences are due to differences in the time delay between rainfall and recharge between upland and riparian regions. The ages of water recharging the groundwater and discharging from the catchment were estimated by assuming a piston flow mechanism. In the deeper, upland soils, the age of recharging water was considerably larger than the unsaturated zone delay would suggest; a recharge response 16 days after an infiltration event may involve water as much as 160 days old. On the other hand, the delay and the age of recharging water were much lower in the shallow riparian zone. Where the upland zone contributes significantly to discharge, the predicted difference between the rainfall-discharge response time and the average age of discharging water can be significant.