Evaluating hydrological and socio-economic impacts of green/blue space projects for storm water management = Evaluation des effets hydrologiques et socioéconomiques des espaces verts/bleus pour la gestion des eaux de pluie

FR: Les régions et villes européennes doivent faire face à des nombreuses questions liées à l'eau :gestion des eaux pluviales, qualité de l'eau, impact des sécheresses sur les milieux aquatiques. Pourrépondre durablement à ces questions, il est évident que l'eau doit être intégrée dans ledéveloppement urbain et dans les politiques d'aménagement du territoire. L'objectif général du projetpour la coopération interrégionale Aqua-Add (Mieux intégrer l'eau dans les projets urbains) est dedéployer le potentiel de l'eau dans les paysages urbains (potentiel économique, social etenvironnemental). Dans ce contexte, l'approche hydrologique et un modèle hédonique des prix sontintégrés et appliqués afin de vérifier les effets hydrologiques et socio-économiques des différentessolutions pour la gestion des eaux de pluie, et de faciliter le débat avec les acteurs de l'aménagement.L'objectif de cette étude est d'évaluer les effets hydrologiques et socio-économiques des espacesverts/bleus pour la gestion des eaux de pluie dans les villes moyennes. Nous présentons et étudionsici plus particulièrement l'étude de cas de Imperia (Italie)European regions and cities face important challenges related to water management, includingstorage, discharge, quality and periodic stress. To address these challenges, it is evident that watermust become an integral part of urban planning policies and their implementation. The internationalco-operation project Aqua-Add (Deploying the added value of water in local and regionaldevelopment) aims to deploy the potential of 'water' (economically, socially and environmentally) inurbanized landscapes and to improve the implementation of water measures in local and regionalurban planning. In this framework, hydrologic and hedonic-pricing simulation modelling approachesare integrated and applied in order to demonstrate the potential environmental, social and economicimpacts of different water management scenarios as well as to facilitate more informed decisionmaking across stakeholders. The objective of this paper is to assess the hydrological as well as socioeconomic implications of green/blue space projects for storm water management in medium-sizedcities. In particular, the case study of Imperia (Italy) is here presented and discussed

Nanofriction mechanisms derived from the dependence of friction on load and sliding velocity from air to UHV on hydrophilic silicon

This paper examines friction as a function of the sliding velocity and applied normal load from air to UHV in a scanning force microscope (SFM) experiment in which a sharp silicon tip slides against a flat Si(100) sample. Under ambient conditions, both surfaces are covered by a native oxide, which is hydrophilic. During pump-down in the vacuum chamber housing the SFM, the behavior of friction as a function of the applied normal load and the sliding velocity undergoes a change. By analyzing these changes it is possible to identify three distinct friction regimes with corresponding contact properties: (a) friction dominated by the additional normal forces induced by capillarity due to the presence of thick water films, (b) higher drag force from ordering effects present in thin water layers and (c) low friction due to direct solid-solid contact for the sample with the counterbody. Depending on environmental conditions and the applied normal load, all three mechanisms may be present at one time. Their individual contributions can be identified by investigating the dependence of friction on the applied normal load as well as on the sliding velocity in different pressure regimes, thus providing information about nanoscale friction mechanisms