Review of global change pressures on Urban Water Cycle Systems. Assessment of TRUST Pilots

Abstract

The design of appropriate tools to deal with future stresses requires an understanding of the potential pressures, either opportunities or threats. This report identifies and describes different pressures of critical importance for the water sector, taking into account that global trends often take diverse forms and have dissimilar impacts on a local scale. Chapter 1 introduces the UWCS components and the sustainability approach considered in this context. In Chapter 2 the different pressures affecting UWCS are framed according to the sustainability dimensions: environmental, social and economic. A general description of relevant pressures is presented in terms of context situation, geographic dependency and expected tendencies for the future. Chapter 3 identifies possible future trends on UWCS according to those pressures. Their consideration will allow many countries to undergo considerable changes and to define strategies to solve impending problems and exploit emerging opportunities. Based on the identified trends for the water sector, Chapter 4 presents the prediction of major global change pressures and its impacts on Pilots of TRUST. The two annexes of this report present the principal climatic drivers, in terms of the future projection of weather variables (precipitation and temperature) in the areas of the TRUST pilot cities