Paving the Way for Climate-Resilient Infrastructure - UN CC:Learn

Chapter 6: Internalization of Climate Risks in the Context of Planning and Urban DevelopmentFigure 6.8: Climate models applied to different areas of Mexico City (right) and summary ofmodel results indicating likely impacts of climate change in these areas (left)Source: Escolero et al. (2009).Integrated approachLocal authorities in Mexico City have addressed flooding and water supply as separate problems. However,an integrated perspective of water problems in Mexico City shows linkages among these problems thatcan lead to very different alternatives for a long-term solution in the context of climate change. The interconnectionsamong water drainage, water supply, and urbanization are illustrated in Figure 6.9. This figurehighlights the need for a multidimensional approach to resolve water issues in Mexico City. This holisticview can stimulate the intersectoral approach necessary for adequate infrastructure design and investments,not only under present conditions, but also for future responses (six to seven decades).A critical step is transforming stormwater floods to being part of a long-term solution for water shortagesin Mexico City. Aquifer protection is likely the best alternative to secure present and future water supply inMexico City. Harvesting rainwater within the urban area can increase the recharge of the aquifer. Severalcities have alternatives to capture rainwater within the urban area to reduce pressure on the stormwatersystem and facilitate the reuse of water (Pauleit and Duhme, 2000). Capturing stormwater and using it torecharge the aquifer can help the Mexico City solve two of its major problems. It would also strengthen itsresilience to climate change and become an important part of its adaptation strategy. The implications of76Paving the Way for Climate-Resilient Infrastructure: Conference Proceedings