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PROGRAMMES

SUSTAINABLE CITIES

Urban Systems in Areas of Extreme Aridity. Proposals for Sustainable Water Management

2013

Abstract

The objective of this study was to identify the most appropriate actions, from an environmental, social and economic perspective, so the cities of La Paz, Los Cabos, Mexicali, Tecate and Tijuana of the state of Baja California, and Puerto Peñasco from the state of Sonora, may deal with scenarios of less water availability in the 2013-2018 period. The gap between water supply and demand was determined. Subsequently, we analyzed the overview of the working conditions of the operating bodies (OB), as well as measures to close gaps with the main characteristics of such methods.

                It’s estimated that water supply for the six cities will go from 294 million cubic meters (Mm3) in 2013 to 283 Mm3 in 2018 and 258 Mm3 in 2028. This represents a contraction of 36 Mm3, 12 percent of the initial volume.

                In most cases, measures to manage the demand proved to be efficient for closing gaps and less expensive than the options for increasing water supply.

                The methodology used integrates the analysis of events related to climate change (drought) and the economic analysis for mitigating such effects (construction of cost curves for closing gaps). The integration of the two approaches generates valuable information for designing public policies so that decision makers compare different alternatives for mitigating the effects of climate change.

 

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