Climate Change And Its Implications For New Mexicos Water Resources And Economic Opportunities
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Climate Change and Its Implications for New Mexico's Water Resources and Economic Opportunities
Author | : Brian H. Hurd |
Publisher | : |
Total Pages | : 28 |
Release | : 2008 |
Genre | : Climatic changes |
ISBN | : |
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Social, economic and environmental systems in water-scarce New Mexico and throughout the arid southwest are vulnerable to disruptions in water supplies that are likely to accompany future climate changes. With a particular focus on potential economic consequences for New Mexico, this study uses a hydro-economic model of the Rio Grande watershed to integrate plausible changes in climate with hydrologic responses and water demands within a framework that optimizes water-use allocations for the greatest economic benefit. The study uses three climate change scenarios across two future time periods selected to represent the range of effects indicated by the outputs across eighteen global climate models (GCMs) using the SRES A1B emissions scenario. These six climate change scenarios were then used to model runoff changes using the WATBAL hydrologic model (Yates, 1996), which integrates climate and hydrologic variables, and to change water demand parameters in the hydro-economic model. Primary findings confirm that ecosystems are at greatest risk in New Mexico, followed by agricultural water users, as water is increasingly transferred to maintain urban and industrial users, whose economic productivity is greater. While total annual economic losses are estimated in the vicinity of $300 million, under severe climate changes, where runoff is reduced by nearly 30%, both economic and non-economic losses are likely to be significantly higher. This is due primarily to the effects of some strongly optimistic model assumptions, e.g., assuming no conflicts over water rights or water transfers, and to several significant and valuable omissions in the analysis, e.g., the environmental and social services that agriculture and the environment provide.
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