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Climate 2017, 5(1), 5; doi:10.3390/cli5010005

Hydroclimatic Characteristics of the 2012–2015 California Drought from an Operational Perspective

Division of Flood Management, California Department of Water Resources, 3310 El Camino Avenue, Sacramento, CA 95821, USA
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Author to whom correspondence should be addressed.
Academic Editor: Christina Anagnostopoulou
Received: 29 November 2016 / Revised: 11 January 2017 / Accepted: 16 January 2017 / Published: 21 January 2017
(This article belongs to the Special Issue Climate Extremes, the Past and the Future)
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Abstract

California experienced an extraordinary drought from 2012–2015 (which continues into 2016). This study, from an operational perspective, reviewed the development of this drought in a hydroclimatic framework and examined its characteristics at different temporal and spatial scales. Observed and reconstructed operational hydrologic indices and variables widely used in water resources planning and management at statewide and (hydrologic) regional scales were employed for this purpose. Parsimonious metrics typically applied in drought assessment and management practices including the drought monitor category, percent of average, and rank were utilized to facilitate the analysis. The results indicated that the drought was characterized by record low snowpack (statewide four-year accumulated deficit: 280%-of-average), exceptionally low April-July runoff (220%-of-average deficit), and significantly below average reservoir storage (93%-of-average deficit). During the period from 2012–2015, in general, water year 2015 stood out as the driest single year; 2014–2015 was the driest two-year period; and 2013–2015 tended to be the driest three-year period. Contrary to prior studies stating that the 2012–2015 drought was unprecedented, this study illustrated that based on eight out of 28 variables, the 2012–2015 drought was not without precedent in the record period. Spatially, on average, the South Coast Region, the Central Coast Region, the Tulare Region, and the San Joaquin Region generally had the most severe drought conditions. Overall, these findings are highly meaningful for water managers in terms of making better informed adaptive management plans. View Full-Text
Keywords: California 2012–2015 drought; hydroclimatic characteristics; operational perspective California 2012–2015 drought; hydroclimatic characteristics; operational perspective
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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He, M.; Russo, M.; Anderson, M. Hydroclimatic Characteristics of the 2012–2015 California Drought from an Operational Perspective. Climate 2017, 5, 5.

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