Improving Future U.S. Drought Assessment (2026)

Chapter: 6 Drought Indicators, Indices, and Nonstationarity

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Previous Chapter: 5 Drought Assessment Data Sources and Nonstationarity
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Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 95 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 96 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 96
Page 97 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 97
Page 98 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 98
Page 99 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 99
Page 100 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 100
Page 101 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 101
Page 102 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 102
Page 103 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 103
Page 104 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 104
Page 105 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 105
Page 106 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 106
Page 107 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 107
Page 108 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 108
Page 109 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 109
Page 110 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 110
Page 111 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 111
Page 112 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 112
Page 113 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 113
Page 114 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 114
Page 115 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 115
Page 116 Cite Bookmark
Suggested Citation: "6 Drought Indicators, Indices, and Nonstationarity." National Academies of Sciences, Engineering, and Medicine. 2026. Improving Future U.S. Drought Assessment. Washington, DC: The National Academies Press. doi: 10.17226/29217.
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Page 116
Next Chapter: 7 Drought Impacts, Impact Data, and Nonstationarity
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