---
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caption: 'Climate change is projected to reduce the ability of ecosystems to supply water in some parts of the country. This is true in areas where precipitation is projected to decline, and even in some areas where precipitation is expected to increase. Compared to 10% of counties today, by 2050, 32% of counties will be at high or extreme risk of watershortages. Projections assume continued increases in greenhouse gas emissions through 2050 and a slow decline thereafter (A1B scenario). Numbers in parentheses indicate number of counties in each category. (Reprinted with permission from Roy et al., 2012.<tbib>1bd31364-5aab-4219-9389-b17fd03daa08</tbib> Copyright 2012 American Chemical Society).'
chapter:
  description: ~
  display_name: 'Chapter 8: Ecosystems, Biodiversity, and Ecosystem Services'
  doi: 10.7930/J0TD9V7H
  identifier: ecosystems
  number: 8
  report_identifier: nca3
  sort_key: 80
  title: 'Ecosystems, Biodiversity, and Ecosystem Services'
  url: http://nca2014.globalchange.gov/report/sectors/ecosystems
chapter_identifier: ecosystems
cited_by: []
contributors: []
create_dt: 2014-03-14T12:46:00
description: 'Climate change is projected to reduce the ability of ecosystems to supply water in some parts of the country. This is true in areas where precipitation is projected to decline, and even in some areas where precipitation is expected to increase. Compared to 10% of counties today, by 2050, 32% of counties will be at high or extreme risk of watershortages. Projections assume continued increases in greenhouse gas emissions through 2050 and a slow decline thereafter (A1B scenario). Numbers in parentheses indicate number of counties in each category. (Reprinted with permission from Roy et al., 2012.<tbib>1bd31364-5aab-4219-9389-b17fd03daa08</tbib> Copyright 2012 American Chemical Society).'
display_name: '8.1: Water Supplies Projected to Decline'
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href: http://52.38.26.42:8080/report/nca3/chapter/ecosystems/figure/water-supplies-projected-to-decline.yaml
identifier: water-supplies-projected-to-decline
images:
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    create_dt: 2014-03-14T12:46:00
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    time_end: 2050-12-31T23:59:59
    time_start: 2050-01-01T00:00:00
    title: 'Water Supplies Projected to Decline - Climate Change Effects'
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    create_dt: 2014-03-14T12:46:00
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    time_end: 2050-12-31T23:59:59
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ordinal: 1
parents: []
references:
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    uri: /reference/1bd31364-5aab-4219-9389-b17fd03daa08
report:
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report_identifier: nca3
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title: Water Supplies Projected to Decline
type: figure
uri: /report/nca3/chapter/ecosystems/figure/water-supplies-projected-to-decline
url: http://nca2014.globalchange.gov/highlights/report-findings/water-supply/graphics/water-supplies-projected-decline
usage_limits: Copyright protected. Obtain permission from the original figure source.