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A river runs through it: U.S. cities' waterways show consistent patterns of evolution
Stream restoration involving reconnection of an urban waterway near Baltimore with its floodplain.
Credit: Paul Mayer, U.S. EPA
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Urban landscapes change with human activities such as the creation of stormwater ponds.
Credit: Rose Smith, University of Maryland
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A Maryland State Highway Administration loader moves salt stored for use in winter.
Credit: Maryland Department of Transportation
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Aging sewer lines and erosion of stream banks contribute to water pollution in cities.
Credit: Tamara Newcomer Johnson, University of Maryland
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Algae blooms often occur in urban streams; excess nutrients lead to the blooms.
Credit: USGS
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Extreme heat events affect urban ecosystems in cities such as Phoenix.
Credit: NSF Central Arizona-Phoenix LTER Site
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