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Discovery

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.

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 creation of stormwater ponds.

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.

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.

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.

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.

Extreme heat events affect urban ecosystems in cities such as Phoenix.

Credit: NSF Central Arizona-Phoenix LTER Site


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