The Heinz Center's State of the Nation's Ecosystems
ecosystem: Freshwater
indicator Name: Changing Stream Flows: Major Changes in High Flow
page # in printed report: 142
location on page: lower
data source: U.S. Geological Survey; analysis by Colorado State University. Coverage: lower 48 states.
notes: please see technical notes for further details on accessing these data from their original source; this data table comes from a specific graphic in The State of the Nation's Ecosystems report (www.heinzctr.org/ecosystems)

units: % of Streams/ Rivers With Major Changes
  increase decrease timing
1970s 12 35.9 41.5
1980s 11.8 38.5 46.9
1990s 30.6 37.7 47.1