San Francisco Bay is one of the world's
largest urbanized estuarine systems with a
watershed that drains about 40 percent of
the State of California. Its freshwater and
saltwater marshes comprise approximately
125 square kilometers (48 square miles),
compared to 2,200 square kilometers (850
square miles) before California began rapid
development in 1850. This staggering reduction
in tidal wetlands of approximately
95 percent has resulted in significant loss .
of habitat for many species of fish and wildlife.
The need for wetlands is well documented-
healthy and adequate wetlands
are critical to the proper functioning of an
estuarine ecosystem like San Francisco Bay.
Additional publication details
USGS Numbered Series
Reclamation of Bay wetlands and disposal of dredge spoils: meeting two goals simultaneously