Waters of the United States: Maryland
% intermittent/ephemeral streams by watershed
0% - 25%
25% - 50%
50% - 75%
75% - 100%
Gunpowder-Patapsco
Basin Inset Map
Hagerstown
Aberdeen--Havre
de Grace--Bel Air
Frederick
Westminster
Baltimore
Washington
York Lancaster
Intermittent/ephemeral streams
Intermittent/ephemeral
streams
Waters of the United States
Perennial streams
Perennial
streams
Maryland
Aberdeen--Havre
% intermittent/ephemeral streams by watershed
de Grace--Bel Air
0% - 25%
St.
Charles
25% - 50%
50% - 75%
Frederick
75% - 100%
Westminster
Baltimore
Salisbury
York Lancaster
Washington
Intermittent/ephemeral streams
Perennial streams
Aberdeen--Havre
de Grace--Bel Air
In Maryland, 18% of stream miles
within native trout historical range
are classified as intermittent or
In Maryland, 18% of stream miles within native trout historical
range are classified as intermittent or ephemeral. 63% of stream
miles are in headwater streams. In the Gunpowder-Patapsco basin,
24% of streams are intermittent while 65% are headwaters.
Source: USGS, National Hydrography
Dataset Plus, 1:100,000.
:
0
10
20
Miles
30
40