Streamflow and groundwater levels
were in the normal to above normal
range across Delaware, Maryland, and
the District of Columbia. Precipitation
and temperatures in February were
near normal, following a cold, dry
January. Previous months of above
normal precipitation contributed to
high water levels and two wells were
at the highest February levels in
40 years, according to hydrologists
at the U.S. Geological Survey (USGS).
Groundwater levels are expected to
lower as the growing season approaches
because there is increased water demand
from plants.
USGS
125th Year Anniversary
Today
(March 3) marks the USGS 125th year
anniversary. The USGS has been collecting
data in Maryland for nearly 120 years.
Long-term data collection is essential
to assess long-term trends in water
supply and availability. Streamflow
and groundwater levels are used to
assess the current water conditions
and can be used to predict the potential
for flooding and drought conditions.
For 125 years, the USGS has provided
the Department of the Interior, the
Nation, and the world with the science
needed to make important decisions
and safeguard society. As an unbiased
science organization, USGS scientists
are dedicated to the timely, relevant,
and impartial study of the landscape,
our natural resources, and the natural
hazards that threaten us. The USGS
is one of only a few Federal agencies
that have survived for more than 100
years with its original name and mission
unchanged. The USGS Home Page is assessable
at: http://www.usgs.gov
and is “Your federal source
for science about the Earth, its natural
and living resources, natural hazards
and the environment”.
109
Years of Potomac River Monitoring
The
USGS has kept streamflow records on
the Potomac River at Point of Rocks,
Maryland, since February 1895 (see
graph below). This is believed to
be the oldest USGS stream-gaging station
in continuous operation, and is a
cornerstone in the National network
of more than 7000 stations. Streamflow,
groundwater, and water-quality data
are available for the Nation at: http://nwis.waterdata.usgs.gov/nwis.
Data
from this network have been fundamental
for management of the Nation's water
resources and for evaluation of long-term
concerns such as climate change and
availability of clean water.
Status
of Streams and Wells for February
2004
The
map below shows the wells and streams
used by the USGS to monitor water
conditions in Maryland, Delaware,
and the District of Columbia. In February,
all streams and wells were at normal
(white triangles and circles) or above
normal levels (dark triangles and
circles).
Two
wells in Baltimore and Prince Georges
County, Maryland were at the highest
February level in 40 years (represented
by an asterisk). Water levels at the
well in Prince Georges County have
been at record highs for the last
6 months.
Streamflow
was at normal to above normal levels
for streams in Maryland and Delaware
during February. Monthly data could
not be calculated for several streams
because of ice or malfunctioning equipment
leading to incomplete data, so these
sites are not shown on the map.
Precipitation
February
temperatures and precipitation were
nearly normal in Baltimore, Maryland,
and there was only a trace of frozen
precipitation according to the National
Weather Service. Heavy rainfall in
the beginning of the month led to
high streamflows. Ice remained in
several streams because of the low
temperatures. The cold temperatures
also caused water in the soil to freeze,
and the water (as ice) is essentially
held in storage until it melts and
either recharges aquifers or contributes
flow to streams.
Chesapeake
Bay
Monthly
mean streamflow into the Chesapeake
Bay during February averaged 60.7
bgd (billion gallons per day), which
is only 9 percent below normal. February
was the first month of normal flow
to the Bay since March 2003. Several
months in 2003 were near record-setting
high levels. More information about
USGS studies to help with the protection
and restoration of the Chesapeake
Bay and its watershed can be found
at http://chesapeake.usgs.gov.
Streamflow
Streams
across Maryland and Delaware were
flowing at normal to above normal
levels in February. Streamflow data
in February may have been affected
by ice build-up at the stream-gaging
stations. Five-year monthly streamflow
hydrographs from the USGS stream-gaging
network can be viewed on the USGS
website at http:/md.water.usgs.gov/surfacewater/streamflow/.
Current and historical streamflow
data can be monitored on the web at:
http://waterdata.usgs.gov/.
Daily
streamflow on the Potomac River near
Washington, D.C. in February averaged
16.2 bgd, which is 56 percent above
normal for February. More information
on the Potomac River is available
at: http://md.water.usgs.gov/monthly/poto.html
.
Groundwater-Unconfined
or Shallow Aquifers
Groundwater
levels in the wells used by the USGS
to monitor unconfined or shallow aquifer
response to climatic conditions in
the bi-state region were at normal
to above normal levels during February.
Although many water levels dropped
in February, wells in Baltimore and
Prince Georges Counties, Maryland,
were at the highest February level
in 40 years. This is the sixth consecutive
month of record-setting high groundwater
levels for Prince Georges County.
For 5-year hydrographs of groundwater
levels for the climatic indicator
wells, visit: http://md.water.usgs.gov/groundwater/.
Groundwater-Confined
or Deep Aquifers
Although
water is plentiful at the surface
(streams, reservoirs, and shallow
groundwater reserves are full), some
of the deep confined aquifers used
for water supply by many people living
in southern and eastern Maryland and
Delaware continue to decline. The
water levels continue to decline because
they are being pumped at rates higher
than deep groundwater is recharged
and since the confined aquifers are
deep, water levels in confined aquifers
take longer to respond to climatic
conditions than shallow aquifers.
Confined aquifer wells are measured
monthly and can be viewed at . Thttp://md.water.usgs.gov/groundwaterwo
wells in the confined Aquia aquifer
in Calvert County, Maryland now have
real-time water-level data collection.
These can be viewed at: http://waterdata.usgs.gov/md/nwis/gw
.
Reservoir
Storage
Contents
of the Baltimore reservoir system
remained at 100 percent capacity.
Storage in the Triadelphia and Duckett
Reservoirs on the Patuxent River,
which serves Montgomery and Prince
Georges Counties, has decreased 2
percent to 93 percent of capacity.
Water
Monitoring
The
USGS has been collecting National
streamflow data for 120 years, since
1884. Streamflow monitoring began
on the Potomac River at Point of Rocks,
Maryland in 1895 and continues today.
Streamflow and groundwater levels
are used to assess the current water
conditions and can be used to predict
the potential for flooding and drought
conditions. These USGS data have been
provided to State and local water
resource managers and are critical
for making appropriate decisions on
water regulation. For more information
on streamflow and groundwater levels
in Maryland, Delaware, and the District
of Columbia, visit Water Watch at:
http://md.water.usgs.gov/waterwatch/.
The
real-time streamflow stations used
in this analysis are operated in cooperation
with the Maryland and Delaware Geological
Surveys, the Maryland State Highway
Administration, the U.S. Army Corps
of Engineers, the Maryland Department
of Natural Resources, the Maryland
Department of the Environment, Baltimore
County, Baltimore City, and other
agencies. The observation wells used
in this analysis are operated in cooperation
with the Maryland and Delaware Geological
Surveys. The real-time wells are operated
in cooperation with the Maryland and
Delaware Geological Surveys, the Interstate
Commission on the Potomac River Basin,
and Calvert County, Maryland. The
USGS publishes data for 137 streamflow
stations and 389 observation wells
across Delaware, Maryland, and the
District of Columbia.
The
USGS serves the Nation by providing
reliable scientific information to
describe and understand the Earth;
minimize loss of life and property
from natural disasters; manage water,
biological, energy, and mineral resources;
and enhance and protect our quality
of life.
Recently
Released USGS Report
The
report titled “Lithologic Coring
in the Lower Anacostia Tidal Watershed,
Washington, D.C., July 2002”
examines nonpoint-source contamination
from groundwater and how it affects
the lower tidal Anacostia River. Lithologic
cores were collected from within and
near the river channel in an area
that has been subjected to more than
200 years of urbanization and anthropogenic
modifications. Characteristics of
the cores were consistent with the
types of depositional environments
that could be inferred from available
maps and literature. The report is
available on the web at: http://md.water.usgs.gov/publications/ofr-03-318/.
*
* * USGS * * *
In-depth
information about USGS programs may
be found on the USGS home page at
http://www.usgs.gov
and http://chesapeake.usgs.gov/
for Chesapeake Bay activities.
|
Archived
News Releases 2000-Present |
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2003
- 02-04-2004
Cold, Dry January Leads
to Drop in Water Levels
- 01-06-2004
Wettest Year Leads to Record-High
Water Levels Including Third
Highest Flow to Chesapeake
Bay in December and 2003
- 12-04-2003
More Record-High Water Levels
in November 2003
- 11-04-2003
Record High Groundwater
Levels in October 2003
- 10-03-2003
Flow to Chesapeake Bay in
Water Year 2003 Second Highest
Since 1937
- 09-05-2003
Third Consecutive Month
of High Flow into the Chesapeake
Bay
- 08-06-2003
Flow into Chesapeake Bay
near Record High Levels
- 07-07-2003
Record Breaking High Water
Levels in Maryland and Delaware
- 06-06-2003
Streamflow and Groundwater
Levels High in May
- 05-07-2003
April Water Levels Normal
- 04-05-2003
Water Levels High in March
- Water Restrictions Lifted
- 03-05-2003
Exceptionally Wet February
Leads to High Water Levels
- 02-06-2003
Maryland and Delaware Streamflow
and Groundwater Levels Remain
Normal in January 2003
- 01-07-2003
2002: A Record-Setting Year
for Low Groundwater Levels
- Water Levels Recover to
Normal in December 2002
2002
- 12-01-2002
Hydrologic Drought Wanes
as Water Levels Rise
- 11-01-2002
Water Levels Rise Across
Maryland and Delaware,
But Drought Persists in
Some Areas
- 10-03-2002
Water Levels Remain at Record-Setting
Lows
-
09-05-2002
Groundwater in Parts of
Maryland Reaches Lowest
Levels Since 1962, Despite
Late August Rains
-
08-06-2002
Drought Conditions Lead
to 10 Record Low Monthly
Groundwater Levels in July
- 07-03-2002
Record Low Water Levels
Show the Effects of Long-Term
Hydrologic Drought
- 06-04-2002
Groundwater Levels Reflect
Long-Term Effects of Drought
- 05-02-2002
April Showers Not Enough
to Raise Groundwater Levels
- 04-05-2002
The Drought in Full Bloom:
Low Water Levels Result
in Water Restrictions
2001
- 12-03-2001
Record Low Water Levels
Set in November
- 11-02-2001
Dry October Leads to
Low Water Levels
- 10-05-2001
Water Levels Low in Northern
Maryland
- 09-07-2001
Water Levels Stable in August
- 08-06-2001
High and Low Water Levels
in July
- 07-06-2001
Water Levels Continued to
Improve in June
- 06-06-2001
Needed Rain Helps Avert
a Drought in May
- 05-08-2001
Water Levels Still Normal
in April, but More Rain
is Needed
- 04-05-2001
Spring Rains Help Water
Levels
- 03-06-2001
Water Levels Improve, But
Are Still Below Normal
- 02-06-2001
Streamflow Still Low in
Maryland in January
- 01-05-2001
Streamflow to Chesapeake
Bay in 2000 Reflects Dry
Autumn
2000
- 12-05-2000
Streamflow in Maryland Beginning
to Show the Effects of Lack
of Rain
- 11-07-2000
Despite Lack of Rain October
Water Conditions near Normal
- 10-06-2000
September Water Conditions
Above Normal in Maryland,
Delaware, and D.C.
- 09-08-2000
August Water Conditions
Above Normal in Maryland,
Delaware, and D.C.
- 08-07-2000
July Water Conditions Continue
Normal in Maryland, Delaware,
and D.C.
- 07-07-2000
June Water Conditions Normal
in Maryland, Delaware, and
D.C.
- 06-06-2000
Water conditions begin to
decline in Maryland, Delaware,
and D.C.
- 05-05-2000
Water Conditions Continue
to Improve in Maryland,
Delaware, and D.C.
- 04-07-2000
Water Conditions Continue
to Improve in Maryland,
Delaware, and D.C.
- 03-07-2000
Water Conditions Improving
in Maryland, Delaware, and
D.C.
- 02-08-2000
January Streamflow and Ground
Water Levels Still Low
- 01-06-2000
1999 Flow Into Chesapeake
Bay Lowest Since 1960s Drought
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