Water Resources Review – June 2003

Updated: July 1, 2003

See definitions.

Maryland And Delaware. –  Streamflow increased throughout the entire bi-state area.  In Western Maryland and on the upper Potomac River, streamflow increased, remaining in the above normal range for the fourth consecutive month; a new maximum monthly flow for June was established. In Central Maryland, flows increased, moving from the normal into the above normal range. Flows on the lower Potomac River increased, and remain in the above normal range for the fourth straight month; only flows recorded in June of 1972 (Hurricane Agnes) exceeded this months average.  In northeast Maryland, flows increased, moving from the normal into the above normal range. On the Eastern Shore, streamflow increased, and remains in the above normal range for the fifth consecutive month; a new maximum monthly flow for June was established.

Contents of the Baltimore reservoir system increased slightly, and near month's end were 103 percent of capacity. End of month contents = 78,400 million gallons.  Contents of the Triadelphia  and Duckett reservoirs, near month’s end, were 11.1 billion gallons, 105 percent of capacity.

Surface Water Data ---June 2003

[% = percent; ft³/s = cubic feet per second; in. = inches; Date = day of month;
1 = Includes diversions for water supply; * = Above normal range; # = Below normal range]

Station name

Discharge

Runoff
(in.)

Cumulative runoff

Maximum
(ft3/s)
---
(Date)

Minimum
(ft3/s)
---
(Date)

Mean
(ft3/s)

Percent of
normal

Total
(in.)

Percent of
normal

Departure
(in.)

Potomac R at
Paw Paw, W.Va.

*10500

     441

3.75

23.47

158

+8.57

19300
(4)

  2900

   (30)

Seneca C at
Dawsonville, Md.

  *448

467

4.94

21.95

143

+6.65

   1490
    (14)

   125
   (30)

Potomac R near
Washington, D.C. 1

*42000

453

4.05

22.45

165

+8.85

81200
(5)

13400

(30)

Deer C near 
Rocks, Md.

  *296

239

3.49

18.98

121

+3.28

     722
     (20)

167
(3)

Choptank R near
Greensboro, Md.

 *508

718

5.02

29.86

191

+14.26

    2220
     (21)

    140
    (30)

Normal is defined as the median (50th percentile) of long-term monthly-mean discharge or monthly total runoff. The normal range is defined as discharge or runoff falling between the 75th and 25th percentiles of long-term records. 

Ground Water Data – June 2003

Detailed ground-water information for Maryland and Delaware is available at http://md.water.usgs.gov/groundwater/.

Potomac River near Washington, D.C.  -  June 2003

Last day: 13,400 cubic feet per second (estimated).
Reference period: 1971 to 2000.

Chesapeake Bay – June 2003

Total flow into the Chesapeake Bay was about 123 billion gallons per day, (BGD) 297 percent of average. June average: 41.5 BGD.

****Second highest June  flow to the bay for the period of record;  Highest June flow 221 BGD (1972).

The three largest rivers flowing into the Chesapeake Bay contributed about 85 percent of total inflow in June, with individual contributions of:

River

Percentage of total inflow
to Chesapeake Bay

Susquehanna River

44

Potomac River

26    

James River

                 15

Total

85

Other rivers

15

.

Period of record: 1937 to Present. 

Related Information

Reports for previous months

Monthly Water Conditions in the Chesapeake Bay Region

National Water Conditions

Definitions of terms

Northeast Regional Climate Center (from Cornell University)

Monthly Climate Summary

For additional information, contact:

info@md.water.usgs.gov or call 410-238-4200.