Maryland And Delaware. -- Streamflow decreased throughout most of the bi-state area. In Western Maryland and on the upper Potomac River, streamflow decreased, and remained in the normal range. In Central Maryland, flows increased slightly, and moved from the normal range into the above-normal range. On the lower Potomac River, flows decreased, and remained in the normal range. On the Eastern Shore, streamflow decreased, and remained in the above-normal range.
Contents of the Baltimore reservoir system increased, and near month's end were 100 percent of average and 112 percent of last year. End of month contents = 80,690 million gallons.
Ground-water levels increased throughout most of the bi-state area. In western Maryland, ground water levels rose, and moved from the below-normal range into the above-normal range. In west central Maryland, ground water levels decreased, but remained in the below-normal range (below normal since June 1998). In central Maryland, water levels increased, and remained in the above-normal range. On the Eastern Shore, water levels rose, and remained in the above-normal range.
[% = percent; ft³ = cubic feet per second; in. = inches;
Med. = median; Max. = maximum; Min. = minimum; Date = day of month]
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Mean discharge Cumulative runoff
-------------- -----------------------------------
% % Max.
of Runoff of Departure Min. Date
Station name (ft³) Med. (in.) (in.) Med. (in.) (ft³)
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Potomac R at 4170 79 1.50 6.87 61 -4.33 11100 22
Paw Paw, W.Va. 2410 17
Seneca Cr at *212 156 2.34 10.54 121 +1.85 615 18
Dawsonville, Md. 98 15
Potomac R near 16600 103 1.61 7.30 72 -2.80 39900 24
Washington, D.C.(1) 9570 16
Choptank R near *317 189 3.14 14.18 122 +2.58 688 18
Greensboro, Md. 157 15
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(1) Includes diversions for water supply
* Above normal
# Below normal
[Date = month & day]
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Station Feet below land surface datum
------------------------- ----------------------------------------
Number Name Date Level Date Level
------------------------- ----------------------------------------
GA-Bc 1 Accident 03-30 9.91 04-27 8.72
WA-Be 2 Fort Frederick 03-30 27.12 04-28 29.10
MO-Eh 20 Fairland 03-30 10.86 04-28 10.63
Jd 42-03 Camden 03-29 5.80 04-28 5.39
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[ft = feet]
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Water level change (ft) from Last reversal
Water ---------------------------- ----------------------
Name level Average Last Last (ft) Month Year
(Date) (ft) Month Year
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Accident 8.72 +2.30 +1.19 -0.97 +1.19 04 2000
(April 27, 2000)
Ft. Frederick 29.10 -3.74 -1.98 -0.81 -1.98 04 2000
(April 28, 2000)
Fairland 10.63 +0.84 +0.23 +2.61 +2.35 02 2000
(April 28, 2000)
Camden 5.39 +0.47 +1.21 +1.14 +2.57 02 2000
(April 28, 2000)
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Reference period: 1961 to 1990.
April average: 93.5 BGD.
The three largest rivers flowing into the Chesapeake Bay contributed about 85 % of total inflow in April, with individual contributions of:
--------------------------
Susquehanna River 61 %
Potomac River 14 %
James River 10 %
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Total 85 %
Other 15 %
Period of record: 1951 to Present.