Water Resources Review – September 2001

Updated: October 4, 2001

See definitions.

Maryland And Delaware. -- Streamflow decreased throughout the entire bi-state area. In Western Maryland and on the upper Potomac River, streamflow decreased, and moved from the above-normal  into the normal range. In Central Maryland, flows decreased, also moving from the above-normal into the normal range. Flows on the lower Potomac River decreased, and remain in the normal range. In northeast Maryland, flows decreased, and moved from the normal into the below-normal range, after three months of below normal flow. On the Eastern Shore, streamflow decreased, and remained in the normal range.

Contents of the Baltimore reservoir system decreased, and near month's end were 81 percent of capacity. End of month contents = 61,780 million gallons.

Ground-water levels decreased throughout most of the bi-state area. In western Maryland, ground-water levels fell, and moved from the above-normal into the below-normal range. In west-central Maryland, ground-water levels decreased, and moved from the above-normal into the below-normal range. In central Maryland, water levels increased slightly, and remained in the below-normal range. On the Eastern Shore, water levels fell, and remained in the above-normal range.

Surface Water Data -- September 2001

[% = 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.

682

76

0.24

11.43

70

-4.97

1270
(2)

497
(23)

Seneca C at
Dawsonville, Md.

79.4

151

0.88

14.21

78

-3.99

689
(24)

30
(17)

Potomac R near
Washington, D.C. 1

2640

79

0.26

9.76

66

-5.04

10900
(25)

1550
(19)

Deer C near 
Rocks, Md.

#33.5

43

0.40

12.52

63

-7.38

110
(25)

44
(17-19)

Choptank R near
Greensboro, Md.

27.1

90

0.27

20.04

122

+3.64

47
(25)

21
(21)

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 – September  2001

Well number

Well name

Previous month

Reporting month

Date measured

Level
(feet below
land surface)

Date measured

Level
(feet below
land surface)

GA-Bc 1

Accident

08-30

14.25

09-28

14.89

WA-Be 2

Fort Frederick

08-30

33.14

09-28

34.13

MO-Eh 20

Fairland

08-30

14.27

09-28

14.21

Jd 42-03

Camden

08-29

6.38

09-27

7.24

 

Name

Date measured

Water level
(feet below
land surface)

Departure from average
(feet)

Change since previous month
(feet)

Change since previous year
(feet)

Last reversal

Change
(feet)

Date
(month, year)

Accident

09-28

14.89

-0.12

-0.64

+2.13

-2.32

June 2001

Fort Frederick

09-28

34.13

-0.20

-0.99

-1.39

-8.37

Apr 2001

Fairland

09-28

14.21

-0.50

+0.06

-0.96

+0,06

Sept 2001

Camden

09-27

7.24

+0.08

-0.86

-1.48

-2.40

July 2001

Potomac River near Washington, D.C.  -  September 2001

Last day: 2300 cubic feet per second (estimated).
Reference period: 1971 to 2000.

Chesapeake Bay – September 2001

Total flow into the Chesapeake Bay was about 11.7 billion gallons per day, (BGD) 57 percent of average. September average: 20.5 BGD.

The three largest rivers flowing into the Chesapeake Bay contributed about 77 percent of total inflow in September, with individual contributions of:

River

Percentage of total inflow
to Chesapeake Bay

Susquehanna River

47

Potomac River

21

James River

                 9

Total

77

Other rivers

23

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.