Site ID:

2559

Lat.

13.3828

El Salvador

River:

Lempa

Long.

-88.7223

Site name:

Contributing area:

20747

km2

Ratio to Comparison Station:

0.41

Latest measurement:

12-Oct-09

Mean annual runoff:

584

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

980

Latest M/C ratio:

1.12

Seven day total:

Estimated current discharge:

896

m3/sec

Percent of mean 7-day total:

144.4

(today's value compared to mean for same period, 2003-2007)

Ice-cover determination:

5 yr recurrence flood:

1755

m3/sec

(from Log Pearson III analysis)

Status Codes: 1 = Low flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood

1604

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Boca del Cerro (4362600)

Contributing Area:

sq mi

50458

sq km

(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)

Notes:

Discharge calibration based on comparison of monthly means (maximum flows, minimum flows and mean discharge) from a station in the region

Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)

(For U.S, sites, nearby ground station discharge may also be shown)

2008-Present

2002-Present

Annual

Monthly Total Runoff (mm), computed from above satellite-based discharge data

Runoff

(mm)

Jan

Feb

Mar

April

May

June

July

Aug

Sept

Oct

Nov

Dec

2002

no data

0.0

2003

0.0

2004

0.0

526

2005

0.0

6.6

75.7

80.9

11.4

0.0

58.1

56.5

69.7

74.7

92.5

269

2006

39.7

0.0

76.4

88.9

64.5

0.0

958

2007

95.2

58.1

84.8

74.4

65.4

78.0

71.6

82.9

75.2

75.8

85.4

110.7

980

2008

106.5

91.1

82.3

58.7

49.8

78.6

72.8

67.9

67.6

104.1

96.7

104.3

690

2009

83.8

66.7

77.0

78.4

44.5

73.1

63.1

83.5

79.2

40.5

0.0

Mean Annual Runoff:

683

Standard Deviation:

443

Trend in Annual Runoff (slope)

205.1

Discharge is estimated directly via a rating equation from the remote sensing data (M/C ratio) shown below.