1931

Lat.

31.9282

Afghanistan

Helmand

River:

Helmand

Long.

64.7454

Site name:

Shurakian

Contributing area:

56832

km2

Ratio to Comparison Station:

0.54

Latest measurement:

19-Nov-09

Mean annual runoff:

360

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

459

Latest M/C ratio:

0.95

Seven day total:

Estimated current discharge:

408

m3/sec

Percent of mean 7-day total:

97.6

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

Ice-cover determination:

5 yr recurrence flood:

2466

m3/sec

(from Log Pearson III analysis)

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

2402

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Niz. Pjandge (2917950)

Contributing Area:

sq mi

105353

sq km

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

Notes:

Rating equation is based on comparison of monthly means 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)

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

131

2002

no data

21.9

24.3

29.9

25.4

29.2

391

2003

26.1

30.5

35.7

46.0

32.6

31.9

29.9

32.1

26.0

31.1

34.4

34.7

420

2004

30.3

28.2

35.6

34.0

29.6

36.8

39.5

38.8

34.8

32.5

32.1

48.1

412

2005

70.2

52.8

31.5

39.6

32.2

29.8

29.1

29.6

30.0

23.0

18.4

25.6

235

2006

36.6

26.7

20.8

21.5

17.7

17.5

25.5

21.0

21.9

25.8

0.0

341

2007

21.5

17.9

32.5

65.4

32.9

24.2

23.4

26.0

20.8

26.0

25.3

24.8

459

2008

36.2

32.7

50.6

44.6

33.7

25.6

40.2

37.5

37.3

31.3

34.9

54.2

276

2009

34.4

26.2

28.4

21.4

25.7

22.4

22.2

29.3

27.0

23.2

15.9

0.0

Mean Annual Runoff:

376

Standard Deviation:

Trend in Annual Runoff (slope)

-2.27

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