Site ID:

135

Lat.

29.0001

China

Hunan

River:

Yuan

Long.

111.8464

Site name:

Changde

Contributing area:

74615

km2

Ratio to Comparison Station:

3.21

Latest measurement:

22-Nov-09

Mean annual runoff:

453

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

488

Latest M/C ratio:

1.53

Seven day total:

Estimated current discharge:

1827

m3/sec

Percent of mean 7-day total:

130.2

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

Ice-cover determination:

5 yr recurrence flood:

2404

m3/sec

(from Log Pearson III analysis)

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

2372

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Tokwe Confluence D/s C/s (1495240)

Contributing Area:

7280

sq mi

23237

sq km

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

Notes:

Comparison station is placeholder, only; this site is not yet calibrated to actual discharge

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

168

2002

no data

36.4

33.1

37.2

29.5

31.3

435

2003

32.1

28.1

31.2

30.1

41.5

34.6

41.8

48.9

35.9

42.5

29.6

38.8

446

2004

33.3

37.9

34.7

34.2

37.2

31.9

35.9

40.7

37.0

40.9

43.5

38.7

470

2005

39.1

31.0

41.4

36.1

37.8

36.1

34.5

47.2

43.6

42.3

41.3

39.7

411

2006

26.4

32.7

36.8

32.9

39.7

44.0

44.7

52.0

51.1

50.6

0.0

501

2007

33.6

37.7

38.1

36.0

29.8

33.7

60.3

67.1

45.4

47.2

42.2

30.4

488

2008

25.4

22.6

28.9

40.6

31.9

29.8

52.9

63.2

59.5

47.1

50.4

35.9

463

2009

34.1

27.4

33.6

41.0

29.6

33.7

60.0

60.9

51.9

50.2

40.7

0.0

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