Site ID: 205 Lat. 26.7361 India Bihar
River: Gandak Long. 84.3668
Site name: Bettiah Contributing area: 40223 km2 Ratio to Comparison Station: 0.08
Latest measurement: 29-Jul-10 Mean annual runoff: 240 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 35.0 mm
Latest M/C ratio: 1.10 Seven day total: 0.0 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 100.0 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 2744 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2880 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Pakse (2469260)           Contributing Area:   sq mi 536010 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Calibration to nearby ground station has not yet been accomplished.
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
61 2002 no data no data no data no data no data no data no data 14.0 20.2 23.6 2.4 0.9
376 2003 0.2 2.3 20.4 11.0 10.4 16.9 0.2 63.6 134.6 90.1 22.1 4.6
132 2004 1.1 5.5 13.2 10.6 10.9 4.3 3.9 7.7 41.6 29.2 3.1 1.0
162 2005 0.4 2.9 13.0 3.2 2.5 5.1 1.7 27.8 50.5 37.4 11.7 6.1
135 2006 3.1 5.9 9.7 10.4 6.1 0.2 0.2 23.9 39.4 36.0 0.0 0.0
395 2007 3.3 9.5 19.0 13.9 3.7 7.6 3.5 76.0 121.9 83.3 40.3 12.6
258 2008 7.6 10.9 18.9 16.3 23.3 10.7 0.5 40.5 67.1 49.2 9.5 3.5
219 2009 1.1 6.6 14.5 6.4 18.7 15.1 0.4 53.4 49.6 45.4 6.0 2.3
35 2010 1.1 3.3 11.8 6.4 5.5 6.6 0.2 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 240 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  5.9
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Explanation:   Green line records upwelling microwave emission from within 5 km radius of a calbration land target; blue line is emission from within 5 km radious of the measurement target centered over the river.
Brown line is their ratio (M/C; scale on right) and is used to estimate river discharge via a rating equation.
Rating equations are being developed and applied on an individual basis. For calibration status, see "notes" entry, above.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 3
23-Jul-02 3
24-Jul-02 3
25-Jul-02 3
26-Jul-02 209
27-Jul-02 209
28-Jul-02 181
29-Jul-02 60
30-Jul-02 184
31-Jul-02 184
1-Aug-02 183
2-Aug-02 529
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 628
10-Aug-02 628
11-Aug-02 3
12-Aug-02 3
13-Aug-02 3
14-Aug-02 3
15-Aug-02 3
16-Aug-02 3
17-Aug-02 3
18-Aug-02 3
19-Aug-02 141
20-Aug-02 198
21-Aug-02 187
22-Aug-02 146
23-Aug-02 144
24-Aug-02 148
25-Aug-02 326
26-Aug-02 422
27-Aug-02 485
28-Aug-02 485
29-Aug-02 644
30-Aug-02 567
31-Aug-02 622
1-Sep-02 523
2-Sep-02 343
3-Sep-02 601
4-Sep-02 720
5-Sep-02 481
6-Sep-02 433
7-Sep-02 158
8-Sep-02 370
9-Sep-02 558
10-Sep-02 494
11-Sep-02 597
12-Sep-02 172
13-Sep-02 172
14-Sep-02 175
15-Sep-02 175
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 815
22-Sep-02 786
23-Sep-02 664
24-Sep-02 464
25-Sep-02 354
26-Sep-02 3
27-Sep-02 3
28-Sep-02 3
29-Sep-02 3
30-Sep-02 346
1-Oct-02 363
2-Oct-02 326
3-Oct-02 475
4-Oct-02 564
5-Oct-02 401
6-Oct-02 415
7-Oct-02 135
8-Oct-02 153
9-Oct-02 141
10-Oct-02 251
11-Oct-02 233
12-Oct-02 276
13-Oct-02 506
14-Oct-02 546
15-Oct-02 546
16-Oct-02 553
17-Oct-02 595
18-Oct-02 445
19-Oct-02 465
20-Oct-02 428
21-Oct-02 311
22-Oct-02 414
23-Oct-02 212
24-Oct-02 418
25-Oct-02 348
26-Oct-02 336
27-Oct-02 405
28-Oct-02 240
29-Oct-02 297
30-Oct-02 99
31-Oct-02 99
1-Nov-02 3
2-Nov-02 30
3-Nov-02 37
4-Nov-02 108
5-Nov-02 159
6-Nov-02 85
7-Nov-02 166
8-Nov-02 32
9-Nov-02 80
10-Nov-02 87
11-Nov-02 102
12-Nov-02 117
13-Nov-02 3
14-Nov-02 3
15-Nov-02 3
16-Nov-02 3
17-Nov-02 14
18-Nov-02 28
19-Nov-02 3
20-Nov-02 3
21-Nov-02 3
22-Nov-02 3
23-Nov-02 3
24-Nov-02 3
25-Nov-02 3
26-Nov-02 3
27-Nov-02 3
28-Nov-02 24
29-Nov-02 3
30-Nov-02 3
1-Dec-02 3
2-Dec-02 3
3-Dec-02 3
4-Dec-02 3
5-Dec-02 3
6-Dec-02 3
7-Dec-02 3
8-Dec-02 3
9-Dec-02 40
10-Dec-02 72
11-Dec-02 65
12-Dec-02 3
13-Dec-02 27
14-Dec-02 27
15-Dec-02 12
16-Dec-02 106
17-Dec-02 3
18-Dec-02 3
19-Dec-02 3
20-Dec-02 3
21-Dec-02 3
22-Dec-02 3
23-Dec-02 3
24-Dec-02 3
25-Dec-02 3
26-Dec-02 3
27-Dec-02 3
28-Dec-02 3
29-Dec-02 3
30-Dec-02 3
31-Dec-02 3
1-Jan-03 3
2-Jan-03 3
3-Jan-03 3
4-Jan-03 3
5-Jan-03 3
6-Jan-03 3
7-Jan-03 3
8-Jan-03 3
9-Jan-03 3
10-Jan-03 3
11-Jan-03 3
12-Jan-03 3
13-Jan-03 3
14-Jan-03 3
15-Jan-03 3
16-Jan-03 3
17-Jan-03 3
18-Jan-03 3
19-Jan-03 3
20-Jan-03 3
21-Jan-03 3
22-Jan-03 3
23-Jan-03 3
24-Jan-03 3
25-Jan-03 3
26-Jan-03 3
27-Jan-03 3
28-Jan-03 3
29-Jan-03 3
30-Jan-03 3
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
3-Feb-03 36
4-Feb-03 36
5-Feb-03 16
6-Feb-03 28
7-Feb-03 21
8-Feb-03 36
9-Feb-03 59
10-Feb-03 36
11-Feb-03 36
12-Feb-03 3
13-Feb-03 3
14-Feb-03 3
15-Feb-03 28
16-Feb-03 51
17-Feb-03 78
18-Feb-03 107
19-Feb-03 3
20-Feb-03 3
21-Feb-03 3
22-Feb-03 5
23-Feb-03 3
24-Feb-03 32
25-Feb-03 42
26-Feb-03 86
27-Feb-03 173
28-Feb-03 122
1-Mar-03 208
2-Mar-03 118
3-Mar-03 145
4-Mar-03 165
5-Mar-03 213
6-Mar-03 262
7-Mar-03 276
8-Mar-03 276
9-Mar-03 3
10-Mar-03 78
11-Mar-03 38
12-Mar-03 47
13-Mar-03 62
14-Mar-03 112
15-Mar-03 191
16-Mar-03 264
17-Mar-03 325
18-Mar-03 381
19-Mar-03 358
20-Mar-03 406
21-Mar-03 517
22-Mar-03 538
23-Mar-03 562
24-Mar-03 562
25-Mar-03 682
26-Mar-03 606
27-Mar-03 579
28-Mar-03 545
29-Mar-03 379
30-Mar-03 282
31-Mar-03 300
1-Apr-03 276
2-Apr-03 252
3-Apr-03 247
4-Apr-03 406
5-Apr-03 413
6-Apr-03 430
7-Apr-03 572
8-Apr-03 251