Site ID: 2100 Lat. 29.0352 China Zhejiang
River: Qu Long. 119.1119
Site name: Longyu Contributing area: 11089 km2 Ratio to Comparison Station: 0.39
Latest measurement: 21-Jul-10 Mean annual runoff: 1155 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 753.6 mm
Latest M/C ratio: 1.21 Seven day total: 22.3 mm
Estimated current discharge: 396 m3/sec Percent of mean 7-day total: 110.7 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1241 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1237 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Boluo (2186950)           Contributing Area:   sq mi 28239 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Final calibration to discharge 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
407 2002 no data no data no data no data no data no data no data 14.9 30.9 45.0 146.2 170.1
1471 2003 157.7 156.8 144.6 157.4 147.3 113.8 169.6 72.7 49.7 94.1 67.6 139.8
1353 2004 82.3 130.5 105.8 180.2 160.5 107.5 134.5 66.9 58.1 82.3 120.1 124.5
1192 2005 120.9 140.9 166.7 181.1 123.2 94.5 104.8 12.0 9.9 21.2 98.8 117.8
975 2006 91.7 90.6 136.5 188.1 148.4 98.1 89.7 39.2 39.9 53.2 0.0 0.0
1083 2007 118.1 114.6 115.1 169.4 124.0 79.0 76.3 25.9 31.3 51.2 84.5 93.9
947 2008 59.6 75.3 126.9 105.5 123.1 69.6 78.6 27.1 17.0 60.2 98.9 105.0
1065 2009 88.0 91.5 119.8 152.8 110.1 98.8 109.3 31.9 14.3 36.3 90.3 122.4
754 2010 113.9 119.7 167.0 155.6 114.1 25.1 58.3 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 1155 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  -73
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Green line records upwelling microwave emission from within 5 km radius of a calbration land target. 
Explanation:   Blue line is emission from within 5 km radius of the measurement target centered over the river.
Brown line is their ratio (M/C; "HR" in Brakenridge et al 2007; 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 using available ground-based discharge information.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 539
23-Jul-02 539
24-Jul-02 645
25-Jul-02 975
26-Jul-02 925
27-Jul-02 715
28-Jul-02 584
29-Jul-02 412
30-Jul-02 327
31-Jul-02 211
1-Aug-02 196
2-Aug-02 261
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02
10-Aug-02 301
11-Aug-02 135
12-Aug-02 189
13-Aug-02 123
14-Aug-02 6
15-Aug-02 3
16-Aug-02 3
17-Aug-02 3
18-Aug-02 3
19-Aug-02 51
20-Aug-02 3
21-Aug-02 65
22-Aug-02 32
23-Aug-02 3
24-Aug-02 101
25-Aug-02 68
26-Aug-02 134
27-Aug-02 64
28-Aug-02 3
29-Aug-02 11
30-Aug-02 61
31-Aug-02 97
1-Sep-02 104
2-Sep-02 288
3-Sep-02 336
4-Sep-02 433
5-Sep-02 252
6-Sep-02 87
7-Sep-02 155
8-Sep-02 147
9-Sep-02 252
10-Sep-02 284
11-Sep-02 157
12-Sep-02 86
13-Sep-02 63
14-Sep-02 63
15-Sep-02
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 175
22-Sep-02 289
23-Sep-02 325
24-Sep-02 325
25-Sep-02 113
26-Sep-02 3
27-Sep-02 3
28-Sep-02 3
29-Sep-02 3
30-Sep-02 11
1-Oct-02 91
2-Oct-02 164
3-Oct-02 248
4-Oct-02 286
5-Oct-02 281
6-Oct-02 3
7-Oct-02 149
8-Oct-02 193
9-Oct-02 220
10-Oct-02 361
11-Oct-02 290
12-Oct-02 261
13-Oct-02 185
14-Oct-02 112
15-Oct-02 79
16-Oct-02 118
17-Oct-02 29
18-Oct-02 99
19-Oct-02 162
20-Oct-02 157
21-Oct-02 347
22-Oct-02 142
23-Oct-02 100
24-Oct-02 228
25-Oct-02 214
26-Oct-02 228
27-Oct-02 314
28-Oct-02 236
29-Oct-02 138
30-Oct-02 101
31-Oct-02 233
1-Nov-02 345
2-Nov-02 536
3-Nov-02 591
4-Nov-02 628
5-Nov-02 644
6-Nov-02 558
7-Nov-02 805
8-Nov-02 702
9-Nov-02 616
10-Nov-02 657
11-Nov-02 593
12-Nov-02 570
13-Nov-02 607
14-Nov-02 287
15-Nov-02 310
16-Nov-02 190
17-Nov-02 439
18-Nov-02 667
19-Nov-02 893
20-Nov-02 1031
21-Nov-02 755
22-Nov-02 509
23-Nov-02 428
24-Nov-02 571
25-Nov-02 820
26-Nov-02 824
27-Nov-02 969
28-Nov-02 852
29-Nov-02 684
30-Nov-02 678
1-Dec-02 633
2-Dec-02 766
3-Dec-02 691
4-Dec-02 872
5-Dec-02 868
6-Dec-02 921
7-Dec-02 884
8-Dec-02 588
9-Dec-02 386
10-Dec-02 595
11-Dec-02 705
12-Dec-02 672
13-Dec-02 752
14-Dec-02 805
15-Dec-02 880
16-Dec-02 857
17-Dec-02 774
18-Dec-02 459
19-Dec-02 509
20-Dec-02 623
21-Dec-02 697
22-Dec-02 926
23-Dec-02 942
24-Dec-02 951
25-Dec-02 512
26-Dec-02 586
27-Dec-02 600
28-Dec-02 642
29-Dec-02 725
30-Dec-02 543
31-Dec-02 465
1-Jan-03 163
2-Jan-03 564
3-Jan-03 896
4-Jan-03 818
5-Jan-03 764
6-Jan-03 697
7-Jan-03 569
8-Jan-03 424
9-Jan-03 325
10-Jan-03 362
11-Jan-03 525
12-Jan-03 566
13-Jan-03 617
14-Jan-03 702
15-Jan-03 553
16-Jan-03 607
17-Jan-03 751
18-Jan-03 744
19-Jan-03 1014
20-Jan-03 887
21-Jan-03 804
22-Jan-03 614
23-Jan-03 549
24-Jan-03 612
25-Jan-03 539
26-Jan-03 618
27-Jan-03 731
28-Jan-03 703
29-Jan-03 720
30-Jan-03 825
31-Jan-03 980
1-Feb-03 1119
2-Feb-03 1090
3-Feb-03 1106
4-Feb-03 577
5-Feb-03 627
6-Feb-03 610
7-Feb-03 514
8-Feb-03 613
9-Feb-03 689
10-Feb-03 832
11-Feb-03 378
12-Feb-03 322
13-Feb-03 200
14-Feb-03 250
15-Feb-03 352
16-Feb-03 642
17-Feb-03 757
18-Feb-03 745
19-Feb-03 745
20-Feb-03 707
21-Feb-03 936
22-Feb-03 1337
23-Feb-03 1139
24-Feb-03 1191
25-Feb-03 909
26-Feb-03 605
27-Feb-03 527
28-Feb-03 604
1-Mar-03 381
2-Mar-03 499
3-Mar-03 534
4-Mar-03 209
5-Mar-03 298
6-Mar-03 356
7-Mar-03 356
8-Mar-03 958
9-Mar-03 855
10-Mar-03 782
11-Mar-03 828
12-Mar-03 802
13-Mar-03 867
14-Mar-03 907