Site ID: 2219 Lat. 13.5963 Philippines Bicol
River: Bicol Long. 123.1819
Site name: Naga Contributing area: 1870 km2 Ratio to Comparison Station: 0.07
Latest measurement: 13-Jul-10 Mean annual runoff: 8241 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 1882.3 mm
Latest M/C ratio: 1.32 Seven day total: 115.2 mm
Estimated current discharge: 854 m3/sec Percent of mean 7-day total: 45.4 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 3172 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2886 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
558 2002 no data no data no data no data no data no data no data 198.5 26.5 73.0 112.0 147.9
1127 2003 12.9 4.3 4.8 4.6 10.4 165.7 308.4 151.0 4.6 26.6 76.6 357.3
486 2004 10.2 10.7 4.8 4.6 36.4 169.4 35.5 10.0 4.6 63.0 4.6 131.8
7892 2005 75.9 4.3 12.8 14.4 74.3 421.4 603.0 786.3 680.5 559.3 1482.1 3177.4
8770 2006 2687.5 1037.3 347.4 88.5 495.8 1025.4 1204.9 839.6 205.2 838.2 0.0 0.0
11539 2007 2179.7 910.7 119.1 15.1 82.5 1005.4 1682.8 717.5 295.2 549.7 1542.6 2438.9
15193 2008 2234.1 1179.1 1389.1 1602.3 1761.3 1043.5 452.1 453.1 603.6 1077.4 1324.0 2073.7
12682 2009 1839.5 1390.7 495.1 82.3 1248.5 2015.4 1123.5 240.3 249.6 840.4 1464.6 1692.1
1882 2010 964.8 222.1 12.8 25.9 25.7 244.6 386.5 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 8241 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 3
23-Jul-02 3
24-Jul-02 3
25-Jul-02 87
26-Jul-02 257
27-Jul-02 155
28-Jul-02 227
29-Jul-02 131
30-Jul-02 131
31-Jul-02 323
1-Aug-02 323
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 3
10-Aug-02 3
11-Aug-02 3
12-Aug-02 116
13-Aug-02 316
14-Aug-02 715
15-Aug-02 715
16-Aug-02 342
17-Aug-02 300
18-Aug-02 3
19-Aug-02 3
20-Aug-02 3
21-Aug-02 3
22-Aug-02 4
23-Aug-02 3
24-Aug-02 3
25-Aug-02 3
26-Aug-02 60
27-Aug-02 169
28-Aug-02 267
29-Aug-02 548
30-Aug-02 194
31-Aug-02 194
1-Sep-02 3
2-Sep-02 3
3-Sep-02 3
4-Sep-02 3
5-Sep-02 3
6-Sep-02 3
7-Sep-02 3
8-Sep-02 3
9-Sep-02 3
10-Sep-02 3
11-Sep-02 3
12-Sep-02 3
13-Sep-02 3
14-Sep-02 169
15-Sep-02
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02
22-Sep-02 3
23-Sep-02 3
24-Sep-02 3
25-Sep-02 3
26-Sep-02 3
27-Sep-02 3
28-Sep-02 3
29-Sep-02 3
30-Sep-02 336
1-Oct-02 3
2-Oct-02 3
3-Oct-02 3
4-Oct-02 3
5-Oct-02 3
6-Oct-02 3
7-Oct-02 3
8-Oct-02 3
9-Oct-02 199
10-Oct-02 86
11-Oct-02 86
12-Oct-02 35
13-Oct-02 131
14-Oct-02 124
15-Oct-02 119
16-Oct-02 215
17-Oct-02 23
18-Oct-02 23
19-Oct-02 3
20-Oct-02 3
21-Oct-02 3
22-Oct-02 3
23-Oct-02 3
24-Oct-02 3
25-Oct-02 3
26-Oct-02 238
27-Oct-02 238
28-Oct-02 3
29-Oct-02 3
30-Oct-02 3
31-Oct-02 3
1-Nov-02 84
2-Nov-02 3
3-Nov-02 3
4-Nov-02 3
5-Nov-02 3
6-Nov-02 3
7-Nov-02 3
8-Nov-02 3
9-Nov-02 3
10-Nov-02 102
11-Nov-02 3
12-Nov-02 3
13-Nov-02 3
14-Nov-02 3
15-Nov-02 103
16-Nov-02 213
17-Nov-02 417
18-Nov-02 243
19-Nov-02 243
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-02 719
27-Nov-02 117
28-Nov-02 117
29-Nov-02 3
30-Nov-02 3
1-Dec-02 3
2-Dec-02 3
3-Dec-02 542
4-Dec-02 203
5-Dec-02 203
6-Dec-02 206
7-Dec-02 3
8-Dec-02 3
9-Dec-02 3
10-Dec-02 3
11-Dec-02 3
12-Dec-02 502
13-Dec-02 583
14-Dec-02 583
15-Dec-02 10
16-Dec-02 62
17-Dec-02 3
18-Dec-02 3
19-Dec-02 238
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 21
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-03 162
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 3
4-Feb-03 3
5-Feb-03 3
6-Feb-03 3
7-Feb-03 3
8-Feb-03 3
9-Feb-03 3
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23-Feb-03 3
24-Feb-03 3
25-Feb-03 3
26-Feb-03 3
27-Feb-03 3
28-Feb-03 3
1-Mar-03 3
2-Mar-03 3
3-Mar-03 3
4-Mar-03 3
5-Mar-03 3
6-Mar-03 3
7-Mar-03 3
8-Mar-03 3
9-Mar-03 3
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24-Mar-03 3
25-Mar-03 3
26-Mar-03 3
27-Mar-03 3
28-Mar-03 3
29-Mar-03 3
30-Mar-03 3
31-Mar-03 3
1-Apr-03 3
2-Apr-03 3
3-Apr-03 3
4-Apr-03 3
5-Apr-03 3
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8-Apr-03 3
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30-Apr-03 3
1-May-03 3
2-May-03 3
3-May-03 3
4-May-03 3
5-May-03 3
6-May-03 3