Site ID: 2201 Lat. 17.1794 Philippines Cagayan Valley
River: Cagayan Long. 121.8731
Site name: Ilagan Contributing area: 15268 km2 Ratio to Comparison Station: 0.54
Latest measurement: 12-Jul-10 Mean annual runoff: 797 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 527.9 mm
Latest M/C ratio: 1.30 Seven day total: 29.3 mm
Estimated current discharge: 694 m3/sec Percent of mean 7-day total: 201.5 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1788 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1675 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
189 2002 no data no data no data no data no data no data no data 28.0 33.2 46.0 54.1 28.2
490 2003 35.6 53.1 52.7 51.3 44.1 30.0 34.3 36.3 40.6 43.7 40.2 28.0
460 2004 26.8 45.5 57.2 39.3 46.7 40.6 23.8 31.2 42.4 51.9 33.9 20.4
818 2005 18.3 40.6 59.6 63.2 70.4 89.4 40.8 60.3 68.3 72.8 110.6 123.3
787 2006 114.0 74.4 78.5 68.5 69.2 71.0 70.2 98.3 68.4 74.2 0.0 0.0
970 2007 97.7 74.7 63.2 51.5 76.4 89.5 66.7 62.2 67.9 90.5 111.6 118.1
1005 2008 99.5 70.9 75.5 60.5 106.2 77.0 69.4 58.7 61.0 72.2 121.3 133.1
1050 2009 94.1 68.3 73.4 75.0 104.8 114.3 68.3 64.5 71.7 105.4 114.3 95.8
528 2010 85.8 60.6 64.3 59.2 73.6 129.6 54.9 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 797 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-02 186
23-Jul-02 186
24-Jul-02 160
25-Jul-02 163
26-Jul-02 208
27-Jul-02 157
28-Jul-02 188
29-Jul-02 196
30-Jul-02 180
31-Jul-02 165
1-Aug-02 165
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02
10-Aug-02 117
11-Aug-02 117
12-Aug-02 196
13-Aug-02 218
14-Aug-02 190
15-Aug-02 200
16-Aug-02 127
17-Aug-02 165
18-Aug-02 193
19-Aug-02 199
20-Aug-02 274
21-Aug-02 274
22-Aug-02 274
23-Aug-02 283
24-Aug-02 291
25-Aug-02 247
26-Aug-02 235
27-Aug-02 237
28-Aug-02 212
29-Aug-02 218
30-Aug-02 265
31-Aug-02 252
1-Sep-02 309
2-Sep-02 286
3-Sep-02 280
4-Sep-02 266
5-Sep-02 247
6-Sep-02 268
7-Sep-02 268
8-Sep-02 221
9-Sep-02 238
10-Sep-02 202
11-Sep-02 229
12-Sep-02 250
13-Sep-02 247
14-Sep-02 318
15-Sep-02
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02
22-Sep-02 210
23-Sep-02 210
24-Sep-02 223
25-Sep-02 218
26-Sep-02 217
27-Sep-02 254
28-Sep-02 268
29-Sep-02 317
30-Sep-02 331
1-Oct-02 285
2-Oct-02 288
3-Oct-02 296
4-Oct-02 293
5-Oct-02 301
6-Oct-02 268
7-Oct-02 254
8-Oct-02 244
9-Oct-02 244
10-Oct-02 245
11-Oct-02 249
12-Oct-02 241
13-Oct-02 241
14-Oct-02 251
15-Oct-02 198
16-Oct-02 184
17-Oct-02 213
18-Oct-02 209
19-Oct-02 270
20-Oct-02 267
21-Oct-02 258
22-Oct-02 281
23-Oct-02 274
24-Oct-02 275
25-Oct-02 275
26-Oct-02 210
27-Oct-02 217
28-Oct-02 302
29-Oct-02 301
30-Oct-02 349
31-Oct-02 339
1-Nov-02 250
2-Nov-02 266
3-Nov-02 167
4-Nov-02 178
5-Nov-02 313
6-Nov-02 335
7-Nov-02 457
8-Nov-02 666
9-Nov-02 639
10-Nov-02 639
11-Nov-02 505
12-Nov-02 489
13-Nov-02 294
14-Nov-02 325
15-Nov-02 332
16-Nov-02 250
17-Nov-02 240
18-Nov-02 143
19-Nov-02 136
20-Nov-02 154
21-Nov-02 181
22-Nov-02 204
23-Nov-02 351
24-Nov-02 495
25-Nov-02 432
26-Nov-02 432
27-Nov-02 191
28-Nov-02 190
29-Nov-02 133
30-Nov-02 171
1-Dec-02 166
2-Dec-02 165
3-Dec-02 253
4-Dec-02 238
5-Dec-02 188
6-Dec-02 141
7-Dec-02 143
8-Dec-02 109
9-Dec-02 109
10-Dec-02 123
11-Dec-02 152
12-Dec-02 152
13-Dec-02 225
14-Dec-02 226
15-Dec-02 201
16-Dec-02 230
17-Dec-02 216
18-Dec-02 187
19-Dec-02 249
20-Dec-02 90
21-Dec-02 130
22-Dec-02 109
23-Dec-02 112
24-Dec-02 159
25-Dec-02 121
26-Dec-02 114
27-Dec-02 123
28-Dec-02 123
29-Dec-02 149
30-Dec-02 144
31-Dec-02 128
1-Jan-03 128
2-Jan-03 112
3-Jan-03 216
4-Jan-03 386
5-Jan-03 221
6-Jan-03 251
7-Jan-03 165
8-Jan-03 121
9-Jan-03 122
10-Jan-03 108
11-Jan-03 87
12-Jan-03 187
13-Jan-03 187
14-Jan-03 221
15-Jan-03 266
16-Jan-03 191
17-Jan-03 210
18-Jan-03 213
19-Jan-03 189
20-Jan-03 271
21-Jan-03 276
22-Jan-03 269
23-Jan-03 187
24-Jan-03 199
25-Jan-03 175
26-Jan-03 199
27-Jan-03 247
28-Jan-03 222
29-Jan-03 222
30-Jan-03 207
31-Jan-03 232
1-Feb-03 251
2-Feb-03 300
3-Feb-03 332
4-Feb-03 348
5-Feb-03 358
6-Feb-03 229
7-Feb-03 229
8-Feb-03 232
9-Feb-03 320
10-Feb-03 424
11-Feb-03 447
12-Feb-03 528
13-Feb-03 408
14-Feb-03 408
15-Feb-03 258
16-Feb-03 287
17-Feb-03 292
18-Feb-03 293
19-Feb-03 326
20-Feb-03 335
21-Feb-03 332
22-Feb-03 384
23-Feb-03 372
24-Feb-03 346
25-Feb-03 328
26-Feb-03 298
27-Feb-03 362
28-Feb-03 363
1-Mar-03 349
2-Mar-03 349
3-Mar-03 309
4-Mar-03 308
5-Mar-03 339
6-Mar-03 348
7-Mar-03 344
8-Mar-03 350
9-Mar-03 346
10-Mar-03 323
11-Mar-03 279
12-Mar-03 242
13-Mar-03 241
14-Mar-03 215
15-Mar-03 228
16-Mar-03 257
17-Mar-03 350
18-Mar-03 350
19-Mar-03 379
20-Mar-03 358
21-Mar-03 339
22-Mar-03 312
23-Mar-03 290
24-Mar-03 178
25-Mar-03 251
26-Mar-03 271
27-Mar-03 270
28-Mar-03 341 </