Results
| Country: | Philippines
| | Station: | Arayat,Pampanga | | River: | Pampanga | | Area: | 6487 km2 | | Lat: | 15.16 | | Lon: | 120.76 | | Source: | | | PointID: | 158 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1969 | | Ending Year: | 1975 | | Total Years: | 7 | | Total Usable Years: | 7 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1969 | 33.5 | 19 | 11 | 11.5 | 12.5 | 41 | 172 | 686 | 422 | 260 | 100 | 86 | 154.54 |
| 1970 | 43 | 26.5 | 19 | 28.5 | 17.5 | 118 | 189 | 416 | 877 | 627 | 399 | 204 | 247.04 |
| 1971 | 67 | 43 | 44 | 24 | 75 | 464 | 691 | 437 | 312 | 1040 | 372 | 386 | 329.58 |
| 1972 | 369 | 122 | 69.5 | 52.5 | 59 | 121 | 1618 | 1400 | 593 | 130 | 142 | 93.5 | 397.46 |
| 1973 | 30 | 32.5 | 5.63 | 2.41 | 2.98 | 25 | 81 | 341 | 378 | 916 | 298 | 122 | 186.21 |
| 1974 | 30 | 12.5 | 13 | 9.44 | 11 | 208 | 271 | 794 | 247 | 642 | 797 | 332 | 280.58 |
| 1975 | 192 | 118 | 86.5 | 82.5 | 79 | 124 | 89 | 197 | 238 | 244 | 106 | 231 | 148.92 |
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| Avg | 109.21 | 53.36 | 35.52 | 30.12 | 36.71 | 157.29 | 444.43 | 610.14 | 438.14 | 551.29 | 316.29 | 207.79 | 249.19 |
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| Std Dev | 118.8 |
43.1 |
29.52 |
26.26 |
30.48 |
137.13 |
516.31 |
373.06 |
211.44 |
325.7 |
227.64 |
108.89 |
86.53 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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