Ambuklao Dam Magat Dam STATUS OF Bokod, Benguet Binga Dam MONITORED Ramon, Isabela Cagayan Pantabangan Dam River Basin MAJOR DAMS Itogon, Benguet San Roque Dam Pantabangan, Nueva Ecija Angat Dam CLIMATE FORUM 22 September 2021 San Manuel, Pangasinan Agno Ipo Dam River Basin San Lorenzo, Norzagaray Bulacan Presented by: Pampanga River Basin Caliraya Dam Sheila S. Schneider Hydro-Meteorology Division San Mateo, Norzagaray Bulacan Pasig Laguna River Basin Lamesa Dam Lumban, Laguna Greater Lagro, Q.C. JB FLOOD FORECASTING 215 205 195 185 175 165 155 2021 2020 2019 NHWL Low Water Level Rule Curve RWL 201.55 NHWL 210.00 24-HR Deviation 0.29 Rule Curve 185.11 +15.99 m RWL BASIN AVE. RR JULY = 615 MM BASIN AVE. RR = 524 MM AUG = 387 MM +7.86 m RWL Philippine Atmospheric, Geophysical and Astronomical Services Administration 85 80 75 70 65 RWL 78.30 NHWL 80.15 24-HR Deviation 0.01 Rule Curve Philippine Atmospheric, Geophysical and Astronomical Services Administration 280 260 240 220 RWL 265.94 NHWL 280.00 24-HR Deviation 0.31 Rule Curve 263.93 +35.00 m RWL BASIN AVE. RR JULY = 546 MM AUG = 500 MM BASIN AVE. RR = 253 MM +3.94 m RWL Philippine Atmospheric, Geophysical and Astronomical Services Administration 230 210 190 170 RWL 201.22 NHWL 218.50 24-HR Deviation 0.07 Rule Curve 215.04 Philippine Atmospheric, Geophysical and Astronomical Services Administration +15.00 m RWL BASIN AVE. RR JULY = 247 MM AUG = 270 MM BASIN AVE. RR = 175 MM +7.22 m RWL Philippine Atmospheric, Geophysical and Astronomical Services Administration 200 190 180 170 160 150 RWL 185.83 NHWL 190.00 24-HR Deviation -0.12 Rule Curve 184.95 Philippine Atmospheric, Geophysical and Astronomical Services Administration +16.00 m RWL BASIN AVE. RR = 151 MM BASIN AVE. RR JULY = 219 MM +10.58 m RWL AUG = 245 MM Philippine Atmospheric, Geophysical and Astronomical Services Administration Assessment levels for 31 October 2021 (Based from the Forecast Basin RR from CLIMPS-CAD) Expected RWL Estimated Forecast Dam (AMSL) given Deviation Normal Basin Rule Basin Allocation Forecast from the High Water Rainfall Curve Rainfall (CMS) Rainfall (using Rule Level to reach (31 Oct) Dam (mm) Nomogram) Curve (NHWL) NHWL (c=0.9) (mm) 199.80 ANGAT 357 83 197.30 2.50 210 702 (201.55) 251.00 SAN ROQUE 104 49 279.65 -28.65 280 1044 (265.94) 204.39 PANTABANGAN 216 6.82 218.54 -14.15 221 1240 (201.22) Spilling Level MAGAT 209 14.55 188.21 4.79 193 84 (185.83) Website: www.bagongpagasa.dost.gov.ph Hydro-Meteorology Division Main Operation Center-Flood Forecasting and Warning Weather and Flood Forecasting Center, Quezon City (02) 8929 4065 / 8928 2754 / 8926 6970 / 8920 4052 [email protected] hmd.ffws @ FB and Twitter .