JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

2. HYDROMETEOROLOGY

2.1 Typhoon Tracks

Tropical Storm Ondoy entered the Philippine Area of Responsibility on September 24, 2009. Its entrance enhanced the southwest monsoon and brought rains to the Visayas and Central Luzon area. This caused severe rainfall over Metro Manila wherein normally one month of rain fell in just about six hours triggering knee-deep to roof-deep widespread flooding, power blackout and killing several hundreds of residents in the metropolis.

Just about a week after Ondoy, Tropical Storm Pepeng battered Central and Northern Luzon.

The tracks of these two typhoons are shown in Figure 2.1 and 2.2, respectively.

2.2 Locations of Rainfall and Water Level Stations in Luzon

Rainfall and water level stations for the island of Luzon are shown in Figure 2.3, while those in Metro Manila and along the Laguna Lake are shown in Figure 2.4. The rainfall and water level stations consist of a mixture of those under PAGASA, MMDA, LLDA and DPWH.

2.3 Listing of Rainfall and Water Level Stations in Luzon

Rainfall and water level have been recorded at several of the stations shown in Figures 2.3 and 2.4 where these two tropical storms left their tracks. Considering that most of the populace were caught unaware, only a few persons and agencies were able to partially record rainfall and water level. Only those stations equipped with automatic recorders and telemetering devices were able to fully record the whole event, although total consolidation of the collected data is not fully complete as of this time.

A listing of these rainfall and water level stations for the Island of Luzon is shown in Table 2.1. The list shown thereat includes the name of the station, the organization operating and maintaining these stations, longitude and latitude coordinates, sort of data collected, type of equipment used, data available with respect to the two tropical storms, availability of data and evaluation as to the accuracy of the data collected.

The actual collected data are shown in the attached optical recording file (i.e. DVD).

The hourly rainfall hyetographs and the water level hydrograph are shown in Annex 2 based on the collected data and included in the DVD.

2.4 Laguna Lake Development Authority (LLDA) Data

Water level in the Laguna Lake has also risen as a result of Tropical Storms Ondoy, Pepeng and other subsequent storms. This is shown also in Annex 2 and included in the DVD.

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JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Source: HMD, PAGASA Figure 2.1

Track of Tropical Storm Ondoy

2-2

JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Source: HMD, PAGASA

Figure 2.2 Track of Tropical Storm Pepeng

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JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Laoag City

TuguegaraoVigan

Baguio City

Casiguran

Dagupan

Baler

CabanatuanCLSU

Iba

Infanta

Science Garden

Port Area

NAIA

Napindan

Mt. CampanaAriesNangka

Boso-boso

Mt. OroMontalban

Sto. Nino

PandacanAngono

San Juan

Catmon

Munoz

Sapang Buho

Mayapyap Gabaldon

Zaragoza

PapayaSan Isidoro

Arayat

Candaba

Sibul Spring

Sasmuan Sulipan

Penaranda

Mexico

Calaanan

Palali

Porac

Pantabangan Marikit

Padalis

Bunga

Angat DamIpo Dam

TalaguioMaputi

MatulidNorzagaray

Rosales SC

Sta.Barbara

Carmen

Wawa

Mt.Ampucao

Banaga

Tibag

Binga Dam

Ambukulao Dam Bobok

Apunan

Badayan

San Roque Dam

Pangal

Maris Dam

Gamu

Tumauni

Magat DamHalog

Dantor

Sto. Domingo

Dumayap

Buyoc

Fort Santiago

Aparri

Itbayat

Basco

Laoag City

TuguegaraoVigan

Baguio City

Casiguran

Dagupan

Baler

CabanatuanCLSU

Iba

Infanta

Science Garden

Port Area Napindan

Mt. CampanaAriesNangka

Boso-boso

Mt. OroMontalban

Sto. Nino

Pandacan

San Juan

Catmon

Munoz

Sapang Buho

Mayapyap Gabaldon

Zaragoza

PapayaSan Isidoro

Arayat

Candaba

Sibul Spring

Sasmuan Sulipan

Penaranda

Mexico

Calaanan

Palali

Porac

Pantabangan Marikit

Padalis

Bunga

Angat DamIpo Dam

TalaguioMaputi

MatulidNorzagaray

Rosales SC

Sta.Barbara

Carmen

Wawa

Mt.Ampucao

Banaga

Tibag

Binga Dam

Ambukulao Dam Bobok

Apunan

Badayan

San Roque Dam

Pangal

Maris Dam

Gamu

Tumauni

Magat DamHalog

Dantor

Sto. Domingo

Dumayap

Buyoc

Fort Santiago

Aparri

Itbayat

Basco

LEGEND:

RAIN GAUGE STATION

WATER LEVEL STATION

RAIN GAUGEAND WATER LEVEL STATION

AGNO RIVER BASIN

CAGAYAN RIVER BASIN

PAMPANGA RIVER BASIN

N

Source: HMD, PAGASA Figure 2.3

Map of Rainfall and Water Level Stations in Luzon

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JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

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Figure 2.4 Map of Rainfall and Water Level Stations in Metro Manila and along Laguna Lake

Survey Report, The Project for the Rehabilitation of the Flood Control Operation and Warning System in Metro Manila

JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Table 2.1 List of Rainfall and Water Level Stations in Luzon

Long Lat from to132 Itbayat P/S 121.8000 20.7500 R - - - -

135 Basco P/S 121.9667 20.4500 R Chart Recorder - - Complete, available in chart and 6-hourly reading

232 Aparri P/S 121.6333 18.3667 R - - - -223 Laoag City P/S 120.5333 18.1833 R - - - -233 Tuguegarao P/S 121.7333 17.6167 R - - - -222 Vigan P/S 120.3833 17.5667 R - - - -

328 Baguio City P/S 120.6000 16.4167 R Chart Recorder 9/24/2009 9:00 9/30/2009 8:00 Complete, available in chart and 6-hourly reading

336 Casiguran P/S 122.1167 16.2833 R Chart Recorder 9/24/2009 9:00 9/30/2009 8:00 Complete, available in chart and 6-hourly reading

325 Dagupan P/S 120.3333 16.0500 R - - - No data

333 Baler P/S 121.5667 15.7667 R Chart Recorder 9/24/2009 9:00 9/30/2009 8:00 Complete, available in chart and 6-hourly reading

330 Cabanatuan P/S 120.9667 15.4833 R Chart Recorder 9/24/2009 9:00 9/30/2009 8:00 Complete, available in chart and 6-hourly reading

329 CLSU P/S 120.9000 15.4833 R - - - No data

324 Iba P/S 119.9667 15.3333 R Chart ecorder 9/24/2009 9:00 9/30/2009 8:00 Complete, available in chart and 6-hourly reading

434 Infanta P/S 121.6500 14.7500 R - - - No data

430 Science Garden P/S 121.0419 14.6447 R Tel meter 9/25/2009 9:00 9/28/2009 8:00 Complete. Continuous hourly datafrom 8am Sep 25 to 7 am Sep 27

425 Port Area P/S 120.9686 14.5856 R Tel meter 9/25/2009 9:00 9/28/2009 8:00 Complete. Continuous hourly datafrom 8am Sep 25 to 7 am Sep 27

429 NAIA P/S 121.0167 14.5167 R - - - No data

Catmon DPWH 120.8097 14.8456 R Telemeter 9/25/2009 9:00 9/28/2009 8:00 Complete. Continuous hourly datafrom 8am Sep 25 to 7 am Sep 27

Boso-boso M/E 121.2231 14.6400 R Tel meter 9/26/2009 9:00 9/28/2009 8:00 Complete. Continuous hourly datafrom 8am Sep 26 to 7 am Sep 27

Aries M/E 121.1689 14.6628 R Tel meter 9/26/2009 9:00 9/28/2009 8:00 Partly missing from 2pm to 4pmSep 26

Mt. Oro M/E 121.1578 14.7800 R Tel meter 9/26/2009 9:00 9/28/2009 8:00 Partly missing from 2pm to 4pmSe

R

e

e

e

e

e p 26

Nangka M/E 121.1486 14.6161 R Tel meter 9/26/2009 9:00 9/28/2009 8:00 Partly missing from 2pm to 9pmSee p 26

Nangka M/E 121.1486 14.6161 W Tel meter 9/26/2009 9:00 9/27/2009 8:00 Only 4 hrs of data from 9am to12noon on Sep 26

Code Station Name Organization Coordinates Record EvaluationData Type Eqipment Type

e

Source of Coordinates: HMD, PAGASA

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JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Table 2.1 List of Rainfall and Water Level Stations in Luzon, cont’d.

Long Lat from toNapindan M/E 121.0669 14.5589 W - - - No dataMt. Campana M/E 121.2914 14.6683 R - - - No data

Montalban M/E 121.1442 14.7342 W Telemeter 9/26/2009 9:00 9/28/2009 8:00 Partly missing for 2hrs from 2pm to4pm on Sep 26

Sto. Nino M/E 121.0925 14.6375 W Tel meter 9/26/2009 9:00 9/28/2009 8:00 Partly missing for 4 hrs on Sep 26Rosario US M/E - - W Telemeter 9/26/2009 9:00 9/28/2009 8:00 Com

eplete

Rosario DS M/E - - W Telemeter - - No data

Pandacan M/E 121.0111 14.5911 W Tel meter 9/26/2009 9:00 9/28/2009 8:00 Partly missing for 2 hrs from 2pmto 3pm on Sep 26

Fort Santiago M/E 121.9686 14.5961 W Telemeter 9/26/2009 9:00 9/28/2009 8:00 Partly missing for 5 hrs from 2pmto 6pm on Sep 26

Angono M/E 121.1511 14.5275 W Tel meter 9/26/2009 9:00 9/28/2009 8:00 No dataSan Juan M/E 121.0222 14.6075 W - - - No data

9/25/2009 0:00 9/28/2009 23:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 8/28/2009 8:0010/6/2009 0:00 10/17/2009 8:009/25/2009 0:00 9/28/2009 0:0010/6/2009 0:00 10/17/2009 8:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 8:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 8:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 8:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 8:00

WCompleteSapanga Buho

R Telemeter Complete. Continuous hourly datafrom Oct 6 0am to Oct 17 8am

R

Munoz P/P 120.9608 15.7381

Gabaldon P/P 121.3556 15.4986

15.5942P/P 121.1192

R Telemeter Complete

Complete

R

CompleteR

WZaragoza

120.9556 15.5144W

P/P 120.7508 15.4433

Mayapyap CompleteP/P

Calaanan

Complete

P/P

P/P

121.1859

121.0656Palali

15.6483 R Tel meter

Tel meterR

WPenaranda P/P 121.0056 15.3539

15.3547 R Tel meter Complete

Code

Telemeter

Tel meter

Tel meter

Data Type Eqipment Type RecordStation Name Organization Coordinates Evaluation

e

e

e

e

e

e

e

Source of Coordinates: HMD, PAGASA

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JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Table 2.1

Long Lat from to9/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:009/25/2009 0:00 9/28/2009 8:0010/6/2009 0:00 10/17/2009 23:00

Pantabangan Dam P/P/DP 121.1094 15.8183 R - - - MissingPantabangan Dam P/P/DP 121.1094 15.8183 W - - - MissingMarikit P/P/DP 121.2756 15.7986 R - - - MissingPadalis P/P/DP 121.1925 15.9264 R - - - MissingBunga P/P/DP 121.0367 16.0550 R - - - MissingMaputi P/P/DA 121.2542 15.0708 R Telemeter 9/25/2009 1:00 2009/10/4 15'00 CompleteTalaguio P/P/DA 121.1681 15.0358 R Telemeter 9/25/2009 1:00 2009/10/4 15'00 Complete

Code Station Name Organization Coordinates Data Type Eqipment Type Record Evaluation

RComplete

121.0575 15.1678

120.8503P/P 15.1156

Arayat P/P 120.7822 15.1683

Sibul Spring P/P

San Isidro P/PW

Candaba

120.9025 15.3136

Telemeter Complete

Tel meter

Tel meter

R Telemeter

W

R

W

R

14.9394R

WSulipan P/P 120.7586

Sasmuan P/P 120.6231R

Mexico 15.0681R

WTelemeter Complete

CompleteTel meter

14.9372W

Porac 15.0801 R Telemeter

Palali 15.3806 R Telemeter

San Rafael R

P/P 120.7308

P/P 121.1614

P/P 120.5454

P/P Telemeter Complete

Telemeter

Complete

Complete

Complete

Complete

Complete

e

e

e

List of Rainfall and Water Level Stations in Luzon, cont’d.

Source of Coordinates: HMD, PAGASA

2-7

JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Table 2.1

Long Lat from to

Matulid P/P/DA 121.2547 14.9142 R Telemeter 9/25/2009 1:00 2009/10/4 15'00 CompleteAngat P/P/DA 121.1650 14.9114 R Telemeter 9/25/2009 1:00 2009/10/4 15'00 CompleteAngat Dam P/P/DA 121.1650 14.9114 W Telemeter 9/25/2009 1:00 2009/10/4 15'00 CompleteNorzagaray P/P/DA 121.0514 14.9119 R Telemeter - - MissingSan Roque Dam (D) P/A 120.6853 16.1269 R Telemeter 9/24/2009 9:00 9/28/2009 8:00 MissingSta.Barbara P/A 120.4011 16.0067 R Telemeter 9/24/2009 9:00 9/28/2009 8:00 MissingCarmen P/A 120.5928 15.8900 R Telemeter 9/24/2009 9:00 9/28/2009 8:00 MissingWawa P/A 120.4472 15.7744 R Telemeter 9/24/2009 9:00 9/28/2009 8:00 MissingMt.Ampucao P/A 120.6619 16.3300 R Telemeter 9/24/2009 9:00 9/28/2009 8:00 MissingBanaga P/A 120.2211 15.2544 R - - - -Tibag P/A 120.5692 15.4872 R Telemeter 9/24/2009 9:00 9/28/2009 8:00 MissingBadayan P/A/DBA 120.8314 16.7553 R Telemeter 10/1/2009 9:00 10/12/2009 0:00 CompleteApunan P/A/DBA 120.8247 16.5728 R Telemeter 10/1/2009 9:00 10/12/2009 0:00 CompleteBobok P/A/DBA 120.8175 16.4500 R Telemeter 10/1/2009 9:00 10/12/2009 0:00 Complete

R 10/1/2009 9:00 10/12/2009 0:00 CompleteW 10/1/2009 9:00 10/12/2009 0:00 CompleteR 10/1/2009 9:00 10/12/2009 0:00 CompleteW 10/1/2009 9:00 10/12/2009 0:00 CompleteR 10/1/2009 9:00 10/12/2009 0:00 CompleteW 10/1/2009 9:00 10/12/2009 0:00 Complete

Pitican P/A/DBA R Tel meter 10/1/2009 9:00 10/12/2009 0:00 CompleteAmpucao P/A/DBA 120.6619 16.3300 R Telemeter 10/1/2009 9:00 10/12/2009 0:00 Complete

9/22/2009 9:00 9/28/2009 8:009/29/2009 9:00 10/11/2009 8:009/22/2009 9:00 9/28/2009 8:009/29/2009 9:00 10/11'2009 8:009/22/2009 9:00 9/28/2009 8:009/29/2009 9:00 10/11/2009 8:009/22/2009 9:00 9/28/2009 8:009/29/2009 9:00 10/11'2009 8:009/22/2009 9:00 9/28/2009 8:009/29/2009 9:00 10/11/2009 8:00

W - - No data9/22/2009 9:00 9/28/2009 8:009/29/2009 9:00 10/11/2009 8:009/22/2009 9:00 9/28/2009 8:009/29/2009 9:00 10/11'2009 8:00

EvaluationCoordinaType Eqipment Type Record

Tel meter

San Roque Dam P/A/DBA 120.6840 16.1460 Tel meter

Binga Dam P/A/DBA 120.7267 16.3961

Ambukulao Dam P/A/DBA 120.7439 16.4611 Tel meter

Maris Dam P/C 121.5139 16.8388 Partly missing

TelemeterR

R

WTelemeter

Gamu P/C 121.8421 17.0717

Tumauni P/C 121.7989 17.2738R

WTelemeter

Partly missing

Partly missing

Tuguegarao P/C 121.6903 17.6154R

WTel meter Partly missing

Code Station Name Organization tes Data

e

e

e

e

e

List of Rainfall and Water Level Stations in Luzon, cont’d.

Source of Coordinates: HMD, PAGASA

2-8

JICA Study on Disaster caused by the Typhoon No. 16 (Ondoy) and No. 17 (Pepeng)

Table 2.1 List of Rainfall and Water Level Stations in Luzon, cont’d.

Long Lat from to

R - -W - -

Halog P/C/DM 121.0589 16.8647 R Telemeter 2009/9/25 1:00 10/10/2009 23:00 No dataDantor P/C/DM 121.2022 16.9461 R Telemeter 2009/9/25 1:00 10/10/2009 23:00 No dataSto. Domingo P/C/DM 121.1169 16.4347 R Telemeter 2009/9/25 1:00 10/10/2009 23:00 No dataSto. Domingo P/C/DM 121.1169 16.4347 W Telemeter - - No dataDumayap P/C/DM 121.2728 16.5744 R Telemeter 2009/9/25 1:00 10/10/2009 23:00 No dataBuyoc P/C/DM 121.1936 16.7450 R Telemeter 2009/9/25 1:00 10/10/2009 23:00 No data

Notes/Explanations:Data: R Rainfall

W Water LevelOrganization P/S PAGASA Synoptic Station

P/P PAGASA Pampanga FFWSP/A PAGASA Agno FFWSP/C PAGASA Cagayan FFWSP/P/DA PAGASA Pampanga Angat FFWSDOP/P/DP PAGASA Pampanga Pantabangan FFWSDOP/P/DBA PAGASA Pampanga Binga & Ambukulao FFWSDOP/C/DM PAGASA Cagayan Magat FFWSDOM/E MMDA EFCOS

Code Station Name Organization Coordinates Data Type Eqipment Type Record Evaluation

R16.6103

9/29/2009 9:00 10/11/2009 8:00

9/29/2009 9:00Pangal

WP/C 121.6806

10/11/2009 8:00Telemeter

Telemeter No dataMagat Dam P/C/DM 121.4506 16.8333

Source of Coordinates: HMD, PAGASA

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