Summary Report

SUMMARY REPORT

RESULTS OF THE MGB GEOHAZARD ASSESSMENT COVERING THIRTY TWO (32) MUNICIPALITIES/CITIES IN THE PROVINCE OF NUEVA ECIJA

In line with the recent Presidential Directive and NDCC resolutions following the February 17 Southern Leyte landslide incident, and the need to fast track the geohazard mapping program along the eastern seaboard of the Philippines, geologists from the Mines and Geosciences Bureau-Regional Office III (MGB-R3) conducted a geohazard assessment of the barangays in the municipalities/cities in the province of Nueva Ecija.

Each barangay was classified according to their susceptibility to landslide and/or flooding. For landslide susceptibility, the rating parameters are as follows:

High • Presence of active and/ or recent landslides • Presence of numerous and large tension cracks along slope adjacent to the community and that would directly affect the community • Areas with drainages that are prone to landslides damming • Steep/Unstable slopes consisting of loose materials

Moderate • Areas with indicative and/or old landslides • Presence of small tension cracks along slope and are located away from the community • Moderate slopes

Low • Low to gently sloping • No presence of tension cracks

Each barangay was rated into low, moderate or high for flooding susceptibility with the rating parameters as follows:

Low • 0 – 0.5 meter depth of floodwaters

Moderate • 0.51 – 1 meter depth of floodwaters

High • > 1 meter depth of floodwaters

With regards to landslide susceptibility, the barangays assessed include areas that are located on and/or near slopes and riverbanks and have the potential for landslide occurrence. The rating of each barangay presented herein particularly refers to the barangay proper since majority of the population is located there. It should be noted, however, that the rating does not necessarily reflect those of the sitios. These barangays were presented with a Landslide Threat Advisory informing their susceptibility to landslides and the corresponding recommendations particular to the barangay.

The flood susceptibility of the barangays in the ten (10) municipalities/city was also assessed. Barangays classified with moderate to high susceptibility to flooding are located in identified low portions of the barangay, in topographically low-lying areas and/or near a major river system. These barangays were presented with a Geohazard Threat Advisory informing their susceptibility to flooding and the corresponding recommendations particular to the barangay.

2 Table 1. Number of Assessed Barangays

Municipality/City Total Barangays Number of Assessed Barangays 1. Aliaga 26 26 2. Bongabon 28 28 3. Cabanatuan City* 89 89 4. Carranglan 17 17 5. Cuyapo 51 51 6. Gabaldon 16 16 7. City of Gapan 23 23 8. Gen. M. Natividad 20 20 9. Gen. Tinio 12 12 10. Guimba 64 64 11. Laur 17 17 12. Licab 11 11 13. Llanera 22 22 14. Lupao 24 24 15. Science City of Muñoz 37 37 16. Nampicuan 21 21 17. Palayan City* 20 20 18. Pantabangan 14 14 19. Peñaranda 10 10 20. Quezon 16 16 21. Rizal 22 22 22. San Jose City 38 38 23. San Leonardo 15 15 24. Sta. Rosa 33 33 25. Sto. Domingo 24 24 26. Talavera 53 53 27. Talugtug 28 28 28. Zaragosa 19 19 29. Cabiao** 23 23 30. Jaen** 27 27 31. San Antonio** 16 16 32. San Isidro** 9 9

TOTAL 845 845

*- UNDP 2005 (MGBCO), updating of hazard maps conducted by the MGBR3 **- conducted during the 2004-2005 hazard mapping along Pampanga River

3 SUMMARY OF THE ASSESSMENT:

1. Municipality of Aliaga

• In terms of landslide susceptibility, no barangays in Aliaga have the potential for landslide occurrence.

• Active riverbank erosion is observed in three (3) barangays (Sta. Monica, San Eustacio and San Emiliano).

• There are ten (10) barangays with none to low susceptibility to flooding (Magsaysay, Santiago, San Felipe (Bata), Umangan, San Eustacio, Sto. Tomas, Macabucod, San Pablo (Matanda), Poblacion Centro and Poblacion West)

• There are ten (10) barangays with low to moderate susceptibility to flooding. Most of the residential area has low flooding susceptibility. Agricultural areas of the barangay has moderate to high susceptibility (Sto. Rosario, Bucot, San Pablo Bata, Poblacion East I, Poblacion East II, Poblacion West III, San Carlos, Betes, Pantok and Sunson).

• There are three (3) barangays with moderate to high susceptibility to flooding. These barangays have portions adjacent to active creeks and river channel (Sta. Monica, San Juan and San Felipe Matanda).

• There are two (2) barangays with low, moderate to high susceptibility to flooding. The barangay has naturally low-lying areas and portions located near active creeks and river channel (San Emiliano and La Purisima).

2. Municipality of Bongabon

• There is one (1) barangay with high landslide and debris flow susceptibility (Labi)

• There are four (4) barangays with low flood susceptibility (Magtanggol Palomaria, Sinipit and Olivete).

• There are two (2) barangays with low to moderatye flood susceptibility (Antipolo and Makabaklay)

• There are five (5) barangays with moderate flood susceptibility (Pesa, Tugatog, Larcon, Cruz and Santor).

• There are three (3) barangays with moderate to high flood susceptibility (Vega, Ariendo and Lusok).

4 • There are four (4) barangays with portions susceptible to high level floods. These barangays are located near active creeks and Digmala River and with portions that are located in generally low-lying areas. (Labi, Curva and Caingin).

• Riverbank erosion is identified in four (4) barangays (Calaanan, Pesa,Tugatog and Larcon)

3. Cabanatuan City

• Updating of the 2005 Hazard Maps (UNDP 2005)

• Location of the barangay centers included in the geohazard data base

• Hazard identified is mostly related to flooding from the overflow of major rivers including Pampanga River, Cabu River and creeks traversing the area.

• Majority of the city has a low susceptibility to flooding. Barangays with moderate to high susceptibility are those located adjacent to the river and located in the generally low-lying areas. With historical moderate to high susceptibility to flooding and flashflooding particularly in the areas influenced by Pampanga River and Cabu River, and flash flood coming from the adjacent mountainous municipalities and with natural drainage draining towards the city.

4. Municipality of Carranglan

• There are two (2) barangays with low landslide susceptibility (Salazar and Burgos)

• There are six (6) barangays with moderate to high landslide susceptibility (Gen. Luna, Capintalan, Minuli, Putlan, Piut and Joson(Digdig) )

• Active riverbank erosion is observed in two (2) barangays (Piut and Puncan)

• There are four (4) barangays with low susceptibility to flooding (T. L. Padilla, F. C Otic, Bunga and Putlan)

• There are six (6) barangays with low to moderate susceptibility to flooding. Most areas of the barangay are low susceptible. Agricultural lands and portions near creek/river are moderately susceptible to flooding. (D. L. Maglanoc, G. S. Rosario, R. A. Padilla, San Agustin, Puncan and Bantug)

• There are two (2) barangays with portions susceptible to high level floods. These barangays are located near active creeks and Carranglan River and with portions that are located in generally low-lying areas. (Bantug and Gen. Luna)

• There are six (6) barangays with landslide susceptibility due to faulting and seismicity (Capintalan, Minuli, Putlan, Piut, Joson (Digdig) and Puncan)

5. Municipality of Cuyapo

• There are thirty five (35) barangays with low susceptibility to flooding (barangay centers and populated areas) in the municipality of Gerona (Sta. Clara, Nagmisaan, Burgos, Cabileo, Curva, Simimbaan, Sabit, Bued, Malineng, Sta. Cruz, Cacapasan, Colosboa, Rizal, Salagusog, Columbitin, Paitan Sur, Paitan Norte, Nagcuralan, San Juan, Landig, Bonifacio, Baloy, Tutuloy, Calancuasan Sur, Calancuasan Norte, Luna, Maycaban, Landig, Cabatuan, Malbeg, Bantog, Latap, Pugo, District 1,2 and 6). Most of the purok affected with localized flooding are located in the low-lying portion of the barangay, do not have sufficient drainage and located near the creek/river systems traversing the barangay.

• The are sixteen (16) barangays experiencing different susceptibility to flooding from low, moderate to high depending on the topographic location (Tagtagumbao, Ungab, Districts [4, 5, 7, 8], San Antonio, Loob, Bentigan, San Jose, Bulala, Bibiclat, Matindeg, Bambanaba, Piglisan, Villa Flores). These are low-lying areas affected by the overflow from the creek/rivers and excessive surface run-off coming from the adjacent barangays and municipalities. Backflooding results from the inadequate drainage and exit points during unusually heavy rainy day and typhoon periods. Structurally controlled flooding such as elevated roads and road system with insufficient drainage, irrigation canals and excessive release of water from dams in the nearby municipalities of Nueva Ecija and Pangasinan is also a possible cause.

• The agricultural areas/farm lots have a moderate to high susceptibility to flooding.

• Localized flooding that usually subside after the rains can be attributed to inadequate drainage system during periods of unusually heavy precipitation.

• For landslide susceptibility, there are five barangays with low to moderate susceptibility to landslides. The topography is generally gently sloping and no tension cracks were observed (Paitan Sur, Paitan Norte, Nagcuralan, San Juan and Landig).

6. Municipality of Gabaldon

• There are three (3) barangays with high landslide susceptibility (Cuyapa, Pinamalisan, and Sawmill).

6 • There are six (6) barangays with moderate landslide susceptibility (Calabasa, Macasandal, Malinao, Pantoc, South Poblacion, and Tagumpay).

• There are four (4) barangays with low landslide susceptibility (Bagong Sikat, Bagting, Bantug, and Bitulog – North Poblacion).

• There are three (3) barangays with no landslide susceptibility (Bugnan, Camachile, and Ligaya).

• In terms of flood and flashflood susceptibility, all assessed barangays were found to be susceptible to flooding. These barangays are located in low-lying areas and/or lie near a major river system.

7. City of Gapan

• In terms of landslide susceptibility, no barangays in the City of Gapan have the potential for landslide occurrence.

• Active riverbank erosion is observed in four (4) barangays (Parcutela, Marelo, San Lorenzo and Kapalangan).

• There is one (1) barangay with low to high susceptibility to flooding (Mangino)

• There are twenty one (21) barangays with moderate to high susceptibility to flooding. These barangays have portions adjacent to active creeks and river channel (Parcutela, Marelo, San Roque, Malimba, Sto. Cristo Sur, Sto. Cristo Norte, Bayanihan, San Nicolas, Pambuan, San Lorenzo, San Vicente, Sta. Cruz, Maburak, Mabuga, Putting Tubig, Bungo, Mahipon, Kapalangan, Bulak, Sto. Niño and Balante).

• There is one (1) barangay with high susceptibility to flooding. The barangay has portions located near active creeks and river channel (Makabaklay).

8. Municipality of Gen. M. Natividad

• There are six (6) barangays with low susceptibility to flooding (barangay centers and populated areas) in the municipality of Gen. Natividad (Pinahan, Platero, Natividad, Magasawang Sampaloc, Balangkare Norte and Balangkare Sur).

• There are four (4) barangays with low susceptibility to flooding in most areas of the barangay but there are purok/sitio that have moderate susceptibility to flooding. Most of the areas affected with localized flooding are located in the low- lying portion of the barangay, agricultural areas, no sufficient drainage, located

7 near the creek/river/irrigation channels traversing the barangay and backflooding (Manarog, Talabutab Norte, Belen and Poblacion).

• There are ten (10) barangays with low susceptibility to flooding in most areas but there are purok/sitio that have moderate to high susceptibility to flooding. Most of the areas affected with flooding are located near the Pampanga River, generally locate in the low-lying portion of the barangay, agricultural areas, no sufficient drainage, located near the creek/river/irrigation channels traversing the barangay and backflooding (Sapang Bato, Kabuluan, Mataas na Kahoy, Burol, Balaring, Pulong Singkamas, Picaleon, Panacsac, Talabutab Sur and Bravo)

• The agricultural areas/farm lots have a moderate to high susceptibility to flooding.

• Localized flooding that usually subside after the drains can be attributed to inadequate drainage system during periods of unusually heavy precipitation.

9. Municipality of Gen. Tinio

• In terms of landslide susceptibility, no barangays in Gen. Tinio have the potential for landslide occurrence.

• Active riverbank erosion is observed in seven (7) barangays (Pias, Rio Chico, Poblacion East, Poblacion Centro, Poblacion West, Bago and Padolina).

• There are four (4) barangays with low susceptibility to flooding (Nazareth, San Pedro, Sampaguita and Pulong Matong).

• There is one (1) barangay with low to moderate susceptibility to sheet flooding (Concepcion)

• There are four (4) barangays with portions susceptible to moderate to high level floods. These barangays have portions adjacent to active creeks and river channel (Pias, Rio Chico, Bago and Padolina).

• There are three (3) barangays with portions susceptible to high level floods. These barangays have portions located near active creeks and river channel (Poblacion East, Poblacion Centro and Poblacion West).

10. Municipality of Guimba

• In terms of landslide susceptibility, no barangays in Guimba have the potential for landslide occurrence.

8 • Active riverbank erosion is observed in twenty six (26) barangays (Sta. Cruz, San Bernardino, Caballero, Triala, Culong, Bagong Barrio, Pasong Inchic, San Rafael, Casongsong, Bacayao, Macamias, Guiset, San Andres, Ayos Lomboy, Macapabellag, Faigal, Cavite, Sta. Lucia, San Miguel, Manacsac, Caingin-Tabing Ilog, Calem, Partida II, Macatcatuit, Narvacan II and Sta. Veronica.

• There are sixteen (16) barangays with none to low susceptibility to flooding (Tampac I, Tampac II, Tampac III, Sta. Cruz, San Bernardino, Caballero, Triala, Consuelo, San Roque, Manggang Marikit, San Rafael, Naglabrahan, Cardinal, Magpandayan, Catimon and Banitan).

• There are thirteen (14) barangays with low to moderate susceptibility to flooding. Most of the residential area has low flooding susceptibility. Identified low-lying and agricultural areas of the barangay has moderate to high susceptibility (Bagong Barrio, Pasong Inchic, Casongsong, Guiset, San Andres, Camiling, Cabaruan, Lamorito, Maybubon, San Agustin, Magpandayan, Balingog East, Bantug and Sto. Cristo).

• There are twelve (12) barangays with moderate to high susceptibility to flooding. The barangay has naturally low-lying areas and portions adjacent to active creeks and river channel (Culong, Cawayan Bugtong, Narvacan I, Macamias, Ayos Lomboy, San Miguel, Galvan, Yuzon, Agcano, Partida I, Macatcatuit and Saranay).

• There are sixteen (16) barangays with low, moderate to high susceptibility to flooding. The barangay has naturally low-lying areas and portions located near active creeks and river channel (Pacac, Bacayao, Balbalino, San Marcelino, Saint John (Poblacion), Macapabellag, Sta. Ana, Faigal, Sinulatan, Sta. Lucia, Bulakid, Escano, Manacsac, Balingog West, Subol and Maturanoc).

• There are eight (7) barangays with high susceptibility to flooding. These barangays have portions adjacent to active creeks and river channel, and has naturally low-lying areas (Cavite, Caingin-Tabing Ilog, Calem, Partida II, Lennec, Narvacan II and Sta. Veronica).

11. Municipality of Laur

• There is one (1) barangay with moderate landslide susceptibility (Bayug)

• There are four (4) barangays with low landslide susceptibility (Bacao, Burac, Pantoc and San Fernando).

• There are twelve (12) barangays with low flood susceptibility (Poblacion I, II, III, San Felipe, San Juan. Paludpod, Pintol, Bacao, Pantoc, Bayug, San Isidro and San Fernando).

9 • There is one (1) barangay with moderate flood susceptibility (Pinagbayanan)

• There are nine (9) barangays with low to moderate flood susceptibility (Poblacion IV, Siclong, San Vicente, Canantong, San Josef, Sagana, Labi, Casa Real and Burac).

• There are five (5) barangays and one (1) sitio with portions susceptible to high level floods. These barangays are located near active creeks and Coronel River and with portions that are located in generally low-lying areas. (Pacarso, Kamuning, Panaulo, Betania, San Antonio and Sitio Pangarulong)

• There are two (2) barangays and one (1) sitio with portions prone to liquefaction (Panaulo, Betania and Sitio Pangarulong)

12. Municipality of Licab

• In terms of landslide susceptibility, no barangays in Licab have the potential for landslide occurrence.

• Active riverbank erosion is observed in three (3) barangays (Tabing Ilog, Villarosa and San Cristobal).

• There are three (3) barangays with low to moderate susceptibility to flooding. Most of the residential area has low flooding susceptibility. Agricultural areas of the barangay has moderate to high susceptibility (San Casimiro, Sta. Maria and San Jose).

• There are seven (7) barangays with moderate to high susceptibility to flooding. These barangays have portions adjacent to active creeks and river channel (Poblacion, Poblacion Norte, San Juan, Tabing Ilog, Linao, Villarosa and San Cristobal).

• There is one (1) barangay with high susceptibility to flooding. The barangay has naturally low-lying areas and portions located near active creeks and river channel (Aquino).

13. Municipality of Llanera

• There are eighteen (18) barangays with low susceptibility to flooding (barangay centers and populated areas) in the municipality of Llanera (Gomez, Florida Blanca, Villa Veniegas, Sta. Barbara, Ligaya, San Nicolas, Caridad Norte, Casile,

10 Gen Luna, Murcon, Gen. Ricarte, Mabini, Inanama, A. Bonifdacio Sur, A. Bonifacio Norte, Victoria, Bagumbayan and Plaridel).

• There are four (4) barangays with low susceptibility to flooding in most areas but there are purok/sitio that have moderate to high susceptibility to flooding. Most of the areas affected with localized flooding are located in the low-lying portion of the barangay, agricultural areas, no sufficient drainage, located near the creek/river/irrigation channels traversing the barangay and backflooding (Caridad Sur, San Felipe, San Vicente and Basque).

• The agricultural areas/farm lots have a moderate to high susceptibility to flooding.

• Localized flooding that usually subside after the rains can be attributed to inadequate drainage system during periods of unusually heavy precipitation.

14. Municipality of Lupao

• In terms of landslide susceptibility, there are six (6) barangays in Lupao that are located on and/or near slopes and have potential for landslide occurrence. The rating of each barangay presented herein particularly refers to the barangay proper since majority of the population is located there.

• Most of the barangays in the municipality of Lupao has a low flood and flashflood susceptibility. For this rapid geohazard assessment and mapping, flooding had been classified into flash, sheet, channel confined or river flooding and urban flooding. Since the municipality is generally located at a higher elevation than the nearby municipalities, there is a low incidence of the creeks and rivers overtopping its banks. However, there are barangays that are possible landslide debris accumulation zones based on past events such as the North Luzon Earthquake of 1990.

• The twenty four (24) barangays in the municipality of Lupao have low susceptibility to flooding.

• One barangay (1), Tienzo has a low susceptibility in most area of the barangay; however, Purok 3 has a moderate to high susceptibility to flooding.

• Other hazards identified include river flooding or channel confined flooding, active river bank erosion and siltation. Riverbank erosion was observed in the active creeks/river and natural channels traversing the municipality (Arimal Creek, Panabcan River, Agupalo River, Balibago Creek, Alimutong Creek, Macanawed River). Siltation will result to shallow riverbeds.

15. Science City of Muñoz

• There are twenty four (24) barangays with low susceptibility to flooding (Bantug, Cabisuculan, Calabalabaan, Calisitan, Curva, Gabaldon, Labney, Licaong, Linglingay, Magtanggol, Maligaya, Mangandingay, Maragol, Mapangpang, Naglabrahan, Poblacion East, Poblacion South, Poblacion West, Rang-ayan, Rizal, San Andres, Villa Quizon, Villa Isla and Villa Nati).

• There are seven (7) barangays with low to moderate susceptibility to flooding. Agricultural areas of the barangay, identified low-lying areas and those located near the creek/river channel has moderate susceptibility (Balante, Bical, Palusapis, Poblacion North, San Antonio, San Felipe and Sapang Cauayan).

• There are four (4) barangays with moderate to high susceptibility to flooding. The barangay has naturally low-lying areas and portions located near active creeks and river channel (Bagong Sikat, Catalanacan, Franza and Matingkis).

• Riverbank erosion was observed in the active creeks/river and natural channels traversing the municipality such as Ilog Baliwag, Calisitan Creek, Sinulatan Creek and Napnitan Creek.

• Siltation is evident along the active channels traversing the municipality.

• The Casecnan irrigation system passes through several barangays of the city. To date, the effect of the Casecnan canals with regard to flooding is not evident yet.

16. Municipality of Nampicuan

• All twenty one (21) barangays experience varying degrees of flooding.

• There are ten (10) barangays with low to moderate susceptibility to flooding (Edy, Tony, Maeling, Medico, Cabawangan, East Central Poblacion, South West Poblacion, West Poblacion, North West Poblacion and West Central Poblacion).

• Nine (9) barangays with moderate to high susceptibility to flooding (Recuerdo, Mayantoc, Alemania, Cabaducan East, Amb. Alzate Village, Cabaducan West, South East Poblacion, Estacion and South Central Poblacion)

• Only one (1) barangay has a moderate susceptibility to flooding.

• The agricultural areas/farm lots have a moderate to high susceptibility to flooding.

• Localized flooding that usually subside after the rains can be attributed to inadequate drainage system during periods of unusually heavy precipitation.

17. Palayan City

• Updating of the 2005 Hazard Map (UNDP 2005)

• Barangay locations are included in the geohazard database.

• Landslide and flooding hazards are present in the city.

• Barangays with susceptibility to flooding are influenced by the Pampanga River and creeks traversing the barangays. There are generally low lying portions with moderate to high susceptibility to flooding.

• The mountainous areas have moderate to high susceptibility to landslides.

18. Municipality of Pantabangan

• There are three (3) barangays with low landslide susceptibility (East Poblacion, Malbang and Fatima).

• There are three (3) barangays with low to moderate landslide susceptibility especially along the highway and road shoulders (BLISS-San Juan, Napon- napon and Conversion).

• There is one (1) barangay with moderate to high landslide susceptibility. There are indications of old landslides in the barangay (Marikit).

• Active riverbank erosion is observed in three (3) barangays (Fatima, Cambitala and BLISS-San Juan).

• There are two (2) barangays with portions susceptible to moderate to high level floods. These barangays are located near active creeks/river and with portions that are located in generally low-lying areas. (Ganduz and Cadaclan).

19. Municipality of Peñaranda

• In terms of landslide susceptibility, no barangays in Peñaranda have the potential for landslide occurrence.

• Active riverbank erosion is observed in seven (7) barangays (Callos, San Josef, Sinasajan, Las Piñas, Sto. Tomas, Poblacion 3 and Poblacion 4).

13 • There are three (3) barangays with low susceptibility to flooding (San Mariano, Poblacion 1 and Poblacion 2).

• There are seven (7) barangays with portions susceptible to moderate to high level floods. These barangays have areas located near active creeks and river channel (Callos, San Josef, Sinasajan, Las Piñas, Sto. Tomas, Poblacion 3 and Poblacion 4)).

• In terms of landslide susceptibility, no barangays in Sasmuan have the potential for landslide occurrence.

• There are seven (7) barangays with moderate to high susceptibility to flooding (Sta. Lucia, Sta. Monica, San Antonio, San Nicolas 1 st , San Nicolas 2 nd , Sto. Tomas and San Pedro).

• There are five (5) barangays with high susceptibility to flooding. These barangays have portions that are adjacent to active creeks and river channel and are generally located in the low-lying areas (Batang 1 st , Batang 2 nd , Mabuanbuan, Sebitanan and Malusak).

• Liquefaction is possible in all barangays.

20. Municipality of Quezon

• In terms of landslide susceptibility, no barangays in Quezon have the potential for landslide occurrence.

• Active riverbank erosion is observed in seven (7) barangays (San Alejandro, Sta. Rita, Ilog Baliwag, Sta. Clara, Sto. Cristo, San Andres I and San Andres II).

• There are four (4) barangays with low susceptibility to flooding (Sto. Tomas Feria, San Miguel, San Manuel and Doña Lucia)

• There are seven (7) barangays with low to moderate susceptibility to flooding. Most of the residential area has low flooding susceptibility. Agricultural areas of the barangay has moderate to high susceptibility (Bertese, Sta. Rita, Sta. Clara, Brgy. I (Poblacion), Brgy. II (Poblacion), Dulong Bayan and San Andres I).

• There are three (3) barangays with high susceptibility to flooding. These barangays have portions adjacent to active creeks and river channel, and has naturally low-lying areas (Pulong Bahay, Sto. Cristo and San Andres II).

21. Municipality of Rizal

• There is one (1) barangay with high landslide susceptibility (Sta. Monica).

• There are three (3) barangays with low landslide susceptibility (Casilagan, Villa Paraiso and Villa Labrador).

• Active riverbank erosion is observed in one (1) barangay (Canaan East).

• These barangays are with low susceptibility to flooding (Portal, Balasing, Del Pilar, Aglipay, Bicos, Maligaya, Agbannawag, Pag-asa, Paco Roman, Cabucbucan, Canaan East, Canaan West, Gen. Luna, Casilagan, Villa Paraiso, Villa Labrador)

• Although most of the populated areas of the barangay have low susceptibility to flooding, there are barangays with portions susceptible to moderate to high level floods. These barangays have populated portions located near active creeks and the Pampanga River and with portions that are located in generally low-lying areas. (,Estrella/Subdivision, Calaocan, San Gregorio, San Esteban, Cabucbucan, Macapsing, Canaan East and Gen. Luna).

22. City of San Jose

• There is one barangay with low landslide susceptibility (Tayabo)

• There is one barangay with low to moderate landslide susceptibility (Floresta)

• There are twenty five (25) barangays with low flooding susceptibility. Isolated and localized flooding are structurally controlled and due to drainage problems. (Sto. Niño 3 rd , Sto. Niño 2 nd , Manikla, Tayabo, Malasin, Porais, Villa Joson, San Juan, Villa Marina, Kaliwanagan, Culaylay, Palestina, Pinili, Bagong Sikat, Kamanagsakan, Calaocan, Sibut, San Agustin, Abar 1 st , Sto. Tomas, Rafael Rueda, Crisanto Sanchez, Canuto Ramos, Raymundo Eugenio, F. E. Marcos)

• There are four (4) barangays with low to moderate flooding susceptibility. Localized flooding is due to absence of drainage system and overflow from silted river channels. Moderately flooded are agricultural areas and identified low portion of the barangay. (Tulat, Dizol, Abar 2 nd and Caanawan)

• There are six (6) barangays with moderate to high flooding susceptibility. Flooding is due to insufficient and clogged drainage system, overflow from silted river channels and identified low-lying areas compared to the rest of the city. (Sto. Niño 1 st , Kita-Kita, Tabulak, Parang Mangga, A. Pascual and San Mauricio)

• Active riverbank erosion is observed in three (3) barangays (Tulat, Tabulak and Parang Mangga).

23. Municipality of San Leonardo

• In terms of landslide susceptibility, no barangays in San Leonardo have the potential for landslide occurrence.

• Active riverbank erosion is observed in seven (7) barangays (Pias, Rio Chico, Poblacion East, Poblacion Centro, Poblacion West, Bago and Padolina).

• There are four (4) barangays with low susceptibility to flooding (Nazareth, San Pedro, Sampaguita and Pulong Matong).

• There is one (1) barangay with low to moderate susceptibility to sheet flooding (Concepcion)

24. Municipality of Sta. Rosa

• In terms of landslide susceptibility, no barangays in Sta. Rosa have the potential for landslide occurrence. • There are ten (10) barangays with low susceptibility to flooding (Mapalad, Malacañang, Liwayway, Tagpos, Soledad, Rajal Centro, Rajal Sur, Rajal Norte, Inspector, Sto. Rosario). • There are fifteen (15) barangays with moderate to high susceptibility to flooding (San Isidro, San Pedro, San Joseph, Maliolio, Sta. Teresita, Zamora, Gomez, San Mariano, Luna, Valenzuela, Mabini, Aguinaldo, Burgos, Tramo and Cojuangco). • There are four (4) barangays with high susceptibility to flooding. These barangays have portions that are adjacent to active creeks and river channel and

16 are generally located in the low-lying areas (La Fuente, Lourdes, Isla and Berang). • There are four (4) barangays susceptible to low, moderate to high flooding. These barangays are adjacent to creek and are with identified low-lying areas (Sapsap, Rizal, Del Pilar and San Gregorio) • .Active riverbank erosion is present in six (6) barangays (Mapalad, Malacañang, Sto. Rosario, Sapsap, Isla and Tramo). • There is possible liquefaction in one (1) barangay (Isla).

25. Municipality of Sto. Domingo

• There are sixteen (16) barangays with low susceptibility to flooding (Baloc, Buasao, Burgos, Cabugao, Casulucan, Comitang, Gen. Luna, Malasin, Malayantok, Mambarao, Poblacion, Pulong Buli, Sagaba, San Francisco, San Pascual and Sta. Rita). Brgy. Comitang has portions that are susceptible to moderate to high flooding.

• There are two (2) barangays with low to moderate susceptibility to flooding (Hulo and Sto. Rosario).

• There are five (5) barangays with moderate to high susceptibility to flooding. The barangay has naturally low-lying areas and portions located near active creeks and river channel (Concepcion, Maligaya, Dolores, San Agustin and San Fabian).

• Brgy. Mabini has portions that are susceptible to low to moderate and moderate to high level floods.

• Riverbank erosion was observed in the active creeks/river and natural channels traversing the municipality such as Talavera River, Sapang Cauayan, Papaya River and Ilog Baliwag.

• Siltation is evident along the active channels traversing the municipality.

26. Municipality of Talavera

• There are forty two (42) barangays with low susceptibility to flooding (San Pascual, Lomboy, Campos, Burnay, Valle, Calipahan, Andal Alino, Esguerra, Marcos, Mamandil, Bantug, Dinarayat, Bacal I, Bacal II, Bacal III, Matingkis, Baluga, San Miguel na Munti, Sicsican Matanda, Casulucan Este, Tabacao, Basang Hamog, Pantoc Bulac, Tagaytay, Cabubulaunan, Caputian, Mabuhay, Collado, Kinalanguyan, Sibul, Bugtong na Buli, Dimasalang Norte, Dimasalang Sur, Bantug Hacienda, Gulod, Sampaloc, Paludpod, San Ricardo, Bagong Sikat, Homestead I, Homestead II and Pinagpanaan).

• There are four (4) barangays with low to moderate susceptibility to flooding. Agricultural areas of the barangay, identified low-lying areas and those located near the creek/river channel has moderate susceptibility (Pulong San Miguel, Maestrang Kikay, La Torre, Caaminaplahan and Pula).

• There are four (4) barangays with low, moderate to high susceptibility to flooding. The barangay has naturally low-lying areas and portions located near active creeks and river channel. There are also purok of the barangays that are located below the road level, such that when the river overflows, unusually high level floods had been experienced (Matias, Poblacion Sur, Pulong San Miguel and Bulac).

• There are three (3) barangays with moderate to high susceptibility to flooding (Bagong Silang, Pagasa and Minabuyok). Silted creek channels, topographic and structure control, and being adjacent to the creek/rivers are the factors that influence flooding in the vicinity.

• Riverbank erosion was observed in the active creeks/river and natural channels traversing the municipality. Talavera River is the main drainage in the municipality. Other natural drainage include Siksikan River, Sapang Mangga, Pantoc Bulac Creek, Balasiwa Creek, Vaca Creek and Pinagpanaan Creek.

• Siltation is evident along the active channels traversing the municipality.

27. Municipality of Talugtog

• There are eighteen (18) barangays with low susceptibility to flooding (barangay centers and populated areas) in the municipality of Talugtug (Alula, Sampaloc, Maasin, Villa Rosario, Calisitan, Culiat, Saguing, Buted, Tibag, Patola, Sto. Domingo, Sta. Catalina, Osmeña, Roxas, Quirino, Magsaysay, Quezon and Cabiangan).

• There are five (5) barangays with low susceptibility to flooding in most areas but there are purok/sitio that have moderate to high susceptibility to flooding. Most of the areas affected with localized flooding are located in the low-lying portion of the barangay, agricultural areas, do not have sufficient drainage and located near the creek/river/irrigation channels traversing the barangay (Saverona, Fronda, Villa Rosenda, Villa Boado and Mayamot II).

• The are 5 (5) barangays experiencing different susceptibility to flooding from low, moderate to high depending on the topographic location (Nangabulan, Cinense, Tandoc, Mayamot and Baybayabas). These are low-lying areas affected by the overflow from the creek/rivers and excessive surface run-off coming from the

18 adjacent barangays and municipalities. Backflooding results from the inadequate drainage and exit points during unusually heavy rainy day and typhoon periods. Structurally controlled flooding such as elevated roads and road system with insufficient drainage, irrigation canals and excessive release of water from dams and temporary water impoundments are also common factors.

• The agricultural areas/farm lots have a moderate to high susceptibility to flooding.

• Localized flooding that usually subside after the rains can be attributed to inadequate drainage system during periods of unusually heavy precipitation.

28. Municipality of Zaragosa

• In terms of landslide susceptibility, no barangays in Zaragosa have the potential for landslide occurrence. • There are seven (7) barangays with moderate to high susceptibility to flooding (San Vicente, Carmen, Pantoc, Concepcion, San Isidro, Sta. Cruz and San Rafael). • There are twelve (12) barangays with high susceptibility to flooding. These barangays have portions that are adjacent to active creeks and river channel and are generally located in the low-lying areas (Sta. Lucia Young, Sta. Lucia Old, Del Pilar, Sto. Rosario Young, Sto. Rosario Old, Macarse, Mayamot, Veleriana, Batitang, Manaol, H. Romero and Gen. Luna).

It should be noted that these susceptibility ratings were arrived at as of the field assessment. However the rating could advance (e.g., from low to moderate, moderate to high) due to changing physical conditions. Hence, the MGB constantly recommends strict and continuous monitoring of the affected barangays.

Attached herewith are the matrices of the municipalities included in the assessment.

The geohazard assessment in the municipalities of Cabiao, Jaen, San Antonio and San Isidro was conducted in 2004-2005 during the Hazard Assessment along the Pampanga River. The location of the barangays was included in the geohazard data base. The data collected during this period was incorporated in the 1:50,000 Flood Susceptibility Map of the Province of Nueva Ecija.

The hazard maps of Cabanatuan City and Palayan City was initially prepared by the MGBCO-UNDP 2005 and updated during this hazard mapping and assessment project. The location of the barangays was included in the geohazard data base. The data collected during this period was also incorporated in the 1:50,000 Flood Susceptibility Map of the Province of Nueva Ecija.

MGB-RIII Assessment Team

Cecil G. Martinez Carolyn V. Sacdalan Supervising Geologist Senior Science Research Specialist

Bryan Noel Mallare Rick Rodell Luis Clarissa G. Villanueva Senior Geologist Senior Geologist Senior Geologist

Noted by:

Noel B. Lacadin OIC, Geosciences Division