II NN DD EE XX MM AA PP :: DETAILED LANDSLIDE AND FLOOD HAZARD MAP OF 126°10'0"E 126°15'0"E 4219-III-14 4219-III-15 TANDAG CITY (CAPITAL), , 9°5'0"N 9°5'0"N 4219-III-20 MABUA QUADRANGLE 4219-III-19 4219-III-20 TANDAG (Capital)

126°12'0"E 126°13'0"E 126°14'0"E 126°15'0"E 4219-III-24 4219-III-25 4219-II-21 TA GO

126°10'0"E 126°15'0"E 9°6'0"N 9°6'0"N μ 0120.5

Kilometers

LL E G E N D : Main road POBLACIONP! center location

So. Magaling Secondary road (Poblacion)# Purok/Sitio location (Barangay)

Track; trail n School

River v® Hospital

Municipal boundary G Church

80 Contour (meter) Proposed relocation site

Landslide 9°5'0"N

9°5'0"N Very high landslide susceptibility Areas usually with steep to very steep slopes and underlain by weak materials. Recent landslides, escarpments and tension cracks are present. Human initiated effects could be an aggravating factor. High landslide susceptibility Areas usually with steep to very steep slopes and underlain by weak materials. Areas with numerous old/inactive landslides. Moderate landslide susceptibility

PHILIPPINE SEA Areas with moderately steep slopes. Soil creep and other indications of possible landslide occurrence are present.

Low landslide susceptibility Gently sloping areas with no identified landslide.

Tabing Dagat (Mabua)# Debris flow / Possible accumulation zone Areas that could be affected by landslide debris. Sagitarius (Mabua)# Doña Nicolasa (Mabua)# Active landslide >>>D Creep

Sonny's Farm Inactive landslide Tension crack (Mabua) JDN # (Mabua)# Landslide area with mitigating measure HHHGully

///Rock fall/Rock slide prone area Riverbank erosion

Old landslide deposits 9°4'0"N 9°4'0"N Recent landslide deposits MABUAP

Quintos Phase I Areas susceptible to ground subsidence/sinkhole development (Mabua) Perez # (Mabua)# Quintos Phase II Flood (Mabua)# Very high flood susceptibility Maligaya IA (Rosario)# Areas likely to experience flood heights of greater than 2 meters and/or flood duration of more than 3 days. Maligaya I These areas are immediately flooded during heavy rains (Rosario)# of several hours; include landforms of topographic lows such as active river channels, abandoned river channels and area along river banks; also prone to flashfloods.

Maligaya II (Rosario)# High flood susceptibility Areas likely to experience flood heights of greater than 1 up to 2 meters and/or flood duration of more than 3 days. These areas are immediately flooded during heavy rains of several hours; include landforms of topographic lows such as active river channels, abandoned river channels and area along river banks; also prone to flashfloods.

Pag-asa I Moderate flood susceptibility (Rosario)# ROSARIO Areas likely to experience flood heights of greater than 0.5m up to P 1 meter and/or flood duration of 1 to 3 days. These areas are subject to widespread inundation during prolonged and

Makisama extensive heavy rainfall or extreme weather condition. Fluvial terraces, (Rosario)# alluvial fans, and infilled valleys are areas moderately

9°3'0"N subjected to flooding. 9°3'0"N 126°12'0"E 126°13'0"E 126°14'0"E 126°15'0"E Low flood susceptibility Areas likely to experience flood heights of 0.5 meter or less and/or flood duration of less than 1 day. These areas include Data Sources : Coordinate System : low hills and gentle slopes. They also have sparse to MGB Geohazard Assessment Team moderate drainage density. DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Spheroid : ...... Clark 1866 Lands Geological Survey Division Projection : ...... Transverse Mercator Geosciences Division MGB Regional Office XIII MINES AND GEOSCIENCES BUREAU Datum : ...... 1911 Direction of 1.2 National Mapping and Resource Information Authority ? Flood depth (meter) North Avenue, Diliman, City ? rising floodwater

Direction of ! Mapping scale 1:10,000 Flashflood exit point ? % ALL RIGHTS RESERVED GIS Processing : receding floodwater PUBLISHED DECEMBER 2015 Lands Geological Survey Division