Detailed Landslide and Flood Hazard Map of Cagdianao

II NN DD EE XX MM AA PP :: 125°40'0"E 125°45'0"E

TUBAJON DETAILED LANDSLIDE AND FLOOD HAZARD MAP OF 4121-III-3 4121-III-4

CAGDIANAO AND LIBJO, DINAGAT ISLANDS, PHILIPPINES LIBJO (ALBOR) 4121-III-9 LEGASPI QUADRANGLE 4121-III-8 4121-III-9 10°10'0"N 10°10'0"N

CAGDIANAO 125°39'0"E 125°40'0"E 125°41'0"E 125°42'0"E 4121-III-13 4121-III-14

125°40'0"E 400

0 10°12'0"N 380 36 0

10°12'0"N 8 0 1 40 0 8 3 32 2 0 26 0 60 24 1 0 2 2 0 14 0 20 0 20 30 1 0 10 80 μ 0120.5

Kilometers

0 4 LL E G E N D : Main road POBLACIONP! Barangay center location 0 0 6 2 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 10°11'0"N

10°11'0"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 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. 20 Debris flow / Possible accumulation zone

60 1 00 Areas that could be affected by landslide debris. 40

Active landslide >>>D Creep 0 2 120 1 Inactive landslide Tension crack

120

1 0 HHH Purok VIII 20 8 Landslide area with mitigating measure Gully (Valencia)# ///Rock fall/Rock slide prone area Riverbank erosion

Purok I 2

1 (Valencia)# Old landslide deposits 10°10'0"N Purok III Purok II 10°10'0"N (Valencia)# (Valencia)# Recent landslide deposits v® Purok IV Valencia Health Center n(Valencia)# (Valencia) P 1 Areas susceptible to ground subsidence/sinkhole development Valencia Elementary School 0 n (Valencia) 0 60 VALENCIAn 1 0 Valencia National High School 0 1 2 (Valencia) 0 Purok V Flood (Valencia)#

12 0 Very high flood susceptibility 1 4 60 0 1 140 Areas likely to experience flood heights of greater than 00 Purok V-Delegate 2 meters and/or flood duration of more than 3 days. (Valencia)# 80 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.

60 High flood susceptibility Areas likely to experience flood heights of greater than 1 up to 1 1 2 0 0

8 2 meters and/or flood duration of more than 3 days. 0 These areas are immediately flooded during heavy rains

0 of several hours; include landforms of topographic lows such as active river channels, abandoned river channels Purok VII- Baliwan Purok VI- Baliwan (Valencia)#n (Valencia)# and area along river banks; also prone to flashfloods. Baliwan Daycare Center

0 (Valencia) Moderate flood susceptibility 4 Areas likely to experience flood heights of greater than 0.5m up to 1 meter and/or flood duration of 1 to 3 days. These areas are subject to widespread inundation during prolonged and extensive heavy rainfall or extreme weather condition. Fluvial terraces, alluvial fans, and infilled valleys are areas moderately 14 0 subjected to flooding. 10°9'0"N 10°9'0"N 125°39'0"E 125°40'0"E 125°41'0"E 125°42'0"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 : ...... Luzon 1911 Direction of 1.2 National Mapping and Resource Information Authority ? Flood depth (meter) North Avenue, Diliman, Quezon City ? rising floodwater