Detailed Landslide and Flood Hazard Map of Lingig, Surigao Del Sur; and Boston, Davao Oriental, Philippines 4216-I-3 Pagtilaan Q

II NN DD EE XX MM AA PP :: DETAILED LANDSLIDE AND FLOOD HAZARD MAP OF 126°20'0"E 126°25'0"E TRENTO 4217-II-23 4217-II-24 LINGIG, SURIGAO DEL SUR; 4217-II-22 8°0'0"N 8°0'0"N AND BOSTON, DAVAO ORIENTAL, PHILIPPINES LINGIG 4216-I-2 4216-I-3 4216-I-4 4216-I-3 PAGTILAAN QUADRANGLE BOSTON 126°21'0"E 126°22'0"E 126°23'0"E 126°24'0"E 4216-I-7 4216-I-8

00 1 126°20'0"E 126°25'0"E 8°0'0"N 8°0'0"N

1 180

1 6 0 μ 0 8 Purok IV 0120.5 (Union)# Kilometers

0 1 0 8 1 0 1 4

0 0 10

00 0 LL E G E N D : 1 0 2 0 0 2 0 2 1 POBLACION 120 Main road P! Barangay center location

So. Magaling

160 Secondary road (Poblacion)# Purok/Sitio location (Barangay) 0

1 Track; trail n 0 School 14 160 Purok II (Union) 180 # River v® Hospital Purok I Purok V (Union) 220 2 P# 00 Purok VI (Union)# Municipal boundary G Church (Union)# Purok III (Union) 0 # 8 80 Proposed relocation site 140 Contour (meter)

140

0 4 1 2 00

80 0 8 1 Landslide 100 160 20 160 7°59'0"N 40 7°59'0"N Very high landslide susceptibility 180

0 Areas usually with steep to very steep slopes and underlain by 0 1 weak materials. Recent landslides, escarpments and tension

2 0 200 cracks are present. Human initiated effects could be an 0 80 Purok IVB Malibato (Mandus) 180 # aggravating factor.

1 20 200 High landslide susceptibility 180 1 0 1

4 4 2 0 0 1

0 Areas usually with steep to very steep slopes and underlain by

0 8

0 1 2 2 2 weak materials. Areas with numerous old/inactive landslides. 2 0 4 60 0 Moderate landslide susceptibility Areas with moderately steep slopes. Soil creep and other indications of possible landslide occurrence are present. 00 12 1 0 0 16 140

8 Low landslide susceptibility 0

0 Gently sloping areas with no identified landslide. 0 1 Debris flow / Possible accumulation zone Areas that could be affected by landslide debris. 120

0 0 Active landslide >>>D Creep Purok VI (Mandus)# 0 Inactive landslide Tension crack 12 10

140 0 4 HHH 0 1 Landslide area with mitigating measure Gully 2

0 4

/// 120 Rock fall/Rock slide prone area Riverbank erosion

Old landslide deposits

80 0 7°58'0"N 6 7°58'0"N Purok VII Recent landslide deposits Sta. Maria (Mandus)# (Pagtila-an)

# 8 0 0 12 Areas susceptible to ground subsidence/sinkhole development 0 0 6 18 140

0 80 0 1 80 80 Flood

160 Very high flood susceptibility 0 0 1

0 0 Areas likely to experience flood heights of greater than 2 4 1 1 60 2 meters and/or flood duration of more than 3 days.

0 8 8 0 These areas are immediately flooded during heavy rains 8 1 Purok VIIA Maubgob (Palo# Alto) of several hours; include landforms of topographic lows 1 2 0 80 such as active river channels, abandoned river channels Purok VII Baisan 0 (Palo Alto) and area along river banks; also prone to flashfloods. 80 6 1 #

0 14 100 High flood susceptibility

160 Areas likely to experience flood heights of greater than 1 up to

00 2 meters and/or flood duration of more than 3 days.

2 0

1 1 These areas are immediately flooded during heavy rains 4 0 0 20 of several hours; include landforms of topographic lows

Purok II such as active river channels, abandoned river channels

(Pagtila-an)# and area along river banks; also prone to flashfloods.

2 1 Moderate flood susceptibility

40 Purok I Areas likely to experience flood heights of greater than 0.5m up to # (Pagtila-an) Purok IV P # 1 meter and/or flood duration of 1 to 3 days. These (Pagtila-an)# PAGTILA-AN 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 subjected to flooding. 7°57'0"N 7°57'0"N 126°21'0"E 126°22'0"E 126°23'0"E 126°24'0"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 IV-B 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