Detailed Landslide and Flood Hazard Map of Tagbina

II NN DD EE XX MM AA PP :: DETAILED LANDSLIDE AND FLOOD HAZARD MAP OF 126°5'0"E 126°10'0"E TAGBINA, SURIGAO DEL SUR; AND 4217-IV-22 4217-IV-23 4217-IV-24 8°15'0"N 8°15'0"N

BUNAWAN, AGUSAN DEL SUR, PHILIPPINES BUNAWAN 4217-III-3 4217-III-4 4217-III-3 BUNAWAN BROOK QUADRANGLE 4217-III-2 126°6'0"E 126°7'0"E 126°8'0"E 126°9'0"E 4217-III-9 4217-III-7 4217-III-8 TRENTO

16 4 0 80 60 1 126°5'0"E 126°10'0"E

160 8°15'0"N 4 4 42 8°15'0"N 0 0 4 6 0 160 420 Greenfield Elementary School (Santan Juana) Purok XIIB Green Field

(Santa# Juana) 0

0 400 4

1 380 6 0 0 38 360 2 2 2 4 0 0 0 μ 0 0 340 0120.5

Kilometers

3 2 0

30 0 LL E G E N D : Main road POBLACIONP! Barangay center location

3 2 2 So. Magaling 0 0 0 Secondary road (Poblacion) Purok/Sitio location (Barangay) 80 # 2 2 80 Track; trail n School

0 6 ® 2 2 River v Hospital 20

2 4 2 0 6 0 Municipal boundary G Church 1 80 1 4 26 2 0 0 4 0 80 Contour (meter) Proposed relocation site

0 20 140 Landslide 180 0 18 8°14'0"N 8°14'0"N

0 Very high landslide susceptibility 2 2 180

2 6 0 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 240 aggravating factor.

220 Purok XIII Sta. Monica (Bunawan# Brook) High landslide susceptibility Santa Monica Elementary School Areas usually with steep to very steep slopes and underlain by (Bunawann Brook) Purok XIIIA 1 weak materials. Areas with numerous old/inactive landslides. 8 160 (Bunawan# Brook) 0 200 1 8 Moderate landslide susceptibility 0 0 8 0 1

8 1 Areas with moderately steep slopes. Soil creep and other 180

8 indications of possible landslide occurrence are present.

Low landslide susceptibility

8 1

1 80 160 Gently sloping areas with no identified landslide.

160 Debris flow / Possible accumulation zone Areas that could be affected by landslide debris.

>>>D 1 Active landslide Creep 6 0 Inactive landslide Tension crack

0 1

6 6

0 1 0 6 1 HHH 0 Landslide area with mitigating measure Gully 6

///Rock fall/Rock slide prone area Riverbank erosion 1

0 16 0

6 1 Old landslide deposits 8°13'0"N 8°13'0"N Recent landslide deposits 1 80

1 18 4 0 0 200 Areas susceptible to ground subsidence/sinkhole development

16 0 0 2 2 160 Flood

6 0 Very high flood susceptibility

0 0 2 1 0 6 0 0 1 6 1 1 Areas likely to experience flood heights of greater than 0 6 1 0 2 meters and/or flood duration of more than 3 days. 16

0 These areas are immediately flooded during heavy rains 8 1 of several hours; include landforms of topographic lows

160 such as active river channels, abandoned river channels 160 1 80 and area along river banks; also prone to flashfloods.

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

0 2 meters and/or flood duration of more than 3 days. 1 8 8 1 0 0 6 1 0 8 6 These areas are immediately flooded during heavy rains 0 8 1 0

2 of several hours; include landforms of topographic lows 00 18 such as active river channels, abandoned river channels

0 0

8 1 and area along river banks; also prone to flashfloods.

0 Moderate flood susceptibility 8 1 0 8 1 Areas likely to experience flood heights of greater than 0.5m up to 60 200 1 meter and/or flood duration of 1 to 3 days. These

1 areas are subject to widespread inundation during prolonged and 8

0 1 extensive heavy rainfall or extreme weather condition. Fluvial terraces, 80 alluvial fans, and infilled valleys are areas moderately subjected to flooding. 8°12'0"N 8°12'0"N 126°6'0"E 126°7'0"E 126°8'0"E 126°9'0"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