Detailed Landslide and Flood Hazard Map of Sibagat

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

4118-IV-9 4118-IV-10 4118-I-6 8°55'0"N

DETAILED LANDSLIDE AND FLOOD HAZARD MAP OF 8°55'0"N SIBAGAT, AGUSAN DEL SUR, PHILIPPINES AN CITY (Capital)

SIBAGAT 4118-IV-15 4118-I-11 4118-IV-15 VILLANGIT QUADRANGLE 4118-IV-14

125°42'0"E 125°43'0"E 125°44'0"E 125°45'0"E 4118-I-16 4118-IV-20 4118-IV-19 BAYUGAN 8°50'0"N 8°50'0"N Purok II MAGSAYSAY (Magkalape)# P 125°40'0"E 125°45'0"E 8°54'0"N

8°54'0"N 42 0 Purok III 420 0 40 (Magsaysay)# 460

4 40 480 4 280

3 20

0 0 3

360 3 00

0 μ 280 0120.5 4 60

0 2 4 4 Kilometers 4 0 0 8 3 0 0 0

3 2 0 40 3 0 1 4

0 8 2 0

3 LL E G E N D : 0 0 4 POBLACION

0 Main road Barangay center location 4 P! 4 So. Magaling 0 420 8 (Poblacion) 0 2 0 Secondary road Purok/Sitio location (Barangay) 3 # 120 Purok IV (San Isidro) 300 Purok III # Track; trail n Purok VB (San Isidro) School (San Isidro) # # 1 Purok I San Isidro I Elementary School 4 (San Isidro) (San Isidro) 0 # SAN ISIDROP n River v® Hospital Purok II (San Isidro) 260 # Municipal boundary G Church

Purok VA 80 Contour (meter) Proposed relocation site Purok VI Libertad (San# Isidro) (San# Isidro)

400 0 0 1 Landslide 420 8°53'0"N

8°53'0"N Very high landslide susceptibility 340 0 26 Areas usually with steep to very steep slopes and underlain by 280 200 260 weak materials. Recent landslides, escarpments and tension cracks are present. Human initiated effects could be an 0 3 10 40 aggravating factor. High landslide susceptibility

120 Areas usually with steep to very steep slopes and underlain by 180

0 weak materials. Areas with numerous old/inactive landslides.

0 1

360 480 Moderate landslide susceptibility

40 1 2 6 0 Areas with moderately steep slopes. Soil creep and other 20 1 52 0 indications of possible landslide occurrence are present. 5 0 0 6 0 38 4 0 Purok V 240 4 Low landslide susceptibility 4 (Del Rosario)# 0 Gently sloping areas with no identified landslide.

0 32 Debris flow / Possible accumulation zone 0 40 0 8 1 4 3 3 Areas that could be affected by landslide debris. 220

0 16 0

2 1 Active landslide >>>D Creep 300

460 Inactive landslide Tension crack 480

0 HHH 4 200 4 200 Landslide area with mitigating measure Gully 0 260 0 16 2

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

400 80 Old landslide deposits 8°52'0"N

32 8°52'0"N 0 Recent landslide deposits 320 340 Areas susceptible to ground subsidence/sinkhole development

0 2 4 40 1 0 Flood 20 3 Purok III 80 (Del Rosario)#

48 0 Very high flood susceptibility

3 8 0 260 Areas likely to experience flood heights of greater than

0 2 meters and/or flood duration of more than 3 days. 4 0 0 6 Purok I 4 0 (Villangit)# These areas are immediately flooded during heavy rains Villangit Elementary School of several hours; include landforms of topographic lows (Villangit) Purok II n (Villangit) VILLANGIT # such as active river channels, abandoned river channels P Purok IA and area along river banks; also prone to flashfloods. (Villangit)#

4 4 0 High flood susceptibility

1 Purok IB 0 (Del Rosario) 0 Areas likely to experience flood heights of greater than 1 up to # 220 240 240 2 meters and/or flood duration of more than 3 days. DEL ROSARIOP These areas are immediately flooded during heavy rains of several hours; include landforms of topographic lows 0 32 0 0 4 such as active river channels, abandoned river channels Purok IA and area along river banks; also prone to flashfloods. (Del Rosario)n# Del Rosario Elementary School Moderate flood susceptibility (Del Rosario) Purok IV (Villangit)# Areas likely to experience flood heights of greater than 0.5m up to

0 1 meter and/or flood duration of 1 to 3 days. These 2 4 areas are subject to widespread inundation during prolonged and Purok IVA 0 4 4 6 (Villangit) 4 0 # 140 480 extensive heavy rainfall or extreme weather condition. Fluvial terraces,

0 500 6 alluvial fans, and infilled valleys are areas moderately subjected to flooding. 8°51'0"N 8°51'0"N 125°42'0"E 125°43'0"E 125°44'0"E 125°45'0"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