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Detailed Landslide and Flood Hazard Map of Bislig City, Surigao Del Sur, Philippines 4217-Ii-7 Comawas Quadrangle

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Detailed Landslide and Flood Hazard Map of Bislig City, Surigao Del Sur, Philippines 4217-Ii-7 Comawas Quadrangle II NN DD EE XX MM AA PP :: 126°20'0"E DETAILED LANDSLIDE AND FLOOD HAZARD MAP OF 4217-II-1 4217-II-2 4217-II-3 BISLIG CITY, SURIGAO DEL SUR, PHILIPPINES 4217-II-6 4217-II-7 4217-II-8 4217-II-7 COMAWAS QUADRANGLE BISLIG CITY 8°10'0"N 8°10'0"N 126°18'0"E 126°19'0"E 126°20'0"E 126°21'0"E 4217-II-11 4217-II-12 4217-II-13 LINGIG TRENTO Purok XII Airport (Poblacion)# 126°20'0"E 8°12'0"N 8°12'0"N Purok XV Core Shelter (Poblacion)# μ 0120.5 BISLIG BAY Kilometers Mancarogo Purok XIII (Poblacion)# n Bliss Mancarogo DayCare Center Recaredo Central Elem. School (Poblacion) (Poblacion) n Mancarogo Purok XIV (Poblacion)# LL E G E N D : Main road POBLACIONP! Barangay center location So. Magaling (Poblacion) Bongaitan Purok I Secondary road # Purok/Sitio location (Barangay) (Mangagoy)# Purok III (Comawas)# Track; trail n School Manggawong Purok II River v® Hospital (Mangagoy)# # Manggawong Purok IA Municipal boundary G Church Gamaon Purok III (Mangagoy) (Mangagoy) # Purok I # Gamaon Purok IV (Comawas) Proposed relocation site # Gamaon Purok II (Mangagoy)# 80 Contour (meter) Purok VI (Mangagoy) n (Comawas)# # Gamaon Purok V Gamaon Purok I Purok II (Mangagoy)# (Mangagoy) (Comawas) Purok V # Castillo Purok VI nP# (Comawas)# (Mangagoy) Cumawas DayCare Center # Landslide COMAWAS (Cumawas) Pedraverde-Lindo Elem. School Santa Krus Church (Mangagoy) n Castillo Purok IVA 8°11'0"N Purok IV (Cumawas) $ (Mangagoy) 8°11'0"N (Comawas)# # 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. Purok VII Mainit (San# Isidro) High landslide susceptibility Purok II Casunogan (San# Isidro) Areas usually with steep to very steep slopes and underlain by Mangagoy Nat'l High School weak materials. Areas with numerous old/inactive landslides. (Mangagoy)n Moderate landslide susceptibility Areas with moderately steep slopes. Soil creep and other Panaghiusa Purok IV (Mangagoy)# indications of possible landslide occurrence are present. Low landslide susceptibility Gently sloping areas with no identified landslide. Debris flow / Possible accumulation zone Areas that could be affected by landslide debris. Active landslide >>>D Creep Inactive landslide Tension crack Purok V HHH (San Antonio)# Landslide area with mitigating measure Gully ///Rock fall/Rock slide prone area Riverbank erosion Old landslide deposits 8°10'0"N 8°10'0"N Recent landslide deposits Areas susceptible to ground subsidence/sinkhole development Flood Very high flood susceptibility Areas likely to experience flood heights of greater than Purok IV 2 meters and/or flood duration of more than 3 days. (San Antonio)# 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. High flood susceptibility Healthv® Center Purok I Areas likely to experience flood heights of greater than 1 up to (San Antonio)# SANP ANTONIO 2 meters and/or flood duration of more than 3 days. nPurok II These areas are immediately flooded during heavy rains (San Antonio)# 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. Moderate flood susceptibility 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 8°9'0"N subjected to flooding. 8°9'0"N 126°18'0"E 126°19'0"E 126°20'0"E 126°21'0"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 Direction of ! Mapping scale 1:10,000 Flashflood exit point ? % ALL RIGHTS RESERVED GIS Processing : receding floodwater PUBLISHED DECEMBER 2015 Lands Geological Survey Division.
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