Detailed Landslide and Flood Hazard Map of Marihatag and Cagwait
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II NN DD EE XX MM AA PP :: 126°10'0"E 126°15'0"E DETAILED LANDSLIDE AND FLOOD HAZARD MAP OF 4218-IV-14 4218-IV-15 4218-I-11 CAGWAIT MARIHATAG AND CAGWAIT, SURIGAO DEL SUR, PHILIPPINES TA GO 8°50'0"N 4218-IV-20 SAN ISIDRO QUADRANGLE 8°50'0"N 4218-IV-19 4218-IV-20 4218-I-16 MARIHATAG 126°12'0"E 126°13'0"E 126°14'0"E 126°15'0"E 4218-IV-24 4218-IV-25 4218-I-21 SAN AGUSTIN 360 126°10'0"E 126°15'0"E 8°51'0"N 8°51'0"N 40 0 3 0 2 6 3 2 380 160 0 6 3 260 μ 180 0120.5 3 4 0 0 0 Kilometers 28 6 1 0 6 3 3 LL E G E N D : 80 4 POBLACION 0 0 0 34 Main road Barangay center location 44 42 420 P! 0 0 4 2 4 0 80 So. Magaling 52 0 0 (Poblacion) 2 Purok/Sitio location (Barangay) 1 Secondary road # 5 4 0 0 8 00 2 1 0 0 1 Track; trail n 0 School 6 0 1 6 4 River v® Hospital Municipal boundary G Church 0 56 80 Proposed relocation site 0 Contour (meter) 50 3 0 0 1 0 0 0 6 2 260 Landslide 280 360 3 0 8°50'0"N 0 8°50'0"N 2 2 300 0 Very high landslide susceptibility 2 220 0 4 2 0 0 0 8 0 0 2 2 3 6 0 2 Areas usually with steep to very steep slopes and underlain by 4 14 0 0 120 0 20 weak materials. Recent landslides, escarpments and tension 2 cracks are present. Human initiated effects could be an 2 140 40 4 200 0 aggravating factor. 260 22 0 High landslide susceptibility 2 40 Areas usually with steep to very steep slopes and underlain by 2 0 0 1 2 4 4 0 weak materials. Areas with numerous old/inactive landslides. 0 140 Moderate landslide susceptibility 220 0 0 4 2 1 Areas with moderately steep slopes. Soil creep and other 1 indications of possible landslide occurrence are present. 0 6 1 220 Low landslide susceptibility 160 0 8 Gently sloping areas with no identified landslide. 1 0 22 0 0 Debris flow / Possible accumulation zone Areas that could be affected by landslide debris. 60 >>>D 0 Active landslide Creep 8 Lucnodon 1 (Mahaba)# 40 60 Inactive landslide Tension crack 100 Landslide area with mitigating measure HHHGully 120 Palompon 20 (Mahaba) # /// 0 Rock fall/Rock slide prone area Riverbank erosion 2 6 San Roque Primary School 8 0 0 0 San Roque Daycare Center n (Mahaba) 6 (Mahaba) Caimito n San Roque Old landslide deposits 8°49'0"N 6 (San Isidro) (Mahaba)# 0 # 8°49'0"N Lanzones Recent landslide deposits (San# Isidro) 2 Durian 0 # SAN ISIDROP (San Isidro) Mangga # 2 2 (San Isidro) n Areas susceptible to ground subsidence/sinkhole development 0 # 0 80 6 2 2 n 8 0 San Isidro Elementary School 60 (San Isidro) Flood 300 0 2 Very high flood susceptibility 3 Areas likely to experience flood heights of greater than 2 meters and/or flood duration of more than 3 days. 60 These areas are immediately flooded during heavy rains of several hours; include landforms of topographic lows 0 80 6 such as active river channels, abandoned river channels 1 1 0 and area along river banks; also prone to flashfloods. 8 4 100 0 1 100 High flood susceptibility 80 80 Areas likely to experience flood heights of greater than 1 up to 80 2 meters and/or flood duration of more than 3 days. 0 2 80 1 These areas are immediately flooded during heavy rains 360 of several hours; include landforms of topographic lows such as active river channels, abandoned river channels 0 6 1 and area along river banks; also prone to flashfloods. 440 0 Moderate flood susceptibility 0 0 1 0 3 4 8 0 Areas likely to experience flood heights of greater than 0.5m up to 4 420 4 240 0 Lansones 0 1 meter and/or flood duration of 1 to 3 days. These 44 2 (Mahaba) 120 40 220 # Mahaba Elementary School areas are subject to widespread inundation during prolonged and (Mahaba) n 200 extensive heavy rainfall or extreme weather condition. Fluvial terraces, 340 2 60 2 2 0 alluvial fans, and infilled valleys are areas moderately subjected to flooding. 8°48'0"N 8°48'0"N 126°12'0"E 126°13'0"E 126°14'0"E 126°15'0"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.