Topography

Geology and Land Form

Underlying rock structure of Pagadian City as well as its actual surface from with references underlying geology, slope and form is shown in Table 1.4.

 

Table 1.4
GEOLOGY AND LANDFORM
Pagadian City

BARANGAY GEOLOGY LANDFORM
Alegria
Balintawak
Balangasan
Baloyboan
Banale
Bogo
Bomba
Buenavista
Igneous Psyroclastics
Igneous Psyroclastics
Igneous Psyroclastics
Igneous Psyroclastics
Igneous Psyroclastics
Igneous Psyroclastics
Igneous Psyroclastics
Igneous Psyroclastics
High moderately dissected basaltic hills Low moderately dissected basaltic hills
High moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
High moderately dissected basaltic hills
BARANGAY GEOLOGY LANDFORM
 

Bulatoc
Bulawan
Dampalan
Danlugan
Dao
Datagan
Deborok
Ditoray
Dumagoc
Gatas
Gubac
Gubang
Kagawasan
Kahayagan
Kalasan
Kawit
La Suerte
Lenienza
Lala
Lapedian
Lison Valley
Lourdes
Lower Sibatang
Lumad
Lumbia
Macasing
Manga
Muricay
Napolan
Palpalan
Pedulonan
Poloyagan
San Francisco
San Jose
San Pedro
Sta. Lucia
Sta. Maria
Santiago
Sto. Niño
Tawagan Sur
Tiguma
Tuburan
Tulangan
Tulawas
Upper Sibatang
White Beach

Igneous Psyroclastics
Igneous Psyroclastics
Igneous-Basalt-Andesite
Igneous-Basalt-Andesite
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Quaternary Volcanic
Igneous- Psyroclastics
Sedimentary-recent Alluvium
Igneous- Quaternary Volcanic
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Sedimentary-recent
Igneous-Basalt-Andesite
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Sedimentary-quaternary Volcanic
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Sedimentary-recent Alluvium
Sedimentary-recent Alluvium
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Igneous- Psyroclastics
Sedimentary-quaternary Volcanic

 

Low moderately dissected basaltic hills
Basaltic Plateau
High moderately dissected basaltic hills
Basaltic Plateau
Low moderately dissected basaltic hills
Basaltic Plateau
High moderately dissected basaltic hills
High moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Basaltic Plateau
Basaltic Plateau
Basaltic Plateau
High moderately dissected basaltic hills
Low slightly dissected basaltic hills
Tidal flat, undeveloped
Basaltic Mountain
Low moderately dissected basaltic hills
High moderately dissected basaltic hills
Basaltic Plateau
Upland alluvial plain alluvium
High severely dissected Andes tic basaltic hills
High moderately dissected basaltic hills
High moderately dissected basaltic hills
Low moderately dissected basaltic hills
Basaltic Plateau
Low moderately dissected basaltic hills
Tidal flat, undeveloped
Low moderately dissected basaltic hills
High moderately dissected basaltic hills
High moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Elevated alluvial back plain
Elevated alluvial back plain
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
Low moderately dissected basaltic hills
High moderately dissected basaltic hills
Tidal flat, undeveloped

Source: Municipal Planning Directory (Land Use Information System). Pagadian City

 

Natural Drainage

Due to the city’s terrain, majority of its barangays approximately 92% are classified as moderately well drained to well drained. Areas located in the Southern portion of the city, near Pagadian Bay are poor to very poorly drained.

Rivers and their tributaries form the natural drainage in the area. In the poblacion, which is composed of 13 urban barangays with a total area of 848.482 hectares or 23%, there are four major rivers namely: Balangasan River, Gatas River, Bulatoc River and Tiguma River. All these rivers carry water load to Pagadian Bay.

Labangan River is the only major river in the rural barangays. This particular river has three (3) major tributaries, which passes through Barangays Bulawan, Macasing, Lower Sibatang, Deborok and Lourdes. These tributaries carry its load to Illana Bay at the municipality of Labangan.

 

Erosion Potential

Areas in the city that are susceptible to erosion are located in the northwestern portion with strongly sloping landscape and steep hills and mountains covering a total area of 15,090 hectares or 45% of the total area of the city.

 

Flooding Hazards

Majority of the fifty-four (54) barangays of the city does not experience flooding due to the elevation and other physical characteristics of these barangays. However, during heavy rains, the southern and most the eastern part of the city, which are level or nearly level areas, will sometimes experience flooding especially when waters overflow the street canals. These are cover approximately 8% of the area of the city.

 

Soil

The type of soil found in the city as reflected in the soil map are Alamunos/Antipolo complex, Lousiana/Jasan Complex Hydrosol, Buyogan Clay Loam, and Mt. Soil Undifferentiated.

Given these type of soil, the average soil bearing capacity is 4,000 PST with an average soil temperature of 20.0 Deg. Celsius.

Table 1.5 & Table 1.6 show the soil physical and chemical characteristics, respectively. A vast land area has an acidic soil chemical characteristics, approximated to 32,475 hectares.

 

Table 1.5
SOIL PHYSICAL CHARACTERISTICS

DEPTH LAND AREA
(HAS.)
TEXTURE LAND AREA
(HAS.)
Shallow (25-50 cm)
Moderately deep (50-100 cm)
Deep (1m)
21,145
1,055
11,180
Fine

33,380

TOTAL 33,380 33,380

Table 1.6
Soil Chemical Characteristics

pH

Land Area

Fertility

Land Area

Weakly Acid to Neutral
Acid
Strongly Acid
Alkaline

1,204
28,601
2,834
741

Low


30,718
2,662

Total

33,380

33,380

 

Source:  (Land Use Information System)
Municipal Planning Directory, Pagadian City