San Jose has a total land area of 4,702.8146 hectares and is bounded in north by
Lagonoy, south by
Tigaon, east by
Lagonoy Gulf, and west by
Goa. The whole town is roughly 0.27% of the region's 1.76 million hectares; 0.89% of the total land area of
Camarines Sur with an area of 526.680 square kilometers; and 2.26% of the total land area of the 4th Congressional District of
Camarines Sur with an area of 207,596.71 hectares.
Barangays San Jose is politically subdivided into 29
barangays. Each barangay consists of
puroks and some have
sitios. •
Adiangao •
Bagacay •
Bahay •
Boclod •
Calalahan •
Calawit •
Camagong •
Catalotoan •
Danlog •
Del Carmen (
Poblacion) •
Dolo •
Kinalansan •
Mampirao •
Manzana •
Minoro •
Palale •
Ponglon •
Pugay •
Sabang •
Salogon •
San Antonio (
Poblacion) •
San Juan (
Poblacion) •
San Vicente (
Poblacion) • Santa Cruz (
Poblacion) •
Soledad (
Poblacion) •
Tagas •
Tambangan •
Telegrafo •
Tominawog Climate {{Weather box {{cite web The municipality belongs to Type II Climate
Topography The terrain of the municipality which is particularly described as
fluvicatile lacustrine alluvium composed of unsorted loosely consolidated pebbles, gravel, silt, coral debris and clay that can be found in flooded plains, riverbanks, sand bars, beaches, and tidal flats. It is notable that river terraces along the
Lagonoy River and its tributaries which include also the Rangas River that practically originating from the foot of the
Mount Isarog account for about 90.69% or 4,264.9826 hectares of the total land area of the municipality while the rest is of igneous and metamorphic rock origin of which volcanoclast alluvial fans cover about 0.19% or 8.94 hectares. These are specifically found in barangays
Catalotoan and
Salogon. Note that volcanoclast is a thick and extensive pyroclastic material consists of ashes, cinder lapili, tuff agromerate and volcanic debris while alluvial fans consists only of worked pyroclastics. Source:
Municipal Comprehensive Landuse Plan & Zoning Ordinance (2000-2010) On the other hand, barangay
Adiangao is composed of igneous and metamorphic rocks classified as Basement Complex. It is characterized as highly fractured and folded complex consisting of quartzite, quartzatedspathit and mica schists that cover roughly 5.26% or 247.37 hectares. Meanwhile, the lower part of the place is composed of sedimentary rocks known as crystalline limestone which covers about 3.86% or 181.53 hectares. Crystalline limestone is an extensive transgressive rectal carbonated facies including wall preserved bushes of corals, megafossils and algae structure, detritae to fuffacious limestone showing well developed karst landforms or formation that can be found prevalent in the
Caramoan Peninsula.
Landforms The many landforms found in the municipality have been the natural production of the different geographical pressures of the different structural land forms such as alluvial lowland, alluvial fans, sedimentary plateau or masses of residual slopes and thick sedimentary landscapes. Most of its territorial areas are best characterized by broad alluvial plans described as level to nearly level, and moderately well-drained terraces. The level to undulating plains are the product of paludal environment or deltaic plains which are usually being flooded during slight and heavy downpours. On the other hand, Barangay
Adiangao is characterized by Shale/Sandstone Hills (SSH) which is described to be undulating to rolling, slightly to moderately dissected, and moistly top-rounded hills, both are low and high relief. Likewise, steep slopes are dissected closely with each other particularly those with greater than 18o inclinations. Meanwhile, V-shaped valleys are noted to have been composed and dominated by sandstone. Likewise, landforms in barangays
Dolo,
Sabang, part of
Minoro,
Manzana and
Tagas are noted to be flat with very poorly drained terrains and oftentimes affected by floods caused by high tides. The coastal plains are most commonly swarmed with mangroves, nipa plants, break rides, swales and tidal flats.
Major Types of Land Management Units The municipality is composed of 5 major types of Land Management Units (LMUs) which are classified into 2 forms, namely: Warm Lowland and Warm Cool Hillyland. They are enumerated and explained below. Warm Lowland: • Tidal Flats (LMU 02) is very deep, fine loamy dark grayish brown but sometimes coarse loamy grayish soil, medium acid to mildly alkaline reaction, low available P and CaMg but adequate with O.M., constant extractable KBSP and CEC; generally moderate fertility level, very low infiltration and moderate to slow permeability rate, submerged and very poorly drained. • Beach Ridges and Swales (LMU 03) is shallow to moderately deep, very dark brown, coarse, and loamy underlain by sandy skeletal substratum; slightly acid to mutual moderate CaMg and CEC; available highly extractable K acid; BSP generally moderate fertility level; rapid to very rapid infiltration and rapid to moderate rapid permeability rate, and excessively drained. • Estuarin Plain (LMU 04) is deep to very deep clay, predominantly very dark brown, yellowish brown, coarse, loamy underlain by sandy skeletal substratum; medium acid to neutral soil reaction; moderate exchangeable K, high O.M. content, available P, BSP and CEC; generally high fertility level; slow to very slow infiltration and rapid to moderately rapid permeability rate, and moderately well to poorly drained. • Broad Plain (LMU 09) is moderately deep and sometimes shallow predominantly brown fine, loamy and sometimes coarse, loamy sub-soil underlain by coarse loamy skeletal stratum; strong acid to slightly acid, moderately available P, extractable K and Ca/Mg; adequate O.M. content CEC and BSP, moderate general fertility level; very slow to very rapid permeability rate, poorly to well drained, none to moderate flooding. Warm Cool Hillyland: • Shale/Sandstones Hills (LMU 70) is moderately shallow to very deep, predominantly dark, yellowish brown, and strong fine loamy and sometimes clayey subsoil underlain by skeletal substratum; medium soil to mildly alkaline reaction, low O.M. content and available P, high extractable K, Ca/Mg, BS and CEC generally moderate fertility level, slow to moderate permeability, moderate to well drained.
Soil classifications The soil map reveals that the municipality is composed of 9 soil types, namely: •
Dolo Sandy clay loam and sandy loam •
Minoro Loam • Venagre Clay loam and sandy loam • Huyon-huyon Sandy loam •
Kinalansan Silty clay loam and Clay • Magsaysay Sandy Loam • San Miguel Silty Loam • Porous rocks & clay load • Sandy soil It is also noted that the soil composition of the low-lying areas is rich loamy characterized as broad alluvial plains. However, the inherent soil fertility is generally moderate because of the moderate levels of calcium and magnesium contents that would be adequate for normal growth of crops. Meanwhile, the solids of the coastal plains are generally deep to poorly drained while beach ridges are shallow, coarse and loamy. These areas are noted to be moderately fertile due to low organic matter content; while some areas are poorly drained and prone to tidal floods usually occurring in barangays
Sabang,
Dolo, and
Kinalansan. On the other hand, soils that came from shales and sandstones can be found in barangay
Adiangao. These are noted to be moderately shallow to moderately deep, fine loamy to clayey. Generally, it is high in fertility brought about by adequate levels of soil reaction, organic matter content, and permeability. However, soil limitations may include heavy texture, erosion hazard, surface stoniness as well as the presence of rock outcrops and shallow soils.
Soil Erosion and Landslide Susceptibility The lands that are prone to erosion account for about 8.04% of the total land area and they have slopes ranging from 30%-50%. However, the erosion map of the municipality revealed that only 8.49% of the total land area are observed to be slightly eroded while no apparent erosion occurred in the rest of the territory. Source: MPT Estimates
Flooding hazard It has been noted that most of the municipal area or 92.14% is free from the hazards of flooding. However, there is a slight seasonal flooding or about 1.67% that usually occur in barangay
Minoro and in the northern part of
Dolo which covers about 78.54 hectares. The flood reaches a depth of less than 0.5 to 1.0 meter after heavy downpour. It would usually recede within 12 hours to a maximum of one day. Likewise, seasonal flooding is moderately experienced in some portions of barangays
Dolo,
Manzana,
Kinalansan,
Telegrafo and
Calalahan with a depth of about 0.75 to 1.50 meters which would usually recedes within a few days only. Source:
Municipal Comprehensive Landuse Plan & Zoning Ordinance (2000-2010) Rivers and creeks There are a number of creeks and rivers that crisscross the municipality and all draining towards
Lagonoy Gulf. These bodies of water are being feed by spring sources from
Mt. Isarog. These rivers and creeks are most frequently being utilized not only for irrigation purposes of existing paddies but also for the day to day human activities such as bathing and washing.
Marine ecosystem The municipality has a total length of shoreline along
Lagonoy Gulf of 11.30 km. which is about 3.15% of the 358.70 km. of shoreline found within the 4th District of
Camarines Sur. The fine beach sand in the area makes it suitable for natural harbors as well as refuge for ships and motorbancas during the peak of weather disturbances. Moreover, a variety of marine life and species are notably abounding in the municipal waters that provided a rich source of livelihood among coastal families. At present, there are two separate municipal ports, one located in barangay
Sabang and the San Jose Fishing Port in Sitio Talisay, of barangay
Dolo. They most frequently served as docking points for both inter-island passenger motorbancas and fishing vessels operating in
Lagonoy Gulf.
Land classification The entire land area of San Jose with 4,702.8146 hectares is classified as alienable and disposable. The existing land use and vegetation is composed of 62.04% for Paddy rice irrigated with 90-100% dominant land use; 26.48% for Coconuts; 7.33% for Build-up areas; 2.54% for Mangrove-tree type; and 1.61% for Beach sand. Source:
Municipal Comprehensive Landuse Plan & Zoning Ordinance (2000-2010) Primelands The primelands of the municipality have been categorized into three (3), namely: Agricultural, Forestry, and Miscellaneous areas. Source:
Municipal Comprehensive Landuse Plan & Zoning Ordinance (2000-2010) The agricultural areas is composed of about 82.09% or 3,860.54 hectares consisting the 2,918.0965 hectares of irrigated paddy riceland and 942.4440 hectares of coconut plantation. Forestry areas cover 414.7883 hectares, of which about 3.51% or 14.5787 hectares each compose the preservation forest and agro-forestry areas; while 19.61% or 81.3587 hectares are both mangrove trees and nipa plants categorized also as preservation areas. On the other hand, built-up areas is only about 7.05% of 331.5484 hectares of the total land area of the municipality. Furthermore, based on the Pedo-ecological Zone Map of the town, around 90.13% or 4,238.6468 hectares of the total land area are under the warm lowland zone with a slope not greater than 8% and elevation of 100 meters above sea level. In the same context, about 8.35% or 392.6850 hectares are categorized as warm cool hilly land, usually found in barangay
Adiangao; and miscellaneous areas composed the so-called Miscellaneous areas which is about 1.52% or with a land area of about 71.4828 hectares. Meantime, the details on pedo-ecological zone based on the total land area can be found in the table below: Source:
Municipal Comprehensive Landuse Plan & Zoning Ordinance (2000-2010) Land Use Opportunity Based on the table below, the Land Use Opportunity Map of the municipality indicate that there are four classes of land use opportunity available which include 83.76% or 3,939.08 hectares for active agricultural areas; 5.18% or 243.61 hectares for rehabilitation areas; 2.17% or 102.05 for wetland areas; and 8.89% or 418.08 hectares for miscellaneous land usage. More specifically, the active agricultural areas though used for agricultural cultivation can be intended for complementary uses for human settlements and infrastructure development such as the construction of roads, bridges, and irrigation facilities. Meanwhile, the miscellaneous land areas may also include the built-up areas, river wash and other miscellaneous land usages. Source:
Municipal Comprehensive Landuse Plan & Zoning Ordinance (2000-2010) Existing Land Use and Vegetation The agricultural land areas composed about 88.52% of the total land area or 4,162.9315 hectares are planted with both palay and coconut trees. On the other hand, the wetland areas cover about 2.54% of the total land areas with 119.4515 hectares and 1.61% composed the sandy beaches with the land area of 75.7153 hectares; while about 7.33% or 344.7163 hectares consisted the built-up land areas. Details are shown in the table below: Source:
Municipal Comprehensive Landuse Plan & Zoning Ordinance (2000-2010) Mineral Resources The municipality has been endowed with a variety of mineral resources because of its diverse geological terrain which are partly located within the mountain ranges of
Caramoan Peninsula. It has been known that the
marble deposit in barangay
Adiangao has an estimated volume of 71,772,912 metric tons; and it has been contained along the Maangas-Adiangao area and believed to be suitable for
dimension stones. There is noted also a considerable amount of deposit of "guano" inside the
Adiangao Caves. On the other hand, high quality sand, gravels and boulders are abundantly found along the Rangas River traversing barangays
Bagacay,
Mampirao,
Pugay,
Calalahan,
Tambangan and
Calawit.
Volcanoes, Faults, and Earthquake Belt The parallel location of the
Bicol Volcanic Belt, or
Philippine Fault Zone, to the
Deep Philippine Trench practically contributed to the triangulated distribution of events with faults or volcanic abnormalities within the earthquake belts in the Bicol Region. It has been observed that the
Bicol Volcanic Belt or Chain had a span of 240 km. from
Camarines Norte in the North down to
Sorsogon in the South with a total of 16 volcanoes separately spread over by about 24 km. apart and rested parallel along the 200 km. chain west of the
Philippine Trench, which is the major source of earthquake in the region. The trench can be described as a long, narrow, and generally steep-sided very deep depression in the ocean floor. The axis of a trench marks, the position of a subduction zone where old oceanic lithospheric plates begin their descent into the Earth's interior. In 1987, a study was conducted which reveals that the
Bicol Region particularly the location of San Jose is a part prone to earthquakes of intensify 5 from the above-cited source zones. Based on the frequency of volcanic eruptions that occurred in the region, there are three prominent volcanoes which are considered to be active, namely:
Mt. Mayon,
Mt. Bulusan, and
Mt. Iriga (Asog). The latter is the nearest to the Municipality of San Jose.
Mount Iriga (Asog) has a peak of 1,143 meters above sea level and classified to be "stratovolcanoe" or it has a composite cone like that of
Mt. Mayon and last record of eruption was in 1628 A.D. which eventually damned the Barit River but consequently created the
Lake Buhi, the home of the smallest fish in the world with scientific name
Pandaka pygmaea locally known as "tabios." ==Demographics==