PHYSICAL
CHARACTERISTICS
Land Area Comprising of twenty (20) barangays, the Municipality of Trinidad has a total land area of 15,263.0344 hectares. Barangay Poblacion comprised the only urban area of the municipality covering an area of 273.68 hectares or 1.79 % of the total area. The remaining 98.2 % comprised the rural areas. Weather/Climate Climate in the Philippines has been described in terms of rainfall distribution received in a locality. One such climatic classification is the Modified Coronas. With the use of average monthly distribution of rainfall at different stations, four types of such rainfall distribution in the Philippines are defined. The climate of Trinidad is classified as “Type IV.” With this type of climate, rainfall is more or less evenly distributed throughout the year. This is also intermediate between the first and second types, although it resembles the second more closely since it has a dry season. A recent study shows that about 47% of the average annual rainfall in the country is attributed to the occurrence of tropical cyclones in its vicinity (especially from June to December). These tropical cyclones, which affect the climate of the country, generally form in the North Pacific region and generally move in west-northwest direction towards the country. The entire extreme northern portion of Luzon has the most number of cyclones affecting it in any year. In Bohol, the frequency of occurrence is one cyclone per year. The most common air currents are the northeast monsoon (from high-pressure area of Asia); the trade winds (from the Pacific); and the southwest monsoon (from the Southern Hemisphere). The general directions of winds from these sources are from north to east (October to January); from east to southeast (February to April) and southernly (May to September). Temperature and Humidity The coolest month is January with an average temperature of 26.81ºC, while the hottest month is May with an average temperature of 29.31ºC. Relative humidity is lowest in May with an average of 82% and the highest is November with an average of 86%. The pattern generally follows the season with humidity being high from June to February when precipitation is high and low for the rest of the relatively drier month. Average annual humidity is 84%. Topography and Slope The topography of Trinidad is characterized by level plains on the eastern portion, which gently undulates to hills, and mountains on the western part. The highest elevation is 259 meters above sea level located in the northwest part of the municipality. The terrain of Trinidad is generally level to undulating, with slope of 0% to 8% as these areas comprises 56.51% of the total land area. These areas are predominant in the eastern portion of the municipality. Moderately sloping to hills (8% to 30% slope) comprises 21.20%; while steep hills and mountains (30-50% slope) comprises 22.09% of the total land area. Soil Three types of soil are found in the locality: the ubay clay loam, ubay sandy loam and hydrosol. The Ubay series is the dominant soil type in the area, which developed from shale and sedimentary rocks. They are relatively mature soils, well drained and highly acidic. Potassium, phosphorus and organic content are relatively low. The eastern portion of the municipality is covered with ubay sandy loam, comprising 45.25% of the total land area. Its sandy nature is not suitable to rice production nor its porous subsoil and substratum. Ubay clay loam in the western portion covers 52.66% of the total land area. Most of the areas covered with ubay clay loam are classified as non-agricultural lands. Crop production can only be increased when fertilizers are used and irrigation is intensified. However, these soils are highly suitable to root crops such as cassavas and camote. These areas are also ideal for tree crop farming and as pasturelands. Hydrosol is found along the banks of Ipil and Soom Rivers and their tributaries. Fishponds are developing in these areas, although swamps and nipa still covers most of these areas. Erosion Potential Most areas of the municipality are classified, as having “no apparent erosion to slightly eroded” and these areas comprises 38.52% of the total land area. The remaining areas are moderately to severely eroded. Areas comprising the eastern side down to the middle portion of Trinidad are found to have no apparent erosion to slightly eroded. These areas cover 83.21% of the total number of barangays. Moderately eroded are found in Barangays Kauswagan and San Vicente. Areas having severe erosion can be found in the western portion of the Municipality, covering barangays San Vicente, Kauswagan, San Isidro and Sto. Tomas. |