Bicol River
| Bicol River | |
|---|---|
Central Bikol) | |
| Location | |
| Country | Philippines |
| Region | Bicol Region |
| Province | Camarines Sur |
| Cities | |
| Physical characteristics | |
| Source | Lake Bato |
| • location | Bato, Camarines Sur and Libon, Albay, Bicol Region |
| • coordinates | 13°19′55″N 123°21′32″E / 13.33194°N 123.35889°E |
| • elevation | 6 m (20 ft) |
Calabanga, Camarines Sur, Bicol Region | |
• coordinates | 13°43′00″N 123°06′25″E / 13.71667°N 123.10694°E |
• elevation | 0 m (0 ft) |
| Length | 94 km (58 mi) |
| Basin size | 3,770 km2 (1,460 sq mi) |
| Discharge | |
| • location | San Miguel Bay (when the sea level is low) |
| • average | 165 m3/s (5,800 cu ft/s) |
| • minimum | 123 m3/s (4,300 cu ft/s) |
| • maximum | 205 m3/s (7,200 cu ft/s) |
| Basin features | |
| Tributaries | |
| • left | |
| • right | |
The Bicol River is the eighth largest river in the
Bicol Peninsula of the island of Luzon and passes through Camarines Sur province.[1]
The river starts from
estuarine mouth at San Miguel Bay. It passes through Naga City
, the alluvial and coastal plains of the vast Bicol Valley, an elongated, northwesterly trending depression in the Bicol Region, which contains alluvial plains to the coastal plain. Average slope within the river's drainage basin is 0.006%.
The basin has an influence area of 10,058 square kilometres (3,883 sq mi) including its drainage basin. It lies between 13°0 to 14°N and 123°0 and 124°0 E. It is extensively a coastal
flood plain.[2]
Geology and geomorphology
The Bicol River is bounded on the northeast by the
The main geo-morphological features found in the area include the
estuarine plain, a river flood plain, the piedmont plain and the valleys of incised creeks. The estuarine plain is level to nearly level and consists of fine fluvial-marine deposits over sandy layers with marine shells. The fluvial marine deposits are usually saline at depths of approximately 1 metre (3 ft 3 in) and includes depresses areas along the Bicol River. The river floodplain is made up of mixed alluvium. The piedmont plain on the fringe of the Ragay Hills consists of fine alluvium clay and reworked colluviums.[2]
Climate
The climate is influenced by the Northeast Monsoon winds and the
tropical cyclones that affect the area in November and December.[2]
intertropical convergence zone and topography
.
The mean temperatures are high throughout the year with the daily mean temperatures in the range of 24.1 to 28.1 °C (75.4 to 82.6 °F) and an annual mean temperature of 27 °C (81 °F).
Crossings
This is listed from mouth to source.
- Malbong Hanging Bridge (Gainza, Camarines Sur)
- Old Mabolo Bridge (Felix Plazo Street, Milaorboundary)
- Unnamed Milaorboundary
- Mabolo Bridge (
Milaorboundary) - FVR Bridge I (Milaor, Camarines Sur)
- Unnamed bridge in Bula, Camarines Sur
- Sto. Domingo Bridge (Nabua–Balatan Road, Nabua, Camarines Sur)
References
- ^ a b "Bicol River Basin and Water Management Project". Regional Development Council - Bicol Region. Archived from the original on 16 September 2008.
- ^ a b c d e Otieno, Jennifer A. (2004). "Scenario Study for Flood Hazard Assessment in the Lower Bicol Floodplain: The Philippines Using a 2D Flood Model" (PDF). International Institute for Geo-Information Science and Earth Observation. pp. 3–10. Retrieved 12 September 2008.