To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

From Wikipedia, the free encyclopedia

Bicol River
Bicol River2.jpg
The Bicol River at Canaman
Bicol river watershed.png
Bicol River drainage area
Bicol River mouth
Bicol River (Philippines)
Native nameSalog Bikol  (Central Bikol)
RegionBicol Region
ProvinceCamarines Sur
Physical characteristics
SourceLake Bato
 • locationBato, Camarines Sur and Libon, Albay, Bicol Region
 • coordinates13°19′55″N 123°21′32″E / 13.33194°N 123.35889°E / 13.33194; 123.35889
 • elevation6 m (20 ft)
 • location
Between Cabusao and Calabanga, Camarines Sur, Bicol Region
 • coordinates
13°43′00″N 123°06′25″E / 13.71667°N 123.10694°E / 13.71667; 123.10694
 • elevation
0 m (0 ft)
Length94 km (58 mi)
Basin size3,770 km2 (1,460 sq mi)
 • locationSan Miguel Bay (when the sea level is low)
 • average165 m3/s (5,800 cu ft/s)
 • minimum123 m3/s (4,300 cu ft/s)
 • maximum205 m3/s (7,200 cu ft/s)
Basin features
 • left
  • Libmanan River
  • Sipocot River
 • right

The Bicol River is the eighth largest river in the Philippines in terms of drainage basin size with an estimated catchment area of 3,770 square kilometres (1,460 sq mi). The river drains a large part of southwestern Bicol Peninsula of the island of Luzon and passes through Camarines Sur province.[1]

The river starts from Lake Bato,[1][2] 6 metres (20 ft) above sea level, and flows 94 kilometres (58 mi) downstream to its 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]

YouTube Encyclopedic

  • 1/2
    12 224
  • river bathing in bicol
  • Camarines Sur - Albay Diversion Road


Geology and geomorphology

The Bicol River is bounded on the northeast by the Bicol Cordillera, which consists of a chain of volcanic mountains including Mount Iriga, Mount Malinao, Mount Masaraga and Mount Mayon. On the southwestern side lie the Ragay Hills, which consists of folded and faulted sedimentary formations including limestones, siltstones, conglomerates and shale. In between these higher areas lies the Bicol plain, which is composed of thick alluvial deposits of sand silt and clay.[2]

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]


The climate is influenced by the Northeast Monsoon winds and the Pacific trade winds. These Monsoon winds create the low pressure area in the Pacific Ocean, resulting in tropical cyclones that affect the area in November and December.[2]

Rainfall occurs throughout the year with low rainfall between January to May and high rainfall between June and December. In the lower basin, mean annual rainfall ranges between 1,850 to 2,300 millimetres (73 to 91 in). The main factors influencing rainfall are the air streams, the 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).


  1. ^ a b "Bicol River Basin and Water Management Project". Regional Development Council - Bicol Region. Archived from the original on 16 September 2008.
  2. ^ 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.
This page was last edited on 25 May 2021, at 04:13
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.