Rio Grande de Mindanao

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Rio Grande de Mindanao (Mindanao River)
Tamontaka River, Cotabato River, Pulangi River
Rio Grande de Mindanao (Cotabato City).jpg
Rio Grande de Mindanao
Country Philippines
Regions Northern Mindanao, SOCCSKSARGEN, ARMM
Tributaries
 - left Allah River, Buluan River
 - right Pulangi River, M'lang River , Simuay River
Cities Malaybalay City, Valencia City, Kidapawan City, Koronadal City, Cotabato City
Source Kitanglad Mountain Range
 - location Brgy. Kalabugao, Impasugong, Bukidnon, Northern Mindanao
 - coordinates 8°27′15″N 125°09′46″E / 8.45417°N 125.16278°E / 8.45417; 125.16278
Mouth Illana Bay
 - location Cotabato City, SOCCSKSARGEN
 - elevation 0 m (0 ft)
 - coordinates 7°13′25″N 124°14′47″E / 7.22361°N 124.24639°E / 7.22361; 124.24639Coordinates: 7°13′25″N 124°14′47″E / 7.22361°N 124.24639°E / 7.22361; 124.24639
Length 320 km (199 mi) [1]
Basin 23,169 km2 (8,946 sq mi) [2]
Mindanao river drainage map.png
Drainage map of Mindanao River

The Rio Grande de Mindanao, also known as the Mindanao River is the second largest river system in the Philippines, located on the southern island of Mindanao. It has a drainage area of 23,169 km2 (8,946 sq mi),[2] draining the majority of the central and eastern portion of the island. With a total length of approximately 320 km (200 mi).[1][3] It is an important transportation artery on the island, used mainly in transporting agricultural products and, formerly, timber.

Its headwaters are in the mountains of Impasugong, Bukidnon, south of Gingoog City in Misamis Oriental, where it is called the Pulangi River. Joining the Kabacan River, it becomes the Mindanao River. Flowing out of the mountains, it forms the center of a broad, fertile plain in the south-central portion of the island. Before its mouth in the Illana Bay, it splits into two parallel sections, the Cotabato and Tamontaka, separated by a 180 metres (590 ft) hill.

Population centers along the river include Cotabato City, Datu Piang, and Midsayap.

Course[edit]

1917 map of the delta of the Mindanao River

The Rio Grande de Mindanao has its source in the Central Mindanao Highlands near the northern coast of the island, specifically on the northeastern part of the province of Bukidnon, where it is known as the Pulangi River. It then flows southward across the Bukidnon Plateau, fed up by its tributaries along the way and then emerges onto the Cotabato plains, depositing fertile mountain silt as it widens and arcs westward through the Cotabato River Basin. It finally empties into Illana Bay at its mouth at Cotabato City.

As the Mindanao River meets Illana Bay, it branches out into two distributaries, the Cotabato in the north and the Tamontaka in the south at Cotabato City.

Tributaries[edit]

Water hyacinths[edit]

The river has recently been clogged with water hyacinths, causing it to overflow after days of heavy rain. Floodwaters submerged at least 37 villages in Cotabato City alone and displaced some 6,000 families.

President Benigno Aquino III ordered public works and military personnel to clear the river of up to 20 hectares of water lily growth.[4]

References[edit]

  1. ^ a b "Mindanao River - River, Philippines". www.britannica.com. Encyclopedia Britannica. July 20, 1998. Retrieved 5 April 2017. 
  2. ^ a b Vicente B. Tuddao Jr. (September 21, 2011). "Water Quality Management in the Context of Basin Management: Water Quality, River Basin Management and Governance Dynamics in the Philippines" (PDF). www.wepa-db.net. Department of Environment and Natural Resources. Retrieved 5 April 2017. 
  3. ^ "Principal River Basins of the Philippines", Published by the National Water Resources Board, October 1976 (p. 12)
  4. ^ "Aquino leads ‘war vs water hyacinths’". Philippine Daily Inquirer. June 23, 2011. Retrieved 2011-06-22. 

External links[edit]