Rio Grande de Mindanao

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Coordinates: 7°13′25″N 124°14′47″E / 7.22361°N 124.24639°E / 7.22361; 124.24639
Rio Grande de Mindanao
Mindanao River, Cotabato River, Pulangi River
River
Rio Grande de Mindanao (Cotabato City).jpg
Rio Grande de Mindanao is the longest river in Mindanao and the second largest in the Philippines
Country Philippines
Regions Northern Mindanao, SOCCSKSARGEN, ARMM
Tributaries
 - left Allah River, Buluan River
 - right Pulangi River
Cities Malaybalay City, Valencia City, Kidapawan City, Koronadal City, Cotabato City
Source
 - location Brgy. Kalabugao, Impasug-ong, Bukidnon, Northern Mindanao
 - coordinates 8°27′15″N 125°09′46″E / 8.45417°N 125.16278°E / 8.45417; 125.16278
Mouth Mouth of the Mindanao River
 - location Illana Bay, 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; 124.24639
Length 373 km (231.77 mi)
Basin 23,169 km2 (8,945.6 sq mi)
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, after the Cagayan River of Luzon.[1] It is the largest river on the southern island of Mindanao with a drainage area of 23,169 km2 (8,946 sq mi) draining majority of the central and eastern portion of the island. It is also the second longest river in the country with a length of approximately 373 km (232 mi).[2] 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 Impasug-ong, 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 Moro Gulf, it splits into two parallel sections, the Cotabato and Tamentaka, separated by a 180 m (600 ft) hill.

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

Course[edit]

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 1,000-square-mile (2,600 km2) Cotabato River Basin. It finally empties into Illana Bay at its mouth in Cotabato City.

Details of the delta of the Mindanao River

Tributaries[edit]

River Delta[edit]

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.

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.[3]

References[edit]

  1. ^ Kundel, Jim (June 7, 2007). "Water profile of Philippines". Encyclopedia of Earth. Retrieved 2008-09-30. 
  2. ^ "Principal River Basins of the Philippines", Published by the National Water Resources Board, October 1976 (p. 12)
  3. ^ "Aquino leads ‘war vs water hyacinths’". Philippine Daily Inquirer. June 23, 2011. Retrieved 2011-06-22.