Rio Grande de Mindanao
|Rio Grande de Mindanao (Mindanao River)|
|Tamontaka River, Cotabato River, Pulangi River|
Rio Grande de Mindanao is the longest river in Mindanao and the second largest in the Philippines
|Regions||Northern Mindanao, SOCCSKSARGEN, ARMM|
|- left||Allah River, Buluan River|
|- right||Pulangi River, M'lang River|
|Cities||Malaybalay City, Valencia City, Kidapawan City, Koronadal City, Cotabato City|
|- location||Brgy. Kalabugao, Impasugong, Bukidnon, Northern Mindanao,
Mount Apo Side North Cotabato,
|Mouth||Mouth of the Mindanao River|
|- location||Illana Bay, Cotabato City, SOCCSKSARGEN|
|- elevation||0 m (0 ft)|
|Length||373 km (231.77 mi)|
|Basin||23,169 km2 (8,945.6 sq mi)|
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. 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). 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 Moro Gulf, it splits into two parallel sections, the Cotabato and Tamentaka, separated by a 180 m (600 ft) hill.
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.
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.
- Kundel, Jim (June 7, 2007). "Water profile of Philippines". Encyclopedia of Earth. Retrieved 2008-09-30.
- "Principal River Basins of the Philippines", Published by the National Water Resources Board, October 1976 (p. 12)
- "Aquino leads ‘war vs water hyacinths’". Philippine Daily Inquirer. June 23, 2011. Retrieved 2011-06-22.
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