Ilagan River

Ilagan River is a river in the province of Isabela, Cagayan Valley, Philippines. It is one of the major tributaries of the Cagayan River, the largest river in the Philippines. The Ilagan River originates from the western slopes of the Sierra Madre and drains the eastern central portion of the Cagayan River basin. It has an estimated catchment basin size of 3,132 square kilometres (1,209 sq mi)[2] and an estimated annual discharge of 9,455 million cubic meters/s. It flows westward and joins the Cagayan River at Ilagan City, Isabela.[1]

Ilagan River
Ilagan River as it passes through the municipalities of San Mariano (background) and Benito Soliven (foreground).
Ilagan River mouth
Ilagan River (Philippines)
Native namePinacauan De Ilagan
Location
CountryPhilippines
RegionCagayan Valley
ProvinceIsabela
Physical characteristics
SourceSierra Madre mountains
  locationCasiguran, Aurora, Central Luzon
  coordinates16°18′42.47″N 121°59′6.98″E
MouthCagayan River
  location
Ilagan, Isabela
  coordinates
17°10′7.75″N 121°53′16.85″E
Length189 km (117 mi)
Basin size3,132 km2 (1,209 sq mi)
Discharge 
  average270 m3/s (9,500 cu ft/s)[1]
Basin features
ProgressionIlagan River – Cagayan River
Tributaries 
  right
  • Abuan River
  • Bintacan River

Tributaries

Ilagan River at Ilagan City

Major tributaries of Ilagan River are:

  • Abuan River – originates from the mountains in the Northern Sierra Madre National Park where one of the widest tropical rainforests in the Luzon can be found.
  • Bintacan River

References

  1. "The Cagayan River Basin". ABS-CBNNews.com. Retrieved 20 March 2014.
  2. "Cagayan Riverine Zone Development Framework Plan". National Economic and Development Authority-Regional Development Council Region 2. Retrieved 20 March 2014.


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