Iwahig River

The Iwahig River, also known as Balsahan River, is a watershed located in the Iwahig Penal Colony in Palawan, Philippines.^[1] It has an elevation of 8 metres (26 ft) with an approximate length of 4.14 kilometres (2.57 mi)^[2] The river basin is a 22,859-hectare (56,490-acre) watershed encompassing the city of Puerto Princesa in Palawan province.^[2]

Iwahig River Balsahan River
Iwahig River Operational Map 1st Edition - NARA
Location
Country	Philippines
Region	Palawan
Physical characteristics
Source
• coordinates	9°08′58.993116″N 118°4′52.014720″E / 9.14972031000°N 118.08111520000°E / 9.14972031000; 118.08111520000
• elevation	8 metres (26 ft)
Length	4.14 kilometres (2.57 mi)
Basin size	22,859 ha (228.59 km^2)

Topography

The basin area has a gentle a slope to steep slopes with an elevation range of 10 metres (33 ft) to more than 300 metres (980 ft) above sea level.^[2] Soil types includes Guimbalaon clay, Taburos clay and Bay clay loam. The basin's large area are unclassified with its mountainous land with a closed canopy of trees that covers almost the entire basin.^[3]

Flooding

The towns of Iwahig ang Montible were found susceptible to flooding by the study conducted by the Mines and Geosciences Bureau.^[2]

References

1. Dangan-Galon, Floredel; Dolorosa, Roger. "Species richness of bivalves and gastropods in Iwahig River-Estuary, Palawan, the Philippines". Retrieved 4 December 2021. {{cite journal}}: Cite journal requires |journal= (help)
2. "LiDAR-Surveys-and-Flood-Mapping-of-Iwahig-Penal-Rive" (PDF). University of the Philippines Training Center for Applied Geodesy and Photogrammetry. Retrieved 4 December 2021.
3. "The Master Plan Study of Power Development In Palawan Province Republic of the Philippines" (PDF). Retrieved 4 December 2021. {{cite journal}}: Cite journal requires |journal= (help)