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Lake Balanan is a lake situated in Siaton, Negros Oriental in the Philippines.[2] It is a freshwater lake in the forested mountains of the southern portion of the island of Negros, with a shape resembling a figure of eight, the narrowest point between the two main portions of the lake being only 90 metres (300 ft) wide. The lake is surrounded by mountain ranges, and is fed by three tributaries, all located in the northern end. These are the Lamarao Creek at the northeastern corner with two waterfalls, the Balanan Creek at the middle of the northern end with another waterfall, and the Nasig-id Creek at the northwestern end.

Lake Balanan
Lake Balanan Location within the Philippines
Location	Negros Oriental
Coordinates	9°8′16″N 122°59′55″E
Primary inflows	Lamarao Creek Balanan Creek Nasig-id Creek
Primary outflows	Balanan River
Basin countries	Philippines
Surface area	25 ha (0.25 km2)
Shore length1	3.5 km (2.17 mi)
Surface elevation	237 m (777.56 ft)[1]
Settlements	Siaton
1 Shore length is not a well-defined measure.

The lake has a humid tropical climate with two pronounced seasons, a dry season from November to April and a wet season for the rest of the year.

The lake was formed by a tectonic earthquake with the magnitude of a 6.8 on the Richter scale that hit the southern portion of the island of Negros, and caused landslides in the southern ends of both the Balanan and Nasig-id ranges in Siaton. The fallen rocks and soil dammed the Balanan River that flowed between these mountain ranges forming a 25-hectare (62-acre) "humerus" bone-formed lake oriented along the Northwest-Southeast line.[2][3]

The lake and surrounding forests are currently being managed as a Watershed Area by the Bureau of Forest Development. A proposal has been made to designate the area as a Game Refuge and Wildlife Sanctuary to protect the large population of bats and other wildlife. This proposal was endorsed by the Department of Environment and Natural Resources, Region 7, in January 1987.

History

At 5 pm on May 5, 1925, the town of Siaton was hit by an earthquake that registered 6.8 on the Richter Scale. The quake triggered a landslide that created a natural dam. The dam, called Sampong (meaning "to close"), blocked the flow of Balanan River, turning it into a lake.[4]

References

External links

• Geographic data related to Lake Balanan at OpenStreetMap

На других языках

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[de] Balanan-See

Der Balanan-See ist ein Binnensee im Süden der Insel Negros auf den Philippinen. Der See liegt unweit der südlichen Küste der Provinz Negros Oriental, ca. 5 km nördlich der Gemeinde Siaton. Sein Abfluss mündet in den Fluss Siaton, der bei Siaton in die Mindanaosee fließt. Aus der Vogelperspektive gesehen hat der See die Form einer Acht, an seiner schmalsten Stelle ist er nur 90 Meter breit. An seinen Ufern liegen ausgedehnte Regenwälder. Die Topographie des umliegenden Geländes wird von den Gebirgszügen Lamaraw und Anupugan dominiert, die bis auf 1.000 Meter über den Meeresspiegel aufsteigen. Im Januar 1987 wurde ein Jagd- und Wildschutzgebiet um den See etabliert.

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- [en] Lake Balanan

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