Panketo Pond

About Panketo Pond

The largest lake in the Sarobetsu Plain, a brackish lake about 8 km around, colored reddish by iron from the surrounding peat. Together with Penketo Pond it regularly supports more than 1% of the East Asian populations of taiga bean geese and tundra swans, and it was designated a Ramsar Site (Sarobetsu Plain) in 2005. It was an unmodified lake in the 1991 survey.

Sources: Ministry of the Environment, Rishiri-Rebun-Sarobetsu National Park, Ministry of the Environment, Ramsar Site leaflet: Sarobetsu-genya, Environment Agency of Japan, Lake Survey Report (1993) (sources in Japanese)

Lake data

Area

3.55 km²#23 in Hokkaido

Maximum depth

2.4 m#67 in Hokkaido

Average depth

1 m

Surface elevation

0 m

Transparency

2 m#21 in Hokkaidoas of the 1991 survey

Origin

Lagoon-origin lake

Lake type

Dystrophic

Fresh or brackish

Brackish

Freezing

Freezes in winter

Unmodified lake

Yes (shore entirely natural)

Natural park

Rishiri-Rebun-Sarobetsu National Park

Ramsar Convention

Ramsar Site

Lake number

0840number in the national lake survey

Sources: Geospatial Information Authority of Japan, Area Statistics of Prefectures and Municipalities 2026 (as of July 1), Geospatial Information Authority of Japan, Lake Survey (surveyed 2005), Environment Agency of Japan, 4th National Survey on the Natural Environment: Lake Survey Report (1993). Area and depth use newer figures from the Geospatial Information Authority of Japan where available. Origin, lake type, transparency, freezing and unmodified status are as of the 1991 survey.

Themes that include Panketo Pond

• Lagoon-origin lakes
• Dystrophic lakes
• Brackish lakes
• Unmodified lakes