Pekerettonuma Pond

About Pekerettonuma Pond

A pond near the Ishikari River in Kita Ward, Sapporo, described in the survey's data appendix as an oxbow lake left behind when the river changed course. Its transparency in 1991 was only 0.1 m, and it was eutrophic (nutrient-rich). Recorded species include loach, sticklebacks, crucian carp, carp and Japanese smelt, and mallards and smew in winter. In the 1976 aerial photo the pond was surrounded by fields.

Sources: Environment Agency of Japan, Lake Survey Report (1993), Environment Agency of Japan, Lake Survey Report: Data Appendix (1993), This site: comparison of 1970s GSI aerial photos with recent GSI imagery (sources in Japanese)

Lake data

Area

0.12 km²#75 in Hokkaido

Maximum depth

1.2 m#89 in Hokkaido

Average depth

0.8 m

Surface elevation

2 m

Transparency

0.1 m#63 in Hokkaidoas of the 1991 survey

Origin

Other

Lake type

Eutrophic

Fresh or brackish

Freshwater

Freezing

Freezes in winter

Unmodified lake

No

Natural park

None

Lake number

0930number in the national lake survey

Sources: 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 Pekerettonuma Pond

• Eutrophic lakes
• Freshwater lakes