Data Summary: Suwa-ko (Lake Suwa)
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| Site Name |
ASI-31 |
Photo : Nagano Prefectural Government |
| Lake Name |
Suwa-ko (Lake Suwa) |
| State |
Nagano Prefecture |
| Country |
Japan |
| Latitude |
36:0N |
| Longitude |
138:1E |
| Altitude [m] |
759 |
| Surface area [m2] |
13,300,000 |
Volume [m3] |
63,000,000 |
| Maximum depth [m] |
7.2 |
Mean depth [m] |
4.7 |
| Water level control |
Regulated |
Normal range of annual water level fluctuation [m] |
- |
| Length of shoreline [m] |
15,900 |
Residence time [yr] |
0.11 |
| Catchment area [m2] |
515,300,000 |
Hours of bright Sunshine [hr yr-1] |
2,246.2 |
| Solar radiation [MJ m-2 day-1] |
14.1 |
Freezing period |
Jan-Feb |
| Mixing type |
Dimictic |
Annual fish catch [t yr-1] |
201 |
| Total N loading [t yr-1] |
815.3735 |
Total P loading [t yr-1] |
111.1425 |
| Population |
180,280 |
Population density of catchment area [person km-2] |
339.4 |
WATER USAGE
| Domestic water usage [m3 sec-1] |
- |
Irigation water usage [m3 sec-1] |
- |
| Industrial water usage [m3 sec-1] |
0.002 |
Power generation usage [m3 sec-1] |
- |
LAND USE
| Natural landscape [%] |
71.9 |
Agricultural land [%] |
12.8 |
Others [%] |
15.2 |
| Siltation |
- |
Toxic Contamination |
None |
| Eutrophication |
Serious |
Acidification |
None |
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