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Opsas ezers
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lake
9
|
name |
Opsas
Source: R.Avotina, Names of Waterbodies Latvian SSR Date: 01-01-1984 |
|
name |
Orsa
Source: R.Avotina, Names of Waterbodies Latvian SSR Date: 01-01-1984 |
|
administrative territory (parish or town) |
Dagdas
Source: Date: 01-01-1993 |
|
district (till 01.07.2009) |
Kraslavas
Source: Date: 01-01-1993 |
|
country |
Latvia
Source: Date: 01-01-1993 |
|
area of water surface |
16.0 hectare
Source: LEA Date: 01-01-1972 |
|
mean depth |
1.4 metre(s)
Source: LEA Date: 01-01-1972 |
|
maximum depth |
2.7 metre(s)
Source: LEA Date: 01-01-1972 |
|
hydrological map Opsas ezera dziļumu karte |
hydrological map: SMPI Date: 01-01-1975 |
lake bottom
1
|
bottom structure |
mud
Source: SMPI Date: 01-01-1972 |
lakeshore
4
|
slope angle of lakeshore |
gentle
Source: LEA Location: north |
|
slope angle of lakeshore |
gentle
Source: LEA Location: east |
|
slope angle of lakeshore |
low
Source: LEA Location: south |
|
slope angle of lakeshore |
low
Source: LEA Location: west |
surroundings
1
|
inhabitation |
town
Source: SMPI Location: north Date: 01-01-1972 |
catchment area
2
|
hydrological regime |
with outflow
Source: LEA |
|
catchment region |
Daugava
Source: LEA Date: 09-01-1998 |
recreation
1
|
recreation facility |
bathing-place
Source: SMPI Location: north-east Date: 01-01-1972 |
chemistry
4
|
colour of water |
oligohumic
Source: Nature Census Project Date: 02-08-2019 |
|
colour of water |
yellowish
Source: Nature Census Project Date: 02-08-2019 |
|
colour of water |
brownish
Source: Nature Census Project Location: south-west Date: 02-09-2019 |
|
colour of water |
polyhumic
Source: Nature Census Project Location: south-west Date: 02-09-2019 |
fish
4
|
fish of natural occurrence |
roach
Source: SMPI Location: lake Date: 01-01-1972 |
|
fish of natural occurrence |
perch
Source: SMPI Location: lake Date: 01-01-1972 |
|
fish of natural occurrence |
pike
Source: SMPI Location: lake Date: 01-01-1972 |
|
fish of natural occurrence |
crucian carp
Source: SMPI Location: lake Date: 01-01-1972 |
key dangers
4
|
water bloom |
not established
Source: Nature Census Project Location: lake Date: 02-08-2019 |
|
impact |
beaver deed
Source: Nature Census Project Date: 02-08-2019 |
|
water bloom |
not established
Source: Nature Census Project Location: south-west Date: 02-09-2019 |
|
impact |
beaver deed
Source: Nature Census Project Location: south-west Date: 02-09-2019 |
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