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Griuznis
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lake
9
|
name |
Gruzna
Source: R.Avotina, Names of Waterbodies Latvian SSR Date: 01-01-1984 |
|
name |
Velnamarka
Source: R.Avotina, Names of Waterbodies Latvian SSR Date: 01-01-1984 |
|
administrative territory (parish or town) |
Lazdukalna
Source: Date: 01-01-1993 |
|
district (till 01.07.2009) |
Balvu
Source: Date: 01-01-1993 |
|
country |
Latvia
Source: Date: 01-01-1993 |
|
area of water surface |
12.5 hectare
Source: LEA Date: 01-01-1990 |
|
mean depth |
3.1 metre(s)
Source: SMPI Date: 01-01-1974 |
|
maximum depth |
7.0 metre(s)
Source: SMPI Date: 01-01-1974 |
|
hydrological map Grūžņa ezera dziļumu karte |
hydrological map: SMPI Date: 01-01-1975 |
lake bottom
1
|
bottom structure |
mud
Source: SMPI Date: 01-01-1974 |
lakeshore
1
|
slope angle of lakeshore |
low
Source: SMPI Location: around Date: 01-01-1974 |
catchment area
2
|
hydrological regime |
without outflow
Source: SMPI Date: 01-01-1974 |
|
catchment region |
Daugava
Source: LEA Date: 09-01-1998 |
chemistry
2
|
colour of water |
dark brown
Source: Nature Census Project Date: 10-08-2019 |
|
colour of water |
polyhumic
Source: Nature Census Project Date: 10-08-2019 |
fish
4
|
fish of natural occurrence |
crucian carp
Source: SMPI Location: lake Date: 01-01-1974 |
|
fish of natural occurrence |
perch
Source: SMPI Location: lake Date: 01-01-1974 |
|
fish of natural occurrence |
pike
Source: SMPI Location: lake Date: 01-01-1974 |
|
fish of natural occurrence |
roach
Source: SMPI Location: lake Date: 01-01-1974 |
key dangers
2
|
water bloom |
not established
Source: Nature Census Project Location: lake Date: 10-08-2019 |
|
impact |
beaver deed
Source: Nature Census Project Date: 10-08-2019 |
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