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Višķu ezers
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lake
12
islands
2
number of islands |
1 number
Source: Encyclop.Latv.Nature Date: 01-01-1998 |
photograph Saliņa ezers DR daļā. |
photograph: Vita Licite Location: south-west Date: 19-09-2004 |
lake bottom
3
bottom structure |
mud
Source: LEA Date: 01-01-1972 |
bottom structure |
pebbles
Source: LEA Date: 01-01-1972 |
bottom structure |
sand
Source: LEA Date: 01-01-1972 |
lakeshore
9
surroundings
5
catchment area
5
hydrological regime |
flow-through
Source: LEA |
catchment region |
Daugava
Source: LEA Date: 09-01-1998 |
count of discharged rivers |
1 number
Source: LEA |
count of discharged moat |
17 number
Source: LEA |
name of discharged river |
Dubna
Source: LEA |
remarkable objects
2
object |
hillfort
Source: R.Avotina, Names of Waterbodies Latvian SSR Location: north-east Date: 01-01-1996 |
object |
hillfort
Source: R.Avotina, Names of Waterbodies Latvian SSR Location: south Date: 01-01-1996 |
recreation
6
chemistry
2
colour of water |
greenish
Source: Nature Census Project Date: 31-07-2018 |
colour of water |
oligohumic
Source: Nature Census Project Date: 31-07-2018 |
macrophytes
2
photograph Meldri. |
photograph: Janis Spruds Location: north Date: 30-07-2004 |
photograph Šaurlapu vilkvālītes piekrastē pie bij. pirts pamatiem. |
photograph: Vita Licite Location: north Date: 30-07-2004 |
fish
13
fish of natural occurrence |
eel-pout
Source: comments Location: lake Date: 14-12-2006 |
fish of natural occurrence |
roach
Source: www.zive.lv Location: lake Date: 04-07-2005 |
fish of natural occurrence |
white bream
Source: www.zive.lv Location: lake Date: 04-04-2005 |
fish of natural occurrence |
tench
Source: Catch statistics Location: lake Date: 01-01-2001 |
fish of natural occurrence |
bream
Source: SMPI Location: lake Date: 01-01-1973 |
fish of natural occurrence |
eel
Source: SMPI Location: lake Date: 01-01-1973 |
fish of natural occurrence |
perch
Source: SMPI Location: lake Date: 01-01-1973 |
fish of natural occurrence |
pike
Source: SMPI Location: lake Date: 01-01-1973 |
fish of natural occurrence |
zander
Source: SMPI Location: lake Date: 01-01-1973 |
afforcing of fish stock |
pike
Source: National Board of Fisheries Location: lake Date: 01-01-2005 |
afforcing of fish stock |
crucian carp
Source: National Board of Fisheries Location: lake Date: 01-01-2003 |
afforcing of fish stock |
tench
Source: National Board of Fisheries Location: lake Date: 01-01-2003 |
afforcing of fish stock |
zander
Source: National Board of Fisheries Location: lake Date: 01-01-2001 |
phytoplankton
1
photograph Z piekrastē uz grunts zaļaļģu pavedieni. |
photograph: Vita Licite Location: north Date: 30-07-2004 |
key dangers
3
water bloom |
scarce
Source: Nature Census Project Location: lake Date: 31-07-2018 |
waste water inlet |
waste water without treatment
Source: SMPI Date: 01-01-1973 |
waste water inlet (bioloģiski attīrītie) |
70 m3 per day
Source: www.vidm.gov.lv Date: 02-08-2005 |
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