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Osvas ezers
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lake
12
|
name |
Osvas
Source: R.Avotina, Names of Waterbodies Latvian SSR Date: 01-01-1984 |
|
name |
Asvas
Source: R.Avotina, Names of Waterbodies Latvian SSR Date: 01-01-1984 |
|
administrative territory (parish or town) |
Berzinu
Source: Date: 01-01-1993 |
|
district (till 01.07.2009) |
Kraslavas
Source: Date: 01-01-1993 |
|
country |
Latvia
Source: Date: 01-01-1993 |
|
status "de jure" |
public
Source: the Latvian Parliament Location: lake Date: 10-06-1998 |
|
area of water surface |
51.8 hectare
Source: the Latvian Parliament Date: 10-06-1998 |
|
area of water surface |
51.8 hectare
Source: Encyclop.Latv.Nature Date: 01-01-1997 |
|
mean depth |
4.0 metre(s)
Source: LEA Date: 01-01-1972 |
|
maximum depth |
8.9 metre(s)
Source: SMPI Date: 01-01-1972 |
|
hydrological map Osvas ezera dziļumu karte |
hydrological map: SMPI Date: 01-01-1975 |
|
photograph Skats no R krasta. |
photograph: Vita Licite Location: west Date: 31-07-2004 |
lake bottom
3
|
bottom structure |
gravel
Source: SMPI Location: in places Date: 01-01-1972 |
|
bottom structure |
sand
Source: SMPI Location: in places Date: 01-01-1972 |
|
bottom structure |
mud
Source: SMPI Date: 01-01-1972 |
lakeshore
10
|
slope angle of lakeshore |
steep
Source: SMPI Location: west Date: 01-01-1972 |
|
slope angle of lakeshore |
dip
Source: SMPI Location: north Date: 01-01-1972 |
|
slope angle of lakeshore |
dip
Source: LEA Location: south |
|
slope angle of lakeshore |
dip
Source: LEA Location: west |
|
slope angle of lakeshore |
gentle
Source: LEA Location: north |
|
slope angle of lakeshore |
gentle
Source: LEA Location: east |
|
photograph D krasts (3). |
photograph: Janis Spruds Location: south Date: 31-07-2004 |
|
photograph D krasts (2). |
photograph: Janis Spruds Location: south Date: 31-07-2004 |
|
photograph D krasts. |
photograph: Janis Spruds Location: south Date: 31-07-2004 |
|
photograph Aizaugusi, dūņaina R piekraste. |
photograph: Vita Licite Location: west Date: 31-07-2004 |
surroundings
2
|
inhabitation |
farm-stead
Source: "Latvijas ezeri" Date: 01-01-2011 |
|
photograph Ezera apkārtne - Z krasts. |
photograph: Janis Spruds Location: north Date: 31-07-2004 |
catchment area
3
|
hydrological regime |
with outflow
Source: SMPI Location: lake Date: 01-01-1972 |
|
catchment region |
Daugava
Source: LEA Date: 09-01-1998 |
|
count of discharged stream |
1 number
Source: LEA |
chemistry
3
|
colour of water |
oligohumic
Source: Nature Census Project Date: 24-08-2019 |
|
colour of water |
yellowish
Source: Nature Census Project Date: 24-08-2019 |
|
colour of water |
oligohumic
Source: SMPI Location: lake Date: 12-07-1972 |
macrophytes
4
|
photograph Dzeltenās lēpes ezera piekrastē. |
photograph: Janis Spruds Date: 31-07-2004 |
|
photograph Niedres, dzeltenās lēpes. |
photograph: Janis Spruds Date: 31-07-2004 |
|
photograph Niedres, dzeltenās lēpes, peldošās glīvenes, retas kosas. |
photograph: Janis Spruds Location: north-west Date: 31-07-2004 |
|
photograph Raksturīga plata virsūdens un peldlapu augu josla - niedres un dzeltenās lēpes. |
photograph: Janis Spruds Location: north-west Date: 31-07-2004 |
fish
9
|
fish of natural occurrence |
tench
Source: comments Location: lake Date: 18-12-2005 |
|
fish of natural occurrence |
rudd
Source: "Latvijas ezeri" Location: lake Date: 31-07-2004 |
|
fish of natural occurrence |
crucian carp
Source: Catch statistics Location: lake Date: 01-01-2001 |
|
fish of natural occurrence |
ruffe
Source: SMPI Location: lake Date: 01-01-1972 |
|
fish of natural occurrence |
bream
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 |
roach
Source: SMPI Location: lake Date: 01-01-1972 |
|
fish of natural occurrence |
perch
Source: SMPI Location: lake Date: 01-01-1972 |
|
crayfish |
established
Source: comments Location: lake Date: 18-12-2005 |
key dangers
2
|
water bloom |
not established
Source: Nature Census Project Location: lake Date: 24-08-2019 |
|
impact |
beaver deed
Source: Nature Census Project Date: 24-08-2019 |
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