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Register
| Parameter | Value | Source | Date |
|---|
|
name |
Istalsnas |
R.Avotina, Names of Waterbodies Latvian SSR |
01-01-1984 |
|
Municipality (2026) |
Ludzas novads |
the Latvian Parliament |
01-07-2021 |
|
administrative territory (parish or town) |
Isnaudas |
|
01-01-1993 |
|
district (till 01.07.2009) |
Ludzas |
|
01-01-1993 |
|
country |
Latvia |
|
01-01-1993 |
|
area of water surface |
56.7 hectare |
LEA |
01-01-1972 |
|
mean depth |
0.3 metre(s) |
LEA |
01-01-1972 |
|
maximum depth |
0.4 metre(s) |
LEA |
01-01-1972 |
| Parameter | Value | Source | Date |
|---|
|
number of islands |
1 number |
Encyclop.Latv.Nature |
01-01-1995 |
| Parameter | Value | Source | Date |
|---|
|
bottom structure |
mud |
SMPI |
01-01-1973 |
| Parameter | Value | Source | Date |
|---|
|
slope angle of lakeshore Location: east |
gentle |
SMPI |
01-01-1973 |
|
slope angle of lakeshore Location: east |
dip |
SMPI |
01-01-1973 |
|
slope angle of lakeshore Location: north |
gentle |
SMPI |
01-01-1973 |
|
slope angle of lakeshore Location: north |
dip |
SMPI |
01-01-1973 |
|
slope angle of lakeshore Location: prevailing |
low |
LEA |
|
| Parameter | Value | Source | Date |
|---|
|
inhabitation Location: north |
inhabited locality |
SMPI |
01-01-1973 |
| Parameter | Value | Source | Date |
|---|
|
hydrological regime |
flow-through |
LEA |
|
|
catchment region |
68 (basin of the Velikaya River) |
LEA |
09-01-1998 |
|
count of discharged stream |
1 number |
SMPI |
01-01-1973 |
|
count of discharged moat |
7 number |
SMPI |
01-01-1973 |
|
name of discharged river |
Istalsna |
LEA |
|
| Parameter | Value | Source | Date |
|---|
|
colour of water |
colorless |
Nature Census Project |
30-07-2018 |
|
colour of water |
oligohumic |
Nature Census Project |
30-07-2018 |
| Parameter | Value | Source | Date |
|---|
|
fish of natural occurrence Location: lake |
bream |
comments |
25-09-2024 |
|
fish of natural occurrence Location: lake |
crucian carp |
comments |
25-09-2024 |
|
fish of natural occurrence Location: lake |
rudd |
comments |
25-09-2024 |
|
fish of natural occurrence Location: lake |
ruffe |
SMPI |
01-01-1973 |
|
fish of natural occurrence Location: lake |
perch |
SMPI |
01-01-1973 |
|
fish of natural occurrence Location: lake |
roach |
SMPI |
01-01-1973 |
|
fish of natural occurrence Location: lake |
pike |
SMPI |
01-01-1973 |
|
fish of natural occurrence Location: lake |
tench |
SMPI |
01-01-1973 |
| Parameter | Value | Source | Date |
|---|
|
water bloom Location: lake |
occured |
Nature Census Project |
30-07-2018 |