NH₄-N
19920.33 mg/dm³
Surface layer
51.5708, 23.9167karst lake
Lake Pisochne
Пісочне
- 16.2 m
- Maximum depth
- ≈6.9 m
- Average depth
- ≈1.89 km²
- Surface area
- 14.55 million m³
- Water volume
Verified dataset
Key facts
Pisochne is a deep karst lake of the Shatsk district with clear, weakly mineralised water. Historical studies of the surface layer record 5.8–9.5 mg/dm³ of dissolved oxygen, and from roughly 10 m down they describe temperature and oxygen falling together.
Status: Shatsk National Nature Park; the second most visited lake after Svitiaz
- Area
- ≈1.89 km²
- Maximum depth
- 16.2 m
- Average depth
- ≈6.9 m
- Shoreline
- 5.6 km
Water chemistry
calcium bicarbonate
- pH
- ≈7.9
- Total dissolved solids
- ≈115 mg/L
- Transparency
- 5 m
- Dissolved oxygen O₂
- 5.8–9.5 mg/dm³
- Trophic state
- mesotrophic (weakly mesotrophic)
Ionic composition, mg/dm³
HCO₃⁻61
Ca²⁺20
Na⁺+K⁺11
Cl⁻11
SO₄²⁻9
Mg²⁺3
Mean concentrations from the 2020 review table; the source does not state the averaging period.
Field and laboratory measurements
Year and method matter: these values are not constantNO₂-N
19920.003 mg/dm³
NO₃-N
19920.02 mg/dm³
PO₄-P
19920.01 mg/dm³
Total nitrogen
1996–19970.41 mg/dm³
Total phosphorus
1996–19970.028 mg/dm³
BOD₅
2005–20091.67–3.18 mg O₂/dm³
Thermal stratification
surfaceabout 10 mdeeper water
Confirmed threshold
≈ 10 m
Below the threshold
The source records water temperature and dissolved oxygen falling together.
Exact layer boundaries and a numerical vertical profile are unpublished, so the diagram does not divide the water column into epi-, meta- and hypolimnion.
Temperature and oxygen stratification is described for Pisochne: from about 10 m down, water temperature and dissolved oxygen both fall. The available source gives no numerical vertical profile and no exact layer boundaries.
Ichthyofauna
Fish of the lake
Native species
Introduced / acclimatised
Invasive species
Ecosystem
Flora and birds
Red Book flora
white water lily
Birds
mallardmute swangull
What to know
Lake in detail
- One of the deepest and cleanest lakes of the group; a twin-oval basin of two cone-shaped hollows that warms up well.
- The “Lisova Pisnia” sanatorium stands on the shore — about 400 beds, mainly cardiological — named after Lesia Ukrainka's play and operating under that name since 1971.
- The lake lies on the “Lisova Pisnia” tourist route, which links Pisochne and Peremut.
- The biological and geographical field station of Ivan Franko National University of Lviv stands on the shore.
- Shores and bed are entirely sandy, with a gentle, safe slope for children.
- Largemouth bass were released into the Shatsk group in the early 1950s and in the second half of that decade occurred mainly in Pisochne; the current size of the population is not established in open data.
- In 2021 ten brown bullheads, Ameiurus nebulosus, measuring 109–199 mm were sampled directly in Pisochne — present-day confirmation of the invasive species.
History
Chronology
- Початок 1950-х
Under the fish acclimatisation programme, largemouth bass began to be released into the Shatsk group; in the second half of the 1950s it appeared in catches mainly in Pisochne.
- 1967
The 240-bed “Sribnyi Bereh” holiday home on the shore of Pisochne received its first guests.
- 1971
“Sribnyi Bereh” was renamed the “Lisova Pisnia” sanatorium, and a treatment and rehabilitation base was later built up here.
- 1983
Shatsk National Nature Park is created, and the lake has been protected within it ever since.
- 1989–2013
In a series of fisheries studies the brown bullhead was considered practically absent from Pisochne — an important baseline for judging its later return or growing visibility.
- 2021
Ten brown bullheads, Ameiurus nebulosus, were sampled directly in the lake for a parasitological study — present-day confirmation of the invasive species.
State and recreation
The lake today
Recreation
Beaches: sandy beaches with clear water
Recreational fishing from bank and boat under the rules of Shatsk National Nature Park.
Ecological pressures
Recreational pressure
The sanatorium, holiday bases and campsites create a peak summer load of several thousand visitors at once.
several thousand people at peak season
Rank in the group
#6by area · of 30
#3by depth · of 27
#10by mineralisation · of 10
Area against Svitiaz, the largest lake≈1.89 of 26.2 km²
Each measure counts only the lakes that report it.
Geography and access
Places nearby
All places →village
Melnyky
Melnyky is a village beside Lake Pisochne and a key base in the eastern part of the Shatsk lake district. It connects routes to Pisochne, Krymne, Moshne and several smaller lakes.
Open profile →village
Pulmo
Pulmo is a village between Lakes Svitiaz and Pulemetske and an important gateway to the western part of the Shatsk lake district. Routes from here reach both large lakes and several smaller waters.
Open profile →Language note
Editorial scope
This English profile carries the full narrative, chronology and local traditions. Source titles stay in their original language, and the Ukrainian page remains the reference version.
Read the Ukrainian profile →Sources
Source titles are retained in their original language.
- Гідрохімічні дослідження озерних екосистем Шацького НПП: оз. Пісочне [Hydrochemical studies of the lake ecosystems of Shatsk National Nature Park: Lake Pisochne] (2009)
- Основні аспекти морфометрії та гідрохімії Шацьких озер [Key aspects of the morphometry and hydrochemistry of the Shatsk lakes] (2020)
- Пісочне озеро [Lake Pisochne] (2023)
- о. Пісочне [Lake Pisochne]
- Акліматизація форелеокуня Micropterus salmoides в озерах Шацької групи: історія та сучасні питання [Acclimatisation of largemouth bass Micropterus salmoides in the lakes of the Shatsk group: history and current questions] (2019)
- First data on parasites of the invasive brown bullhead Ameiurus nebulosus in Ukraine (2023)
- Пісочне озеро (Шацький район) [Lake Pisochne (Shatsk district)]
- Санаторій «Лісова Пісня» [The “Lisova Pisnia” sanatorium] (2024)
- Шацькі озера — ВУЕ [Shatsk lakes — Great Ukrainian Encyclopedia]
Photo: Ds malwaCC BY-SA 4.0cropped