Pyiavochne

Water

Published water indicators

Transparency

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pH

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Total dissolved solids

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Dissolved oxygen

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Trophic state

a mesotrophic lake-and-marsh complex according to the 2024 field survey; the older lake typology called it dystrophic

Ecosystem

Flora and birds

What to know

Lake in detail

• The scientific morphometric table gives an area of about 0.01 km², a shoreline of 0.20 km and a water basin of roughly 100 × 100 m.
• The maximum depth of 2 m comes from Lencewicz's historical table of 1931; the more recent review no longer states a depth, so the figure should not be read as a current sounding.
• The water authority places Piiavochne north of Navrattia and assigns it to the Turskyi canal basin; its table gives a mean depth of 0.5 m and a volume of 5,000 m³.
• The official table is self-contradictory: for a water body of roughly 100 × 100 m it gives a shoreline of 2 km and a maximum depth of 1 m, against 0.2 km and a historical 2 m in the scientific sources; the doubtful values have not been carried over.
• On 27 August 2024 park researchers noted a strong presence of cranberry, marsh helleborine, early marsh-orchid, white beak-sedge and sphagnum mosses.
• Marsh helleborine and early marsh-orchid are vulnerable species in the Red Book of Ukraine.
• The verdict depends on what is being judged: as an open lake the water body has degraded badly, but as a marsh complex it was in satisfactory condition in 2024, with its flora on a positive trend.
• No verified fish list or modern control catch for Piiavochne was found in open sources.

History

Chronology

1. 1931

   The historical morphometric table records an area of about 0.01 km² for Piiavochne, dimensions of 0.12 × 0.08 km and a maximum depth of 2 m.

2. 2017

   A scientific review classed Piiavochne among the dystrophic water bodies that have lost their open natural state through siltation, shoaling and overgrowth.

3. 27 серпня 2024

   The park's research department surveyed the flora of the mesotrophic lake-and-marsh complex and recorded the site in satisfactory condition, with its marsh flora on a positive trend.

State and recreation

The lake today