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Viru-Peipsi veemajanduskava - Keskkonnaministeerium

Viru-Peipsi veemajanduskava - Keskkonnaministeerium

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4.4 Põhjavee seisundi hinnang 4.4 Status of groundwater bodies<br />

Tänase seisuga pole ükski jääkreostuskolle üksikult<br />

niivõrd suur, et oleks põhjustanud kogu põhjaveekogumi<br />

seisundi halvenemist. Ohtlik on reostuskollete<br />

kontsentreerumine, seda eriti Ida-<strong>Viru</strong> põlevkivibasseini<br />

Ordoviitsiumi põhjaveekogumi puhul,<br />

sest kaevanduste veekõrvaldusega tekitatud<br />

tehislik intensiivne veevahetus soodustab reostuse<br />

levikut. Jääkreostuskollete kohta on koostatud andmebaas<br />

ning olulisemad jääkreostuskolded kuuluvad<br />

riikliku tähtsusega jääkreostusobjektide nimekirja.<br />

Residual pollution<br />

The impact of residual pollution is expressed<br />

mostly in the immediate vicinity of pollution<br />

sources – in areas with vulnerable groundwater<br />

at the distance of up to 1 km and in areas with<br />

clayey soils – 200–300 m from the pollution<br />

source. The biggest residual pollution sites affecting<br />

the status of groundwater bodies are as follows<br />

(Table 4.4).<br />

As of today, none of these pollution sites is significant<br />

enough to cause deterioration of the status<br />

of an entire groundwater body. Concentration<br />

of pollution sites poses a danger, especially to<br />

the Ordovician groundwater body of Ida-<strong>Viru</strong> oil<br />

shale basin, because intensive human-induced<br />

water exchange caused by removal of mine water<br />

facilitates the spreading of pollution. A database<br />

of residual pollution sources has been compiled<br />

and the most important sites are listed as residual<br />

pollution sites of national importance.<br />

4.4 Põhjavee seisundi hinnang<br />

<strong>Viru</strong>-<strong>Peipsi</strong> <strong>veemajanduskava</strong> territooriumile jäävad<br />

põhjaveekogumid on kõik peale Ida-<strong>Viru</strong> põlevkivibasseini<br />

Ordoviitsiumi põhjaveekogumi<br />

heas kvalitatiivses ja kvantitatiivses seisundis. Ida-<br />

<strong>Viru</strong> põlevkivibasseini Ordoviitsiumi põhjaveekogumi<br />

hea seisundi saavutamine ei ole lähema<br />

paarikümne aasta jooksul võimalik.<br />

4.4 Status of groundwater bodies<br />

All groundwater bodies falling within the territory<br />

of the <strong>Viru</strong>-<strong>Peipsi</strong> Water Management Plan are in<br />

a good qualitative and quantitative status, except<br />

the Ordovician groundwater body of Ida-<strong>Viru</strong> oil<br />

shale basin. Achievement of a good status of the<br />

latter groundwater body is not possible in the<br />

next few decades.<br />

Table 4.4. Substantial residual pollution sites<br />

Residual pollution site Groundwater body affected Pollution indicators<br />

Raadi airport Quaternary Meltsiveski Samine pollution eliminated,<br />

groundwater body<br />

oil pollution reduced, raised<br />

concentrations of chromium<br />

and tetrachloromethane found<br />

in wells.<br />

Waste depositories of oil Ordovician Ida-<strong>Viru</strong> and Oil products, phenols,<br />

shale chemical industry in Ordovician-Cambrian benzene<br />

Kiviõli and Kohtla-Järve<br />

groundwater bodies<br />

Ash hills of power plants, Ordovician Ida-<strong>Viru</strong> and Sulphates, chlorine,<br />

sedimentation tanks, landfills Ordovician-Cambrian potassium, dangerous<br />

groundwater bodies<br />

substances

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