Cities of Tallinn and Pärnu

Description of case study area:

1.Tallinn case study area

Tallinn is the Capital of Estonia with population more than 400 000 and area 158 km2. Coast line length of the city is 70 km.

Ülemiste Lake (water volume 0.34 km3) is the main source of drinking water for Tallinn (water consuming from the lake is more than 1 m3/sec). The lake is feeding from Pirita River catchment system with the area more than 1000 km2. Lake Ülemiste is located at 20-30 m higher than the most part of Tallinn. The barrier between the lake and downtown consists of friable sediments (sand, silt, gravel). During long raining periods the water level rises essentially.
Risk factor: Possible overflow and flooding the downtown; possible pollution of water reservoir from flooded areas. Water table of Harku Lake is only 1.2 m a.s.l. The lake is located in the immediate neighborhood of Õismäe habitation area.
Risk factor: Strong and long precipitation and sea level rise may cause floods. Tallinn downtown is influenced by changing climate and sea level rise.
Main risk factor: Strong storms and floods in the coastal zone.

2. Pärnu case study area

Pärnu River catchment area is 6900 km2, mean river discharge is 64 m3/s. Increased risks as a result of combining meteorological and geological factors.
Meteorological factors caused by climate changes:

Geological factors:

Overview map and photos of the case study area:

Location of the case studies in Estonia

Floods and coastal erosion in Pärnu case area.

Floods in Harku Lake and in Tallinn downtown.

Planned work and results in the case study area:

Main questions to be solved in the course of the ASTRA Project:

Description of project partner:

Geological Survey of Estonia/ Eesti Geoloogiakeskus (EGK)

The Geological Survey of Estonia is a government-owned enterprise belonging to the Ministry of Environment. The number of employees is 95 persons including 5 PhDs, 11 MScs, 46 engineers and 22 technicians. Main fields of activity of the Geological Survey of Estonia (EGK) are the following:

Since the year 2003 EGK is a member of EuroGeoSurveys. EGK has joined the ASTRA project because research of environmental problems in connection with geology is one of the main aims of the institution.


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