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Ekologija / Ecology

ISSN 0235-7224
ISSN 2029-0586 (online)

2007 m. Nr. 2

Changes expected in the hydrological regime of the Dovine river after removal of sluice-gates
Arvydas POVILAITIS, Erik QUERNER

Lake Žuvintas located in southern Lithuania in the basin of the Dovinė river, is one of the biggest lakes and oldest nature reserves of the country. However, changes in the hydrology of the Dovinė river basin, caused by a large-scale melioration and water management works carried out in the 20th century, have resulted in a significant decrease of the biodiversity of Lake Žuvintas and the surrounding wetlands. To prevent the ongoing deterioration of Lake Žuvintas and adjacent wetlands, solutions have to be found at the basin level. Therefore, two scenarios to evaluate the impact of the removal of sluice-gates built on the Dovinė and Amalvė rivers have been analysed to get an insight into the impact of water regime changes in the Žuvintas, Simnas, Dusia and Amalvas lakes and adjacent wetlands. For such scenarios, the method of mathematical modeling employing the SIMGRO model was used.

The results have shown that the entire restoration of water dynamics and flow pattern of the Dovinė river to its original state is impossible. The Dovinė river has been modified to such a degree that the changes are hardly reversible. When striving for at least partial flow naturalization, reconstruction of the existing sluice-gates is necessary.

Keywords: the Dovinė river, Lake Žuvintas, SIMGRO model, hydrological regime, wetlands

Issues:

2011 - Vol.57
No. 1, No. 2

2010 - Vol.56
No. 1-2, No. 3-4

2009 - Vol.55
No. 1, No. 2, No. 3-4

2008 - Vol.54
No. 1, No. 2, No. 3, No. 4

2007 - Vol.53
No. 1, No. 2, No. 2.priedas, No. 3, No. 4

2006
No. 1, No. 2, No. 3, No. 4

2005
No. 1, No. 2, No. 3, No. 4

2004
No. 1, No. 2, No. 3, No. 4

2003
No. 1, No. 2, No. 3, No. 4

2002
No. 1, No. 2, No. 3, No. 4

2001
No. 1, No. 2, No. 3, No. 4