ANALYSIS AND ASSESSMENT OF TECHNOLOGICAL PROCESSES

OF THE MIEDWIE LAKE SURFACE WATER TREATMENT PLANT

FOR THE CITY OF SZCZECIN

 

Jerzy Wira, Daniela Wira

 

Department of Water Environment Engineering, Technical University of Szczecin.

Aleja Piastów 50, 70-311 Szczecin, Poland

 

 

Abstract

 

Miedwie Lake is the biggest post-glacial lake of the West-Pomeranian Voievodship. At the same time it is the fifth of the largest lakes in Poland. As regards the geographical situation, Miedwie Lake is si­tua­ted cen­trally between three big agglomerations i.e. Szczecin, Stargard Szczeciński and Pyrzyce (Fig. 1). The lake lies on the territory of three municipalities: Pyrzyce and Warnice in the District of Pyrzyce as well as Stargard Szczeciński in the District of Stargard (Rozmiarek 1983, Szyper 1990).

At the moment, the reservoir is characterised with the regular, prolonged shape resembling an ellipse. Banks are shallow, regular and sometime very wet. The lake has the belt of the nearshore
reaching locally tens metres far from the lake bank, what is the reason, together with the fact that the wind blows always here, that it is convenient for practising the various kinds of water sports. The lake area amounts to 3527 ha; maximal depth – 43.8 m; average depth – 19.3 m; water ca­pa­ci­ty – 681.7 mln m3; shore-line length – 38.8 km; water level datum 14.1 m above sea level; maxi­mal width 3.16 km; maximal length 16.2 km.

The lake’s bottom is the lowest situated area on the territory of  Poland.

 

Key words: Miedwie Lake, lake’s tributaries, protection zones