MICROBIOLOGICAL STUDY OF BALTIC SEA AND GULF OF RIGA COAST BATHING WATERS

Astrīda Zandmane

Abstract


This report focuses on the studies o f the bathing water microbiological quality in Latvian coastal zone of the Baltic sea and the Gulf of Riga in May-October, 1998-1999. The microbiological studies has been done in the different coastal zones of Kurzeme and Vidzeme, downstreams o f small rivers and biggest rivers Venta and Gauja, discharges o f wastewater treatment plants and the public bathing waters in Ventspils and Saulkrasti municipality area to assess their quality according to the EU Blue Flag and Latvian National Standard criteria. The microbiological examinations were carried out in accordance with the International Standard Methods. A complex of indicatororganisms - total and thermotholerant coliforms (E.coli), streptococci, and heterotrophicplate count (37°,21°C) has been tested. Water quality in the Kurzeme has been found much better on the beaches of the Baltic sea than the most urbanised beaches of Gulf o f Riga. The quality o f the Ventspils public bathing waters has been evaluated as very good (80-100% o f data). Whereas as a result of anthropogenic load only 61-82% o f data conforms the obligatory requirements of the bathing water quality in Saulkrasti coastal zone. In the study the microbiological pollution, sources and levels of their dynamics and hydrological factors are interpreted. The colour maps o f the bathing waters quality are presented.

Full Text:

PDF

References


Latvijas Tūrisma attīstības aģentūras nolikums, LR MK Noteikumi Nr.57, 1999.

Zilie Karogi. Rokasgrāmata. Latvijas pašvaldību iesaistīšanai Eiropas Savienības neformālajā peldūdeņu vērtēšanas kustībā, Rīga, 1997, 51.

Municipālo piesārņojuma avotu ietekmes novērtēšana uz Baltijas jūras piekrastes ūdeņu kvalitāti. Līgumdarba atskaite. LU Hidroekoloģijas institūts, 1996.

Piekrastes zonas monitoringa izveide Latvijas ūdeņos. Līgumdarba atskaite. LU Hidroekoloģijas institūts, 1998.

Kurzemes piekrastes peldūdens mikrobioloģiskās kvalitātes izpēte un novērtējums. Projekta atskaite, VARAM Vides datu centrs, Jūrmala, 1999, 92, A,B,C,D.

Saulkrastu rajona upju un Rīgas līča piekrastes vides stāvokļa novērtējums. Līgumdarba atskaite. LU Hidroekoloģijas institūts, Rīga, 1999,124.

Standard Methods for the examination of waters and wastewaters.Ed. by A.D.Eaton, L.S.Clesceri, A.E.Greenberg, 19th ed., 1995, part 9000.

Environment-Water quality-Physical, biological and microbiological methods, vol.3,1994, 266.

Peldvietu iekārtošanas un higiēnas noteikumi. LR MK Noteikumi Nr.,300,44,7,1998.

Badevandskort Bathing Water Map/Badewasser-Atlas Ministry of Environment and Energy, Danish DEPA, 1997,88.




DOI: http://dx.doi.org/10.17770/etr2001vol1.1965

Refbacks

  • There are currently no refbacks.