Ladoga and Onego - Great European Lakes: Observations and Modeling PDF
315 Pages·2009·28.047 MB·English
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Lakes Ladoga and Onego are the greatest lakes in Europe. With a surface area of 17891 km2 and a volume of 902 km3, the former is one of the top fifteen world’s freshwater lakes and is only slightly smaller than Lake Ontario. Lake Onego’s surface area is 9600 km2 and it has a volume of 292 km3. The watershed of Lake Ladoga (258000 km2) extends through Northwestern European Russia and the eastern part of Finland, including the large Lakes Ilmen and Saimaa, and together these Great European Lakes are an important link in the Caspian-Baltic-White Sea waterway system. Their ecological state affects the water quality of the Neva River, the Gulf of Finland and the Baltic Sea. Thus any changes affect the operational use, environmental protection and management of water resources of a wide area and concern such issues as drinking, recreation, transport and energy. The anthropogenic impact on the Lake Onego ecosystem is mostly determined by the sewage waters of the Petrozavodsk and Kondopoga industrial centres, while the river inflow makes the most impact on Lake Ladoga. Although the anthropogenic stress on the water ecosystems of the Great European Lakes has decreased over the last 15 years, there has been some simultaneous evidence of global warming. There is not enough current data to identify the climate-induced changes in lake ecosystems, but there is proof that the main cause of lacustrine ecosystem changes is determined by anthropogenic factors. Coupled thermohydrodynamic and ecosystem models for Lakes Ladoga and Onego have been developed to study the contemporary situation, to understand the main mechanisms of the ecosystem transformation, and to learn what may happen in future under the varying antropogenic impact and climate changes. Lake Ladoga preserves its weak mesotrophic status while Lake Onego can be characterized as oligotrophic. Economic growth during the last seven years has led to the increasing anthropogenic impact on both their ecosystems. The Great European Lakes are attracting the increasing attention of both researchers and end-users. This book is a synthesis of multifaceted interdisciplinary studies conducted by a team of experts in limnology, geography, biology, mathematical modeling and economy. The editors, Professors Rukhovets and Filatov, are the authors of numerous articles and books and are recognized as the foremost experts in their fields. Professor Rukhovets has been Director of the Institute of Economy and Mathematics in Saint-Petersburg and head of the laboratory of mathematical modeling since 1998 while Professor Filatov is currently Director of the Northern Water Problems Institute in Petrozavodsk, Russia.
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