Hydrodynamical Aspects of the Eutrophication Modelling in the Case of Lake Balaton

Since April 1978 a collaborative study has been underway between IIASA and the Coordination Council for the Environmental Research on Lake Balaton of the Hungarian Academy of Sciences. This study is aimed at the development and investigation of the threat of the lake's increasing eutrophication. Principal elements of the study are the identification of the dominant nutrient sources, the investigation of the dominant modes of nutrient transport from the watershed to the lake, and the study of the effects of the nutrient inputs on the water quality of the lakes with the help of water quality models. This collaborative paper deals with the modeling of water movement as part of the water quality modeling element of the project. The paper summarizes the special hydrodynamical features of the lake, analyzes the relevance in connection with eutrophication and sets out scenarios for further work on those hydrodynamical aspects that are important for a better understanding of the lake's quality development. The work reported in this paper was prepared by the author during a short stay at IIASA. It is recognized that it constitutes only the first step in a continuing effort. We would therefore appreciate any comments, remarks, or suggestions by our readers that could help to better shape future activities in this field