One of the principal projects of the Task on Environmental Quality Control and Management in IIASA's Resources and Environment Area is a case study of eutrophication management for Lake Balaton, Hungary. The case study is a collaborative project involving a number of scientists from several Hungarian institutions and IIASA (for details see WP-80-187). 

As part of the case study, different lake ecological models and water quality management models are under development. The nutrient loads play a distinct role in both kinds of modeling. This is especially so if a comparison of the various approaches is also considered; certainly, the same loading figure must be employed. The objective of the present paper is to determine a nutrient load estimate for Lake Balaton which will then serve as a basis for all the modeling work.