Abstract
The paper provides information about the activities, work and results of the working group "Lakes and water reservoirs in the Czech Republic" during the Intensive Programme ERASMUS in August 2003 in Prague. First part of the article provides information about water reservoirs in the Czech Republic, the second describes the excursion to the Třeboň basin, and finally we present basic information about the youngest lake in the Czech Republic, Mladotické Lake, which we also visited during our field programme.