Evaluation of quality of surface waters. (In Czech.) Methodical Advice of the Czech Ministry of the Environment 72, Prague 1990, p. 101 (not on market) At the occasion of a seminar held on September 11-12, 1990 in Pardubice (East Bohemia) there was published a booklet of collected papers delivered for 70 participants. It was an action within the framework of the programme "Transfer of scientific-technical progress into the practice". An introductory lecture by I. NESMERhK dealt with the evaluation and modelling of the water quality in general. The individual chapters were entitled: Fundamentals, Classifications of water quality, The Norms, Unified criteria of water quality 1982, Czech State Norm 75 7221 (1990), Summation indices of water quality, Application of Q355, Models of the longitudinal section of water quality in running waters, Models for storage reservoirs, Additional models, Comparison with abroad, especially with the USA (EPA).
Z. KUNST described the practical control activity on the water-courses in Bohemia and Moravia. There are 11 main control points which measure three times a week since 1963. There are 254 additional control points with one analysis per month since 1990.
I. BERNARDOVh showed in tables and graphs the results of an evaluation of water quality in the Vltava drainage area made by computers from chemical and biological analyses. The results of chemical analyses must be combined with the biological ones in order to get complex data.
Z. z b o v h referred on the results of water quality in water-courses crossing the border of Austria-Czechoslovakia. The evaluation was made according to the saprobiological analysis using 4 levels (0, b, a, p) and 3 sublevels in between. The worst results were gained after the start of the working season in the beet-sugar industry. Austrian limnologists collaborated with the Czech colleagues intensively.
J. ZAHR~DKA preferred the analysis of the makrozoobenthos in running waters. He used the