Vízügyi Közlemények, 1965 (47. évfolyam)

4. füzet - Rövidebb közlemények és beszámolók

<81) 1.1

.6.3 Study of fundamental phenomena relating to ice conditions on rivers, in particular: a

) determination of the radiation and lieaL balance of free and ice-covered water surfaces, b

) the role of hydraulic and morphologic conditions in the development of ice covers and ice barriers, and c

) the effect of ice conditions on the conveying capacity of channels. 1.1.6.4 Study of ice phenomena on lakes. 1.2 SPECIFIC ASPECTS OF WATER BALANCES 1.2.1 Continuous analysis of winter water balance on the basis of data obtained from experimental areas. 1.3 HYDROLOGICAL FORECASTING Projects are listed under 1.3 in Section A. 2. Water quality 2.1 STUDY OF THE EFFECT OF HUMAN INTERFERENCE ON WATERCOURSES 2.1.1 Preparation of profiles of pollution and permissible sewage and wastes introduction for critical sections of watercourses, on the basis of systematic data collection, completed with the study of variations with time. Evaluation of relationships between hydrological, meteorological and water quality phenomena. 2.1.2 Evaluation of self-purification potential and loading extended, besides oxygen conditions, to other parameters determined by subsequent studies (e.g. toxic substances, suspended matter, etc.) with special care devoted to barrages, as well as irrigation and industrial diversions existing and contemplated on Hungarian watercourses. 2.1.3 Danube River studies coordinated with similar German, Austrian and Czechoslovakian efforts. 2.2 WATER CHEMISTRY AND BIOLOGY OF RESERVOIRS Recording changes in water quality of hilly- and plainland reservoirs and determining the causes thereof. Rakaca reservoir constructed in hilly country is studied since 1962. The water quality according to layers was determined by four sample series taken in several cross sections. Saprobe biological analyses were also performed in these sections. Investigations will be extended to at least one additional reservoir in hilly country and to further two plainland reservoirs. 2.3 CHEMICAL AND PHYSICAL CHARACTERISTICS OF PRECIPITATION WATER All dry residues, organic matter, N, C0

2, S0

2, P0

4, S0

4 and CI content of precipitation water will be determined and samples collected will be subject to radiological analysis. International cooperation in this question is desirable. 2.4 MODEL- AND PILOT PLANT EXPERIMENTS FOR IMPROVING THE QUALITY OF SURFACE WATERS Determination of the potential fields of application of aeration methods. One of the objectives here is the enrichment in oxygen of canalized river sections by means of devices to be installed at barrages, the" other being the experimental investigation of artificial aeration of small watercourses and canals typical for Hungary, in view of their inevitable pollution.