Vízügyi Közlemények, 1982 (64. évfolyam)
3. füzet - Bárányi Sándor és Csuka József: A BALATON VÍZKÉSZLET-SZABÁLYOZÁSA
A Balaton vízkészlet-szabályozása 363 различных вероятностей показано на рис. 7. (то же для периода убывания — рис. 8.. для периода аккумуляции — рис. 9.) Автор установил значения водных ресурсов, распологаемых с вероятностью 80%. В годовом разрезе они составляют 187 милл. мя ; на период убывания приходится 32 милл. м\ на период аккумуляции — 78 милл. м\ Данные о водопотреблении и формировании ресурсов за 1980 год автор сгруппировал в таблицу VI. Установлено, что в летний период баланс между ресурсами и потребностями приобретает критический характер, поскольку при убывании ресурсов приходится поддерживать высокие уровни воды в озере и кроме того удовлетворить запросы других потребителей. * * « Results of water-oriented research on Lake Balaton The water balance of Lake Balaton 1. Controlling the water resources of Lake Balaton by Dr. S. В ARANYI The quantitative determination of the water resources represented by the volume of water contained in Lake Balaton, with the aim of meeting the demands of the various consumers constitutes one of the most urgent and most important tasks of the Hungarian water authorities. The water of Lake Balaton has been developed for a variety of purposes and the lake waters are controlled as required by the interests of the users. The primary purpose for which the lake is being controlled at the present is recreation. For controlling the lake water level new operating instructions have been introduced in 1977 (Fig. I ), the release sluice at Siófok and the Sió-Canal have been enlarged (VIZITERV 1976), a new method of hydrological forecasting has been developed and used for operative purposes ( Bartha Hirling 1979). Over the past 10 years the water level in Lake Balaton has been controlled to maintain a level which is higher by 0.14 m on the average than in the previous decades (Table 1 ), and in this way low water levels detrimental to recreation have been succesfully avoided ( Baranyi 1982). Starting with 1921 monthly and annual water balances have been prepared for Lake Balaton by solving Eq. (l)(Szesztay 1962, Baranyi 1975, Faludi 1976, Mrs. Papp 1982). A new empirical relationship (2) has been developed for estimating evaporation. The average values for the period 1921 80 of the individual terms of the water balance were found to be lower than the averages for the previous 50 years ( Table III ). In estimating the water resources of the lake, allowance has been made for the diversions from the lake itself and from the tributary catchment. Table I Kshows the quasi-natural variations in storage, i. е., the different probabilities of occurrence of monthly- and annual changes in storage estimated by eliminating the effect of releases and water diversions. The statistical characteristics estimated on the basis of the cumulated data on quasi-natural variations in storage over periods with rising and falling levels are shown in Figs. 3 and 4. The hydrological possibilities of storage in the catchment have also been studied ( Domokos Mrs. Gilyén 1981). The studies presently under way are concerned with the determination of the supplies which can be developed without detriment to the specified lake water levels ( Water Management Institute 1981). 2. The water resources available for development in Lake Balaton and the tributary catchment by J. CSUKA The rational development of the water resources of Lake Balaton and the tributary catchment was defined in the regional plan promulgated in 1957 and approved after a round five-year period of practical application by the Government Order No. 1023/1963 (IX. 21).
