Vízrajzi Évkönyv 88., 1983 (Budapest, 1984)
Tartalomjegyzék
FOREWORD The Hydrographic Yearbook has been published with the aim of summarizing,disseminating, occasionally illustrating the main data characterizing the hydrological measurement and observation system, as well as the hydrological conditions in Hungary over the year, further of analysing the hydrological events and the variations thereof. The Hydrographic Yearbook comprises accordingly a chapter presenting a list of 800 stream gages, 2382 shallow groundwater wells, 548 deep wells /on artesian- and karstic waters/, 8B springs and 1448 meteorological stations, the schematical map of the standard network, the grouping according to streams and the filing data of the stream gages. The main particulars of the hydrological and hydrometeorological networks operated by the district water authorities, the Research Centre for Water Resources Development and the National Meteorological Service have been tabulated. The areal pattern of the stations within the network is shown on the maps attached to the Yearbook. The chapter entitled "Hydrological conditions over the year" describes the precipitation-, air temperature-, sunshine duration- and evaporation conditions, the hydrological characteristics of surface waters, presents data on ice conditions and depths over fords, on the inundations caused by undrained surface runoff, on pumped drainage, further the main hydrological characteristics of unconfiried groundwater, springs and deep aquifers. The Chapter on surface waters contains the daily stages on 161 gages, the monthly and annual lowest-, mean- and highest stages,as well as the extreme stages on record for 62 gages, the daily discharge through 49 gaging cross sections, further the water temperatures measured at 46 gages. Information is presented further on the sediment- and ice regimes on the major rivers, as well as on the variations in the depth over the fords on the Danube. In the cross sections, where the streamflow rate is influenced significantly by surface slope, the streamflow has been determined in terms of the stage and surface slope, attaching also the auxiliary tabulations needed for the calculation. The data have been plotted in the form of stage hydrographs and diagrams showing the variations of cross-sections, water- and air temperatures, ice conditions and depths over the fords. The chapter on subsurface waters contains the water levels in 2.88 shallow wells, the hydrographs of 4t> wells, the map showing the areal variations of the groundwater table, the water levels in 57 wells on artesian , and those in 46 wells on karstic waters, the hydrographs for five deep wells, the yields of 20 springs and the yield hydrographs of two typical springs. The chapter entitled "Hydrometeorological data" presents information on the variations in precipitation over the year, over seasons and over the growing season, contains monthly data of 854 rain gages, further the data of high-intensity rains. The variations of snow cover thickness and snow-water equivalent at 52 stations have been tabulated. Data are published on air temperature, sunshine duration and evaporation from the open water surface, the areal pattern of air temperatures being shown graphically. The major part of the hydrological observation- and measuring network was transferred for operation to the district water authorities in 1981, where most of the observation data and records have been processed. The Hydrographic Institute of the Research Centre for Water Resources Development has been responsible for hydrological observations on the lakes Balaton and Velence, further for streamflow measurements on the Danube and Dráva rivers, as well as for the operation of the observation networks on karstic- and artesian waters. The majority of the meteorological data has been made available by the National Meteorological Service. Comments on the present volume by the users of the Yearbook are invited and will be appreciated. Budapest, November, 1984. Dr. L. Ivicsic Dr. L. Go d a Cand.Techn.Sci., scientific adviser Cand.Techn.Sei. Director»Hydrographic Institute Dr. Gy. Kovác s Corr.M.Hung.Acad.Sei. Director General, Research Centre for Water Resources Development- 11 -
