Vízügyi Közlemények, 1974 (56. évfolyam)
1. füzet - Péczely György: Mértékadó csapadékmaximumok terület-idő függvényei Magyarországon
Mértékadó csapadékmaximumok. 81 2. Compulation aids a ) The average values of annual peak 1-day precipitation Х(т=l) in Hungary are shown in Fig. 1. In this and in the subsequent maps the annual peak precipitation has been identified Willi the peak rainfall in the May August period. For this reason the relations derived apply to storm precipitation only. b) On the basis of Fig. 1 these values can be determined for any region in Hungary. The geographical distribution of the exponent a involved in Eq. (4) is shown in Fig. 2, while the value X a is contained in Table 1. c) For determining the functional relations in Eqs. (4) and (7) four regions representing the main natural-geographical regions of Hungary have been selected, where the pattern of stations is dense and uniform ( Fig. 3). Within the individual regions areas of 1000, 2000, 3000 and 5000 sq. km magnitude have been outlined and on the basis of 20 years long precipitation records the annual peaks X and average annual peaks X of areal precipitation have been determined for periods of T= 1, 2, 3, 4, 5 and 6 days length. For all stations within these regions the annual maxima X of point precipitation have been selected, the averages X thereof and the areal mean values A* of average annual peaks of point precipitation have been computed. These data were then used for evaluating in each of the four regions the function (4) and since the corresponding function values were found to agree very well in the four regions under consideration, the arithmetic mean thereof has been adopted as representative for the territory of Hungary. The function (4) produced in this way is shown in Fig. 4. d) A similar approach has been adopted in deriving the empirical distribution functions, approximating by Pearson Ill-type distribution functions the values of the relation (7) to be observed in Hungary. For T= 1, 2, 3, 4, 5 and (j days these are illustrated in Figs. 5a to /'. On the horizontal axes of these diagrams the magnitude A of the area has been entered on a linear scale, whereas the probability P has been plotted to a logarithmic scale on the vertical axes. The curves represent values of Q. The probable error of the given values of the functions (4) and (7) is compiled in Table 11. An illustrative example is presented for the computations performed on the basis of the aids. * * * Font-lions de surface et de temps des précipitations maxima de projet eil Hongrie par Péczely, György Symboles et définitions : x = précipitation ponctuelle. Quantité de précipitations tombées sur une station d'observation donnée, pendant une durée donnée. X= précipitation ponctuelle maximum annuel. Valeur maximale se produisant au cours d'une année des quantités de précipitations x relatives à une durée donnée, à une station d'observation donnée. X Maximum annuel moyen de précipitation ponctuelle. Moyenne pluri annuelle représentative au point de vue du climat, des maxima de précipitations A' d'une station d'observation donnée. X* = Moyenne géographique du maximum annuel moyen de précipitations ponctuelles. Moyenne arithmétique des valeurs X des stations à l'intérieur d'une zone donnée. x ' = Précipitations de surface. Moyenne arithmétique des valeurs x des station à l'intérieur d'une zone donnée. X'= Maximum annuel des précipitations de surface. La plus grande valeur des x' se produisant au cours d'une année dans une zone donnée.
