Hidrológiai Közlöny 1987 (67. évfolyam)

2-3. szám - Levelek

Ar: 100. — It CONTENTS 65 Pálfai, I.: Use of drainage networks for conveying irrigation water in the Great Hungarian Plains 70 Mike, K.: Problems in paleohydrography 79 Siposs. Z.: The significance of Oligocene clays in the regional aquifers of NorthHungary 85 Neumann, L.: The air-lift pump 93 Ruttkay, A., Kepenyes, J.: A new method for calculation of water requirement of fishproduction 101 Juhász, £.: Sludge composting in combination with other recoverable substances 114 Czakó, L., Miháltz. P.. Üveges. G.: Biological denitrification at waterworks 121 Andrik, P., Takács, S.: Bacteriological investigations on a research basin for nonpoint source pollution 127 Gorzó. G.: The influence of physical and chemical factors on the germation cf spores of heterocystic cyanobacteria in Lake Balaton 134 Hegedűs. J.: Phytoplanktcn of River Danube above Budapest at river station 1659 km. Part II b: Qualitative analysis 140 Vitális, G.: Hydrogeologie information derived from maps published in the second half of the XVIII th century 149 Grauzer, 8. : Some FORTRAN subroutines for primary hydrological data processing 156 News 165 International Hydrological Program 168 Books 172 Conference Calendar 173 Obituary: Prof. Dr. Kurt Sauer 174 Tender 175 Letters