Geografie 1968, 73, 1-13
Extraordinary Discharge and Precipitation on the Jizera and the Orlice in Hydrological Year 1966
The hydrological year 1966 was characterized on the Jizera and the Orlice (the tributaries of the Elbe) by extremely great stream flow owing to abundant precipitation in winter and especially in summer (the second most humid summer in the last 90 years on the territory of Bohemia after the year 1926). On both the rivers the hydrological year 1966 was the second one with the greatest stream flow in the last 35 years. The annual average discharge on the Jizera in Tuřice was 33,0 m3/s (i.e. 138 % of the long-time average), on the Orlice in Týniště n. Orl. 27,7 m3/s (i.e. 149 % of the long-time average). The hydrological year 1966 has joined the humid period beginning in the hydrological year 1965. The above-average stream flow was influenced primarily by the territory in the slopes and in the Bohemian cretaceous table land being mostly relatively more humid than the mountains. The course of the stream flow of both the rivers was characterized by the long continuance of the high water stages and by repeated flood waves with culminations only exceptionally getting over the values of one year's flood.
