Geomorphological effects of the catastrophic drainage of artificial reservoir in the Młynówka valley at Górowo Iławeckie, Poland

The problem concerns the catastrophic flood flow caused by the breaking of the dam of the artificial reservoir in the valley of the small river Młynówka Górowska. Extensive studies were focused on the section just below the broken dam, were the geomorphological effects of that event were most noticeable. A number of erosional and accumulative forms have been distinguished. The structure and grain size of the flood deposits have been studied. The occurrence of deposit sequences characteristic of slurry-flows has been found. The rapid fall of the flood wave was associated with the deposition of the coarser deposit fractions on the sides of the valley and of the finer ones on its floor.