Map of the Surface Covering Deposits of the Tisa River Catchement Area of Transylvania

Abstract

In the Tisa River Project, a great number of field and archive data were collected. The modeling of the surface water flow demands the knowledge of the physical state of the surface layer which receives the precipitations, i.e. the surface covering sediments. For calculating the terms of the infiltration and run-off equations, the use of the USDA classification of the unconsolidated sediments was recommended. Knowing the alteration processes, using the Quaternary and pedologic maps, we converted the data of the geological (chronostratigraphic) maps in the Transylvanian catchment area, into 12 granulometric terms of the clay-silt-sand ternary diagram. In our paper, examples of this kind of transformation will be presented, in areas situated on the plain, between hills, and in mountains with complicated geology and tectonics, too. The whole map covers more than 60.000 sqm, and now, together with the topographical, environmental, and meteorological data, serves for processing the catchment model of the Tisa river.