Runoff processes and dissolved substances during flood events in small differentially used drainage areas

Flood events are being studied in streams of small drainage basins under different land uses. This research includes study of discharge hydrographs as well as the response of concentrations and loads of several substances, especially those which may originate from arable and pasture land and from fertilizer application and manuring. Only a few flood events are presented and discussed in this paper. Phosphorus, ammonia and dissolved organic substances respond at the beginning of the flood events and attain high levels soon after peak discharge, but concentrations subsequently decline again quickly. The concentrations of nitrate and sulphate are first influenced by dilution effects and then, after