Four rivers flow into the area controlled by the Upper-Tisza Regional Environmental and Water Directorate. The Tisza from the Ukraine, and the Szamos (Somes), the Kraszna (Crasna) and the Túr (Tur) from Romania. These rivers are rather special because they can produce floods very quickly in any season, leaving very little time for a flood defence response. Thus a timely, precise, reliable flood fo ...