The pier blocked the river bed and formed a dam during the flood of 1992. Then the stream which broke the dam destroyed a house. Most channels of small rivers were exposed to anthropogenic impact. Traces of skidding were registered in every third stream in the upper reaches of the rivers Black Tisa, White Tisa, Teresva, Terebly and Reky. During storm rainfalls the water does not soak into soil, it forms puddles on the plain and runoffs down slopes in mountains.
Forest is a natural runoff speed controller.
Research showed that slowest runoff is registered in mature deciduous forests, it is twice faster in coniferous forests, and 100 times faster in cleared areas. That proves connection between floods and deforestation. Chaotic felling which is typical for the Transcarpathian region today is a trigger to the tragedy. According to F. Tyutyunik, main reasons of the disaster in 1998 were precipitation and landscape yielding. Ploughed fields should be laid out across highlands, not in concordance with a square or a rectangle.