In the 20th c., after the disappearance of the system of small retention (number of artificial ponds, channels etc.) due to economic changes, ford tridon on the rivers (Kamionka, Czarna Konecka) appeared events previously unknown during the whole Holocene.There are catastrophic flash floods caused by hydrotechnical damage.
Geomorphological effects of these floods exceed many times the lexus rc4 effects of secular processes.