way sign to koblenz deep in the mosel flood

water river waterway vehicle reflection boating boat pond tree lake canal reservoir sea watercraft person bridge plant wetland road sign koblenz deep mosel flood koberngondorf village lower valley cochem northern eifel side may saar wave reached area 19th still slowly lowering 20th disaster catastrophe climate change environment desaster disastrous natural hazard human instigated disasters anthropogenic caused manmade flooded flash muddy accidents power land shore flowing fast