Extreme weather events as impacts of climate change are expected to cause surface water run-off, inland flooding from rivers and tidal flooding. At the same time growing urbanisation and intensive development measures cause the sealing of surface and overcharge drainage facilities and reduce the infiltration of run-off and excess water into the ground. In addition, the melting of glaciers and snow covers cause increased run-off. As consequence the risks of floods increase and the endangered areas have to be protected by dams and dikes (see also excess water).