Effects of heavy rainfall on construction-related infrastructure : a project of the researche programme "Zukunft Bau" of the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB) carried out by the Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR) within the Federal Office for Building and Regional Planning (BBR) / scientific assistance Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR), division II 6, Dr. Bernhard Fischer ; Bundesinstitut für Bau-, Stadt- und Raumforschung