RECHNERISCHER NACHWEIS DER UBERSTAUHAUFIGKEIT AUF DER BASIS VON MODELLREGEN UND STARKREGENSERIEN

Mathematical Proof of System Surcharge Frequencies on the Basis of Design Storm an Rainfall Data. The revised German Standard – ATV – A 118 for the design of urban drainage systems was published in November 1999. The return period of computed water levels above ground at manholes is suggested as a new criteria to show evidence of sufficient hydraulic performance. The two possible methods of specifying system load, using either design storm concepts or historical rainfall data, are characterised in view of this application.