HISTORICAL PRECIPITATION TIME-SERIES FOR APPLICATIONS IN URBAN HYDROLOGY

The quality of results of rainfall runoff modelling depends strongly o n the hydrologic input data. In particular, for urban hydrology applic ations long-term rainfall series without gaps and of high quality and reliability are required in rainfall runoff and hydraulic simulation o f the investigated drainage and receiving water system, The presented study discusses a method for filling gaps in precipitation time series provided by the Emschergenossenschaft and Lippeverband (EG/LV) in nor th west Germany, Various time intervals based on deterministic and sta tistical approaches are investigated. Intervals between 5 and 120 min will be discussed in particular. Several neighbour stations of he EG/L V raingauge network are considered, On the basis of representative exa mples it is shown how the time intervals mentioned above influences th e quality of the estimated gap-filling rainfall data. (C) 1998 IAWQ. p ublished by Elsevier Science Ltd. All rights reserved.