Heavy Precipitation in the Alpine Region (HERA): Areal Rainfall Determination for Flood Warnings Through in-situ Measureme nts, Remote Sensing and Atmospheric Modelling

摘要

Background and key results of the EU-funded projectudHERA are presented. The identification of the growingudpossibilities to use forecast precipitation fields as input forudhydrological models is followed by a broad assessment ofudthe state of the art regarding the determination of theudatmospheric part of the hydrological cycle, with theudgeographical focus on the mountainous region of the Alpsudin the heart of Europe. This includes the construction ofud(north)Alpine radar composites for nine episodes; a firstudsystematic cross-validation on a daily basis of fourudoperational forecasting models with a trans-nationaludgridded observational dataset; several detailed case studiesudinvolving research versions of operational forecast modelsudand the latest advances in model resolution and microphysicaludparameterizations; new algorithms for Dopplerudradar retrievals over complex terrain; and syntheticudmodelling studies with governing parameters derived fromudthe selected cases to investigate some basic processes inudisolation. Finally, implications for proto-type applicationsudof forecast areal precipitation fields in the hydrologicaludmodelling of mountainous catchments are given.