Hydrological signatures of flood trends on German rivers: Flood frequencies, flood heights and specific stages

摘要: Climate change, land-use change and in-stream river engineering affect trends in discharges stages, distinguishing such overlapping contributions is a major challenge hydrologic time-series analysis. In this study, systematic investigation of stages was carried out for 78 stream gauges rivers Germany. We analysed the available times series flood discharges, frequency stage-discharge relationships over time. With respect to annual maximum frequencies, no significant could be identified consistently throughout study area. Significant discharge were at number stations, however, tended catchment-specific. contrast, gauge-dependent, as time are influenced by changes local rating curves thus reach-scale channel modifications. Specific gauge analysis suitable tool analysing changes. No specific most investigated gauges, generally paralleling trend-based stage results same sites. Nevertheless, we identify several with decreasing specific-gauge (e.g., Danube Ingolstadt, Elbe Magdeburg, Weser Intschede) others increasing Dresden, Ems Greven, Fulda Grebenau, Leine Herrenhausen). The small compared on heavily engineered US driven incision or wing dike groyne construction) floodplain displacement changing land use plain). documented here have contributed past intensity German rivers.