Description

The ATOM Feed download service for the heavy rain simulation SRI 6 in Wuppertal provides the results of the simulation of a synthetic heavy rain event with the heavy rain index 6 (SRI 6) for download. The simulation was carried out in October 2022 by Dr. Pecher AG (Erkrath) on behalf of the City of Wuppertal. The contract was commissioned by Wuppertaler Stadtwerke WSW Energie und Wasser AG. The dataset provided is part of version 2.1 of the heavy rain simulations, which Dr. Pecher AG has calculated at irregular intervals for the city of Wuppertal since 2018. The simulation approaches are refined with each new version. In addition, the errors detected at the respective calculation time, especially in the terrain model used, are corrected. The simulation takes into account the rainwater runoff in the sewer network and water leaking from the sewer network with a simplified model approach, as well as the different drainage speeds on surfaces with different roughness. As of version 2.1, a moderate infiltration approach is taken into account in the simulation. In addition, the Wupper is modeled with an infinite capacity for the incoming rainwater. There can no longer be a backlog in the simulations, in which the rainwater floods surfaces in the bottom of the valley, because it can no longer be derived from the Wupper. Important note: The simulation results are not accurate predictions of the course of future events in the current state of the art. They contain unrecognised model errors and neglect some effects on which there are no adequate data, e.g. the retention of water due to the flooding of basement floors. The results therefore have a tendency to local over-drawn water depths, which would occur in a real rain of assumed strength. However, the simulation results are well suited for the identification and localisation of the hazards caused by heavy rain, e.g. with the help of the interactive heavy rain hazard map published by the City of Wuppertal and the Wuppertaler Stadtwerke. As precipitation, an extraordinary heavy rain event with a duration of 2 hours and a rainfall of 38.5 l/m² was assumed in the simulation throughout Wuppertal. Such a rainy event has a 50-year statistical return time. The temporal course of the rain event was modelled as Eulerregen Type II. In this case, different intensities are assumed in 5-minute sections, which rise quickly and evenly up to the maximum intensity, then fall sharply and then gradually subside. As a result, three TIFF files with a resolution of 1 m (square pixels whose edge length equals 1 m in the real world) and georeferencing via TIFF World Files are provided under an open data license (CC BY 4.0). The pixel values in the three files indicate the maximum depth of water, the maximum flow velocity and the direction of the maximum flow velocity calculated for the respective grid cell during the simulation. The download service is updated daily by comparison with its metadata and the metadata for the data set “Starkregensimulation Wuppertal SRI 6 (version 2.1 | 10/2022)” in the GEO Catalogue.NRW.

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Name	Format	Description	Link
	0		https://www.gis-rest.nrw.de/atomFeed/rest/atom/ea623895-1a74-44e4-8c28-8e5317b8bc18

Wuppertal ATOM Feed Heavy rain simulation SRI 6 (Version 2.1 | 10/2022)

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