A means to succeeding with implementation of cloudburst plans for the municipalities of Copenhagen and Frederiksberg is the use of SUDS (Sustainable Drainage Systems) for infiltration of rainwater. The purpose of the project was to evaluate the consequences of increased storm water infiltration to the surrounding areas, including changes in groundwater levels and quality.
The evaluation of potential storm water infiltration was done using a fully integrated hydrological model in a 10 x 10 meter grid resolution. Thus, a part of the project was collection and utilization of detailed data for describing e.g. sewer systems, drains, paved area, land use and near surface geology. Furthermore, the location of the shallow groundwater table has been mapped through review of available hydraulic head data. Using the hydrological model different scenarios for storm water infiltration as well as climate conditions (both present and future climate conditions) have been evaluated. Results included the changes in groundwater table location and amounts of drainage water, as well as a pollution risk assessment of the groundwater. The potential for using SUDS was described and illustrated for the various scenarios using maps showing the geographical potential for SUDS.
Services we deliver
- Collection of relevant data such as location of sewers and drains.
- Mapping of near surface groundwater table.
- Update of the near surface geology
- Establishment of a fully integrated hydrological model in a 10 x 10 meter grid resolution
- Evaluation of the effect of the different infiltration scenarios including the effect of future climate change.
- Definition of SUDS potential for various infiltration scenarios
- Groundwater quality risk assessment for the different infiltration and climate scenarios.