Study of parameters that affect treatment effects in different types of stormwater facilities

Important results from the project

The goals have been to develop and improve methods for calculating treatment effects in commonly used stormwater facilities. We have met the goals for the three studied influencing parameters by inventorying more data and developing new adapted functions. This reduces the uncertainty in the calculations. The results will be implemented in the StormTac Web model for international dissemination and use, but can also be used directly or implemented into other models.

Expected long term effects

The results will provide better information for the selection and design of stormwater facilities, such as wet ponds, wetlands, ditches, swales, biofilters and basins. Calculations of their treatment effects and management efforts will be improved as the new functions are based on more data. In the long term, this is expected to enable better calculations of the impact of pollutants and their effects on recipients, in order to be able to investigate the necessary measures to achieve good status.

Approach and implementation

The project followed the schedule and began with literature studies, where the three parameters were investigated. Sufficient new data and methods were inventoried and compiled together with data from the StormTac Database. New functions were developed with adaptation to this data. The data and functions were entered into a report that constitutes a manuscript for an article and a basis for presentations. The functions were further evaluated and improved. The project collaboration worked well.