LST GR1 Geological risk — GIS support for small sewers

Geological risk is based on a relationship between soil vulnerability classification with regard to groundwater, and soil depth. Unlike local retention potential, where soil vulnerability classification is performed with respect to surface water. A soil species with high vulnerability and low soil depth gives high risk scores The purpose of the GIS support is to create conditions at a national level for a reasonable, legally certain and more consistent assessment of the level of protection under Chapter 2, Section 3 of the Environmental Code when examining small sewers. The GIS support consists of maps showing the risk of impact on recipient/exposure point due to load from a drain. The maps have been produced through risk assessments based on the legislator’s instructions on criteria for assessing the high/higher level of protection for the entire surface of Sweden.