Rainwater Infiltration in Mannheim
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In Mannheim, rainwater infiltration is becoming increasingly important, particularly in connection with new construction, renovations, and urban development. The growing sealing of surfaces nationwide is causing problems such as rising wastewater and drinking water costs, as well as an increased risk of local flooding.
A sustainable solution is to allow rainwater to infiltrate directly on the property. Modern systems, such as soakaways (rigolen) or permeable paving, enable precipitation to seep into the ground on-site rather than being discharged into the sewer network. More and more property owners and developers in Mannheim are choosing this decentralized approach because it reduces fees in the long term while supporting the natural water cycle. Surfaces like driveways or parking areas can be designed with ecological materials so that rainwater efficiently infiltrates instead of running off.
Why is rainwater infiltration important?
Roofs, paths, and streets prevent rainwater from seeping into the ground. Instead, it flows over the surface into the sewer system. During heavy rainfall, this can overwhelm drainage systems and lead to backflow or flooding. Local rainwater infiltration helps relieve public sewers, prevents flood damage, and preserves the natural water cycle.
Whether through swales, infiltration shafts, or underground soakaway systems, professional planning of these systems protects your property from the effects of heavy rain while contributing to resource conservation.
In the video, you can learn more about the relevance of modern infiltration systems and how various solutions can be effectively implemented.
How Can We Support You?
Our Rainwater Infiltration Services in Mannheim Include:
Consultation and Site Analysis:
Hydraulic Verification and Documentation:
Planning and Sizing:
Professional Support from Planning to Implementation:
Installation of Infiltration Systems:
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What is decentralised rainwater infiltration?
When rainwater that has not been polluted with harmful substances infiltrates directly onto the property, this is referred to as “decentralised rainwater infiltration”. The technical issues in this context are regulated by the DWA-A 138 worksheet.
What is a storm drain?
An infiltration trench is an underground trench in which rainwater can infiltrate. Infiltration trenches are mainly planned because of limited space and the relatively simple realisation.
Infiltration trenches can be installed under paved paths and areas accessible by lorries. They can be combined with other techniques, e.g. above-ground depressions (swales).
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Questions and answers
Do you have questions
about Rainwater Infiltration in Mannheim?
Is rainwater infiltration mandatory?
In many new development areas, rainwater infiltration is now regulated through zoning plans or by the responsible water authorities. According to §55 para. 2 WHG, rainwater should ideally infiltrate locally and not be discharged into the combined sewer system.
Do I need a permit to install a soakaway (rigole)?
Yes, generally a permit must be obtained from the responsible lower water and soil protection authority. A soil permeability test (e.g., a percolation test) and an infiltration verification according to DWA-A 138 are often required. We are happy to assist you with the application process and professional planning.
What is rainwater infiltration?
Rainwater infiltration refers to the controlled introduction of precipitation into the soil to relieve the sewer system and support the natural water cycle. It is extremely important and, in many municipalities, now mandatory, especially for new constructions, renovations, and conversions.
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