Effective drainage in an attractive urban district
The new housing estate "Moerser Straße West" in the North Rhine-Westphalian town of Kamp-Lintfort in Germany demonstrates how near-surface drainage functions optimally in the context of future-oriented housing development.
Designation of new building areas
One of the most important issues for every city and municipality is the designation of new building areas. However, planners must also always bear in mind that every new building area entails the sealing of surfaces and that effective drainage solutions must therefore be found.
A positive example of forward-looking urban land use planning and future-oriented settlement development that takes into account near-surface drainage is the city of Kamp-Lintfort in North Rhine-Westphalia in Germany. Because the demand for residential plots has grown in recent years, the city began planning the new urban quarter "Moerser Straße West" as early as 2002. In the meantime, all three construction phases have been completed.
Urban living in a central location in the countryside with a mix of housing types
On land formerly used for agriculture, an attractive and uniformly planned new housing estate has been built near the city centre based on the guiding principles of "urban living in a central location" and "living in the countryside". Single-family houses, semi-detached houses and terraced houses as well as multi-storey flats were built on a total area of around 10.3 hectares. Such a mix of housing types with both privately financed and publicly subsidised flats consolidates social structures and sustainably secures the stock of the residential area.
The entire building area was divided into areas corresponding to different building typologies and thus blends harmoniously into the surroundings in terms of urban development. The design rules that had to be adhered to by the builders concern, among other things, the roof shape, pitch and colour as well as the façade materials and colours, but also allow for individual design options due to various possible combinations.
Decentralised and near-surface drainage
In order to ensure that the precipitation water from the properties can be optimally drained locally and close to the surface in accordance with § 51 a of the State Water Act, infiltration trenches are used as infiltration structures. Their bottom depth is at least two metres below the ground surface, which is a sufficient distance from the groundwater surface. Depending on the structure, the dimensions of the infiltration trenches are variable, as they depend on the locally applicable permeability coefficient and the connected sealed area. Shaft structures are not found in the entire new development area. Instead, the precipitation water from the paved public areas is collected via drainage channels.
Use of the drainage channel MAXI
Our MAXI linear drainage system was used. Depending on the hydraulic performance requirements, channel elements with three different nominal sizes (100 to 400 mm) were installed. The channel bodies made of fibre-reinforced concrete C35/45 can be used for roadways, industrial areas with heavy transport and also airfields and harbours with high wheel loads (250 kN to 900 kN test load according to DIN EN 1433) due to a 5 mm thick edge protection and the robust gratings made of ductile cast iron.
Via the drainage channels with a nominal width of nominal width 400 mm, the surface water of the public areas reached a central infiltration basin. In total, there are two such basins in the new urban quarter, which are integrated into the green space in terms of design and are conceived in such a way that impairment by incoming alluvial substances is prevented with the help of an upstream settling area.