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Ingvertsen S.T.,Copenhagen University | Cederkvist K.,Copenhagen University | Regent Y.,Copenhagen University | Regent Y.,Vestas Inc. | And 3 more authors.
Journal of Environmental Quality | Year: 2012

Roadside infiltration swales with well-defined soil mixtures (filter soil) for the enhancement of both infiltration and treatment of stormwater runofffrom roads and parking areas have been common practice in Germany for approximately two decades. Although the systems have proven hydraulically effective, their treatment efficiency and thus lifetime expectancies are not sufficiently documented. The lack of documentation restricts the implementation of new such systems in Germany as well as other countries. This study provides an assessment of eight roadside infiltration swales with filter soil from different locations in Germany that have been operational for 6 to16 yr. The swales were assessed with respect to visual appearance, infiltration rate, soil pH, and soil texture, as well as soil concentration of organic matter, heavy metals (Cd, Cr, Cu, Pb, Zn), and phosphorus. Visually, the swales appeared highly variable with respect to soil color and textural layering as well as composition of plants and soil-dwelling organisms. Three swales still comply with the German design criteria for infiltration rate (10-5 m/s), while the remaining swales have lower, yet acceptable, infiltration rates around 10-6 m/s. Six of the eight studied soils have heavy metal concentrations exceeding the limit value for unpolluted soil. Provided that the systems are able to continuously retain existing and incoming pollutants, our analysis indicates that the soils can remain operational for another 13 to 136 yr if the German limit values for unrestricted usage in open construction works are applied. However, no official guidelines exist for acceptable soil quality in existing infiltration facilities. © American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.

So far, stormwater runoff from new roads usually was collected and drained without considering alternatives (stormwater drainage approach). But especially in municipal roads, the runoff can also be managed on-site (stormwater source control approach) depending on local conditions. This decentralized approach can also be applied to existing combined or seperated systems when roads are extended or rehabilitaded. For new projects both approaches should be compared. The first part of this paper describes a general method for a comparision of the two approaches. In the second part a practical example is given, where a storm sewer with an end-of-pipe retention and sedimentation tank is compared with an adapted decentralized solution, consisting of infiltration devices with an upstream gully filter.

Lange C.,TU Berlin | Schneider M.,Schneider and oJorde Ecohydraulic Engineering | Mutz M.,TU Brandenburg | Haustein M.,TU Berlin | And 4 more authors.
Journal of Hydro-Environment Research | Year: 2015

A model-based design is presented for restoring the small urban river Panke located in Berlin, Germany. This new design process combines high resolution 2D hydraulic modeling with habitat modeling and river-ecological expert knowledge in a highly iterative way. Advances have been made for the habitat modeling: habitat suitability maps have been developed for fish and the habitat suitability for benthos has been assessed by including groups with different hydraulic preferences.Using the model-based design we have developed preference variants for the Panke which include structures such as pools, riffles, river banks, dead wood as well as aquatic vegetation. To account for the very detailed geometry of some structures such as dead wood, high resolution grids with edge length up to one decimeter have been generated. Furthermore flood protection has been assured. The variants should be constructed in the Panke in 2015. We expect that the ecological conditions for fish and benthos will improve, however this has to be evaluated by further measurements. The model-based approach for the design of enhancement measures delivered valuable hints on current shortcomings in the river morphology, priorities for the creation of new habitats and quantitative information on the increase of suitable areas to be expected. In addition, relating the habitat changes to different flow rates helped to estimate the temporal availability of high quality habitats after the implementation of the measures. © 2015 International Association for Hydro-environment Engineering and Research, Asia Pacific Division.

Agency: Cordis | Branch: FP7 | Program: CP-IP | Phase: ENV.2010.3.1.1-1 | Award Amount: 9.27M | Year: 2011

The European project initiative TRUST will produce knowledge and guidance to support TRansitions to Urban Water Services of Tomorrow, enabling communities to achieve sustainable, low-carbon water futures without compromising service quality. We deliver this ambition through close collaboration with problem owners in ten participating pilot city regions under changing and challenging conditions in Europe and Africa. Our work provides research driven innovations in governance, modelling concepts, technologies, decision support tools, and novel approaches to integrated water, energy, and infrastructure asset management. An extended understanding of the performance of contemporary urban water services will allow detailed exploration of transition pathways. Urban water cycle analysis will include use of an innovative systems metabolism model, derivation of key performance indicators, risk assessment, as well as broad stakeholder involvement and an analysis of public perceptions and governance modes. A number of emerging technologies in water supply, waste and storm water treatment and disposal, in water demand management and in the exploitation of alternative water sources will be analysed in terms of their cost-effectiveness, performance, safety and sustainability. Cross-cutting issues include innovations in urban asset management and water-energy nexus strengthening. The most promising interventions will be demonstrated and legitimised in the urban water systems of the ten participating pilot city regions. TRUST outcomes will be incorporated into planning guidelines and decision support tools, will be subject to life-cycle assessment, and be shaped by regulatory considerations as well as potential environmental, economic and social impacts. Outputs from the project will catalyse transformatory change in both the form and management of urban water services and give utilities increased confidence to specify innovative solutions to a range of pressing challenges.

Sommer H.,Ingenieurgesellschaft Prof. Dr. Sieker mbH | Sieker H.,Ingenieurgesellschaft Prof. Dr. Sieker mbH
WSUD 2012 - 7th International Conference on Water Sensitive Urban Design: Building the Water Sensitive Community, Final Program and Abstract Book | Year: 2012

In the last 15-20 years numerous projects for onsite storm water management in Water Sensitive Urban Design have been realised. Even there is no statistics available about the numbers of projects and the area managed it can be assumed that the amount of area managed by Water Sensitive Urban Design is several km. This amount of disconnected area reduces the runoff into sewers and receiving waters significantly. Many of these systems were built without reviewing the results after installation. In this paper a few projects are mentioned were measurements were made after realisation of the projects to verify the correct function according to the original design. The experiences of a trough-trench-system (infiltration and throttled discharge in the commercial area of Hoppegarten, close to Berlin, are presented. The first systems were built in 1992. More than 15 years of experience were collected during this period. All together 160 ha are managed with storm water systems. The measurements confirm that even with a relatively low infiltration rate of -5*10-6 m/s the precipitation can be retained in the area and slowly discharged into the receiving water. Maintenance is provided by a private company. This includes the parts on the surface and the sewer system. During a minor oil spill it could be shown that the trough-trench system is capable to retain the oil fraction in the topsoil layer of the trough. After several weeks is biodegraded by microorganisms. These results can be confirmed by other project results. It can be stated that infiltration measures like trough-trench-systems can be a suitable measures for on site storm water management, flood protection and treatment of storm water runoff.

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