Karlsruhe, Germany
Karlsruhe, Germany

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The following for the extension of the Iffezheim Rhine hydropower plant by a 5th turbine several accompanying environmental measures were agreed in the authorization procedure. These included an improvement of the fish ladder at Iffezheim as well as regional compensation measures. The target was to compensate the environmental impact of the hydropower plant expansion by appropriate measures and significantly enhance the situation of the water bodys in the region.

Zinke T.,Karlsruhe Institute of Technology | Diel R.,Regierungsprasidium Karlsruhe | Mensinger M.,TU Munich | Ummenhofer T.,Karlsruhe Institute of Technology
Stahlbau | Year: 2010

In the past, building structures were often regarded as functional buildings; their cultural significance as well as the interaction with the surrounding environment were frequently neglected. Within the scope of a growing demand fora holistic assessment of building activities, many evaluation criteria going beyond the pure manufacturing cost come to the fore. They are, however, not completely developed for infrastructure buildings. Up to now, no holistic, coordinated system is available facilitating a sustainability assessment similar to building construction. This article presents the current state of the sustainability assessment in bridge construction and shows existing problems and deficits by means of two application examples. In addition, problems to be solved in the future as well as approaches of assessment to be developed are discussed. © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH 81 Co. KG, Berli.

Fuchs S.,Karlsruhe Institute of Technology | Mayer I.,Karlsruhe Institute of Technology | Haller B.,Regierungsprasidium Karlsruhe | Roth H.,Regierungsprasidium Karlsruhe
Water Science and Technology | Year: 2014

Three lamella settlers were monitored over a period of 4 years. The main objective was to determine removal efficiencies for total suspended solids and associated pollutants. For this purpose a new sampling method based on large volume solid samplers was developed allowing a detailed analysis of solids. With regard to total suspended solids the average removal efficiency of the plants range from 49 to 68%. Similar values could be achieved for phosphorus and heavy metals mainly because of the high portion of fine particles in treatment plants' influent. A clear dependency between solid removal efficiency and the parameters maximum surface load and influent concentration could be observed on a single event basis. The aggregation of all findings result in a recommended maximum design surface loading rate (SLR) of 4 m/h. A solid removal rate of 50%, which is defined as minimum long-term efficiency, can be achieved safely at this SLR. In addition to the definition of the maximum SLR, a proper dissipation of the inflow energy and an equal collection of the clear water above the lamellas turn out to be essential. © IWA Publishing 2014.

Armbruster J.,Regierungsprasidium Karlsruhe | Egeling R.,NABU Naturschutzzentrum Rheinauen | Margraf-Maue K.,NABU Koordinationsstelle Rhein | Schafer K.,Bundesministerium fur Verkehr | Spath V.,Nabu Institute For Landschaftsokologie Und Naturschutz
Natur und Landschaft | Year: 2012

Three institutions of the NGO Naturschutzbund Deutschland worked closely with representatives of the federal waterway administration, nature conservation authorities and municipalities from 2002 up to 2010. Their goal was to return the Rhine banks to a more natural state within two projects: 'Restoration of degraded River Rhine sections' and 'River banks in urban areas'. Fixation of the river banks was removed along six sections with a total length of 3.4 km, and the riparian zone was exposed to fluvial dynamics. Pioneer plants have colonized the loamy ground and some endangered species of carabid beetles have been found. None of the measures has been found to generate adverse effects for shipping. The federal waterways authority recently acquired an extended remit to take active steps to attain ecological goals. This new situation presents major opportunities to enhance the ecological quality of waterways and thereby upgrade their functionality as human recreation areas.

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