Exposed Geomembrane System at Großer Mühldorfer See Dam
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (6/2016)
Großer Mühldorfer See, a gravity dam owned by Verbund Hydro Power GmbH, will be part of Reisseck II pumped storage plant. The dam, 46.50 m high, has upstream prefabricated concrete slabs sealed with bituminous material and Kemperol strips requiring repeated repairs. A geomembrane system was installed to water tighten the dam and avoid maintenance. Among the challenges, the remote site location, the conditions of the facing and of the plinth, and the difficult climate. The article describes how design addressed such challenges and how installation was carried out to meet the objectives and deadlines.

Chambon dam: a Struggle against AAR
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (6/2016)
Chambon, a 137 m high concrete gravity dam completed in 1935, is affected by heavy AAR. A series of slot cutting and a drained exposed PVC geomembrane were completed in 1994 and provided an extension of service of 20 years. After new studies and the agreement of the authorities, EDF decided in 2013 to carry out new slot cutting, to reinforce the crown by a system of tendons and carbon bands and to install a new geomembrane.

Planning and Design of Kemah Arch Dam in a Very Strong Seismic Region
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (6/2016)
The Kemah arch dam is situated in Turkey close to the Eurasian Seismic Zone, where the peak ground acceleration of a 2 500-year earthquake reaches to a value of 0.70g. In this paper, the planning and design of the arch dam are reported besides presentation of main features of the project. Based on the results of geological and geotechnical investigation including the karstic foundation, shape of the arch dam was optimized using the time-history approach to cope with the extraordinary seismic loading, and the stresses in the arch dam and foundation were analysed in each time step. Based on the determined tensile and compressive stresses, the required concrete classes were accordingly defined.

Deformation Behavior of Sanibey Dam Concrete Slab Joints
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (6/2016)
The 130.0 m high Sanibey Dam is located on Seyhan River in the southern part of Turkey. Construction of CFRD, concrete faced rockfill dam, was completed at the beginning of 2010 and full reservoir level was reached in 2011. The goal of this study is to present the prediction of joint movements to be expected during impounding, based on the observed settlements as monitored during construction for Sanibey Dam. For this purpose, first, the actual construction stages are modeled in finite element model according to the real construction schedule and then, material properties are obtained from back analysis of construction stage. Finally, instrumentation readings of impounding stage are compared with calculated joint displacement values and discussed.

Modernisation and Enlargement of the Drinking Water Plant Irsch-Treves - The second largest ultra filtration plant in Germany under construction
© DIV Deutscher Industrieverlag GmbH (9/2011)
The modernisation and enlargement of the second largest drinking water treatment plant (WTP) in Germany with the integration of an ultra-fi ltration stage began in February 2011, after more than a year of pilot tests. Following the current timetable the WTP in Irsch-Trier will be fully operational in summer 2013. The plant has a maximum capacity of 1600 m3/h and purifi es about 6 million m3 of drinking water per annum for the city of Treves and some surrounding communities. This paper gives a short description of the Riveris reservoir, the raw water and the existing WTP in Irsch-Treves. Furthermore, the reasons for upgrading the WTP, the targets for the new plant and the results of the pilot project are outlined. The bulk of the paper will however, be dedicated to the operational, design and constructional details of the new plant.

Developing an Integrated Water Resources Management (IWRM) Concept for the Capital Brasília
© DIV Deutscher Industrieverlag GmbH (8/2010)
IWAS-Áqua DF Brasília

Sanitary Engineering Structure and Prerequisite in Minas Gerais, Brazil
© DIV Deutscher Industrieverlag GmbH (8/2010)
Introducing a Decentralised Water Treatment Plant

Raw water quality prognosis
© DIV Deutscher Industrieverlag GmbH (9/2009)
Hydrogeochemical modelling of raw water quality – a planning and forecasting tool Nitrate, denitrifi cation, hydrogeochemical modelling, PHREEQC, raw water prediction

Energy Efficiency in Wastewater Treatment Systems
© DIV Deutscher Industrieverlag GmbH (9/2009)
To “Save money“ is the order of the day – especially due to permanently rising energy expenditure. This is of course also applicable for the cost balance of wastewater treatment plants the yearly cost of which may compose at 55 % from capital and at 45 % from operational costs. These operational costs will consist of payroll costs (45 %), material (10 %), services of other companies (8 %) and various others (5 %). This means that almost a fi fth of the operational costs of a wastewater treatment plant are used for energy. Considerably more than half of them – approx. 60 % – are required for the blower station for biological cleaning. But not only energy costs, also payroll costs and costs for services of other companies highly depend on the chosen compressed air supply.

Fundamentals of pH Measurement
© DIV Deutscher Industrieverlag GmbH (9/2009)
A wide range of possibilities are available for measuring pH values, including colorimetric, photometric, and electrochemical methods. Diff erent measuring processes may result in diff erent measurement results, all of which are in principle correct. To prevent any confusion in this regard, national and international standards specify that pH values are measured electrochemically with a glass combination electrode.

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