Lime Treatment: New Perspectives for the use of Silty and Clayey Soils in Earthen Hydraulic Structures
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (5/2013)
This paper describes the SOTREDI project, “Soil TREatment for Dikes”, undertaken by Lhoist Group, a lime producer, since 2005. This project was led in partnership with research centres and universities, and presents new perspectives for the use of soils in hydraulic context. The objective was to demonstrate that soil treatment with lime, besides enhancing the materials workability, confers high levels of mechanical properties and low permeability values. Lime-treated soils also offer a reduction of piping and internal erosion hazards, and significantly increase the erosion resistance against overtopping and overflowing.
Pressure of Urbanisation and a Sustainable Sanitation Infrastructure:
Experiences with a Research-Driven Planning Method in Northern Namibia
© DIV Deutscher Industrieverlag GmbH (9/2012)
Improvements in sanitation infrastructure in developing countries are of major importance. CuveWaters, a research project working in the north of Namibia, is piloting decentralised technologies for water and sanitation. Technologically sophisticated concepts can easily clash with users’ needs and everyday behaviour. There is not always a shared understanding of planning and maintenance. A demand-responsive approach has therefore been developed. It aims to support the planning and implementation process and to include stakeholders prior to intervention, thus allowing mutual learning as a basis for a sustainable transformation process in urban areas. This paper discusses method development, empirical application and results.
Biofilms on aged Materials in Household Installation Systems
© DIV Deutscher Industrieverlag GmbH (8/2010)
The causes of contamination originate in the water itself and on materials in contact with water. Drinking water is not sterile and does not have to be. Water treatment plants’ strategy consists in removing the nutrients that bacteria feed on to produce “biostable” drinking water. This allows in many cases chlorination to be avoided. But it is known that even biologically stable drinking water with very low nutrient content still contains micro-organisms. These micro-organisms can multiply themselves if they encounter nutrients.
Economic Considerations in Flood Risk Management
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (9/2004)
Elaboration and utilization of sound economic information are highly relevant for decision-making in integrated flood risk management. This strategy aims at the development and execution of flood action plans which combine measures of natural flood retention, technical infrastructure and further-reaching precautionary activities.
Quality Assurance of HFI-Pipes
© Vulkan-Verlag GmbH (3/2004)
To ensure a constant high quality at the production of longitudinally welded line pipes with the HFI-technology an extensive quality management system is indispensable.