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The municipal water supply and wastewater disposal show a huge potential for an increase in energy efficiency and a reduction in the running operational costs in different areas. Through specific analysis of individual processes, extensive findings about the condition of the technical facilities as well as the exact potentials for energy consumption and cost reduction can be obtained. Moreover, waterworks and wastewater treatment plants as a rule have at their disposal a corresponding supply of sites which can be suitable for sustainable usage of technologies for the environmentally friendly generation of electricity. Hence, either a reduction of the energy procurement through energy generation is achieved or a return on the basis of the Renewable Energies Law (EEG) feed-in tariff for the feeding into the grid of the public supply is realized benefitting the municipal suppliers and waste management companies and, ultimately, also the power recipients.


The project IWAS-ÀGUA DF focuses on creating the scientific base for an IWRM concept for the Brasília region. A focus of the study is the dynamic land-use/land-cover change which has caused severe impacts on water resources, while effects of climate change during the last three decades are thought to be rather moderate. Effects on water quantity are most distinct during base flow conditions. Areas with substantial expansion of agriculture, i.e. mostly cropland, show a drastic decrease of base flow discharge. We assume two processes to be responsible, higher evapotranspiration of crops and an increasing extraction of water from groundwater and surface water mostly for irrigation purposes. A similar effect of urbanization on runoffwas observed only for one river basin. However, we found urban areas have a negative impact on water quality. This is especially true for COD, NH4 +, and turbidity. In the future, we assume also emerging pollutants, i. e. organic (micro)pollutants to play a major role. Results of our study will be a first contribution to an IRWM concept for the Brasília region and might help to maintain high standards in water supply for the region.


Lorz C.,Sudan University of Science and Technology | Abbt-Braun G.,Karlsruhe Institute of Technology | Bakker F.,Companhia de Saneamento Ambiental do Distrito Federal CAESB | Borges P.,Helmholtz Center for Environmental Research | And 15 more authors.
Environmental Earth Sciences | Year: 2012

Land-use/cover change (LUCC) and climate change are major controlling factors for water resources in the Distrito Federal in Western Central Brazil. Dynamic LUCC in the region has severe impacts on water resources, while climate changes during the last three decades is thought to have only moderate effects. LUCC affects water quantity mostly during base flow conditions. River basins with substantial expansion of agriculture since the end 1970s show a dramatic decrease of base flow discharge by 40-70%, presumably due to irrigation. In contrast, the effects of urbanization on runoff are less distinct, since factors controlling runoff generation might be more variable. For water quality, we found urban areas to have a strong influence on the parameters CSB, NH 4 +, and suspended solids. In addition, we assume emerging pollutants, e. g. organic (micro)pollutants, might play a major role in the future. The project IWAS-ÁGUA DF focuses on creating the scientific base to face these problems in frame of an IWRM concept for the region. Results of our study will be a contribution to an IRWM concept for the Distrito Federal and will help to maintain high standards in water supply for the region. © 2011 Springer-Verlag.


Aster S.,Ludwig Maximilians University of Munich | Vasyukova E.,TU Dresden | Ripl K.,TU Dresden | Kuse B.,Sachsen Wasser GmbH | And 6 more authors.
GWF, Wasser - Abwasser | Year: 2010

(Figure Presented) Fig. 1. Partners of the project "IWAS-Áqua DF Brasília". (Drawing: S. Aster) In recent years awareness of a sustainable usage for limited fresh water resources has been raised all over the world. With an Integrated Water Resources Management (IWRM) the water sector has a powerful instrument at its disposal. IWRM can offer solutions for an ideal correlation of scarce water resources and water demand in quantity and quality particularly in arid areas. The Project IWAS-Áqua DF Brasília faces the urgency to take actions to secure the water supply of Brazil's capital Brasilia and its Federal District (DF) which is confronted with a growing population in combination with major changes in land use (e.g. intensification of agriculture) and extreme climatic conditions (pronounced dry season) [1]. The main objective is to develop an Integrated Water Resources Management plan regarding natural boundary conditions (climate, land use, urban structure, etc.), water supply systems (drinking and wastewater treatment and distribution system) and management issues. An overview of all Brazilian and German partners who are involved in the project "IWAS-Áqua DF Brasília" is given in fig. 1 .The following article presents the current and future project work in the fields of drinking water supply, urban drainage and wastewater treatment.


Korner M.,Sachsen Wasser GmbH | Reik J.,Sachsen Wasser GmbH | Wummel J.,Sachsen Wasser GmbH
GWF, Wasser - Abwasser | Year: 2015

The purpose of this article is to share experience how supporting participation and informed dialogue can contribute to improved awareness and better management of drinking water supplies. The article describes the process of participatory identification of priority information needs, the establishment of an effective communication structure, achievements, obstacles and lessons learnt during the implementation of the Stakeholder Participation Programme.


Rohde B.,Sachsen Wasser GmbH
WasserWirtschaft | Year: 2010

For ten years now the Sachsen Wasser GmbH Leipzig, a 100-percent subsidiary of the KWL - Kommunale Wasserwerke Leipzig GmbH Leipzig, has been successfully and internationally active as a consultant and manager. The Saxon company specializes in being a service provider in commercial and technical consultation and works management services for the water/wastewater sector outside of the supply area of the KWL, and imparts to its partners know-hows in water supply and wastewater treatment.

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