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Groundwater Dependent Ecosystems (GDEs) frequently exhibit rich biological diversity and can provide enormous economic wealth. In recent years, GDEs in many industrialized countries have shown signs of serious degradation, primarily the result of groundwater abstraction and pollution. Many such systems, including a number of well documented cases in Eastern Europe, are no longer sustainable. As a consequence, the conservation and sustainable management of GDEs has emerged as one of the most urgent environmental research priorities of our time. A large percentage of the world’s population lives in cities and either depends on, or is affected in some way, by groundwater. Moreover, groundwater has become a very important and complex issue that attracts the interest of many diverse stakeholders. Many problems related to groundwater and ecosystems are shared by countries throughout the world and there is growing recognition that much can be gained by co-operation on an international scale. This is no time to be complacent and it is critical that key problems be identified, that the potential consequences of these problems be understood, and that the development of solutions begins urgently. Important data gaps must be recognized and filled without delay.

General ecology and biosociology --- ecologie --- milieuzorg --- geologie --- Geology. Earth sciences --- Environmental protection. Environmental technology --- milieubeheer --- Groundwater ecology --- Groundwater flow --- Biotic communities --- Ecologie de l'eau souterraine --- Eau souterraine --- Ecosystèmes --- Congresses --- Congrès --- Ecoulement --- EPUB-LIV-FT LIVECOLO LIVTERRE SPRINGER-B --- Geology. --- Environmental sciences. --- Applied Ecology. --- Environmental Science and Engineering. --- Geotechnical Engineering & Applied Earth Sciences. --- Water Policy/Water Governance/Water Management. --- Environment, general. --- Ecology --- Environmental protection --- Nature conservation --- Environmental science --- Science --- Geognosy --- Geoscience --- Earth sciences --- Natural history --- Geotechnical engineering. --- Environmental management. --- Environment. --- Applied ecology. --- Environmental stewardship --- Stewardship, Environmental --- Environmental sciences --- Management --- Engineering, Geotechnical --- Geotechnics --- Geotechnology --- Engineering geology --- Balance of nature --- Biology --- Bionomics --- Ecological processes --- Ecological science --- Ecological sciences --- Environment --- Environmental biology --- Oecology --- Population biology --- Hydrobiology

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National and global security can be assessed in many ways but one underlying factor for all humanity is access to reliable sources of water for drinking, sanitation, food production and manufacturing industry. In many parts of the world, population growth and an escalating demand for water already threaten the sustainable management of available water supplies. Global warming, climate change and rising sea level are expected to intensify the resource sustainability issue in many water-stressed regions of the world by reducing the annual supply of renewable fresh water and promoting the intrusion of saline water into aquifers along sea coasts, where 50% of the global population reside. Pro-active resource management decisions are required, but such efforts would be futile unless reliable predictions can be made about the impact of the changing global conditions on the water cycle and the quality and availability of critical water reserves. Addressing this wide spectrum of issues, a team of expert authors discusses here the impacts of climate change on the global water resources, the long-term resource management goals at global and local scales, the data requirements and the scientific and technical advances necessary to mitigate the associated impacts.

Meteorology. Climatology --- Geology. Earth sciences --- Environmental protection. Environmental technology --- Production management --- hydrologie --- duurzame ontwikkeling --- geografie --- milieubeheer --- klimaatverandering