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- Becker, A, et al.
(författare)
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Practical Experiences from Existing Case Studies and Pilot River Basins
- 2010
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Ingår i: Water Framework Directive. - London : IWA Publishing. - 9781843392736 ; , s. 99-202
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Water resources planning and management and the development of appropriate policies requires methodologies and tools that are able to support systematic, integrative and multidisciplinary assessments at various scales. It also requires the quantification of various uncertainties in both data and models, and the incorporation of stakeholders participation and institutional mechanisms into the various tools and risk assessment methodologies, to help decision makers understand and evaluate alternative measures and decisions. This requirement has been explicitly recognised in the context of the European Union Water Framework Directive (WFD). This book is one of the concrete outcomes of the Harmoni-CA concerted action (supported by the European Commission). It provides a framework for model-supported participatory planning of measures at various river basin scales and practical guidance to water managers and other interested stakeholders on the model-supported implementation of the WFD. The objective of the book is to offer guidance to water managers on the model-supported implementation of the Water Framework Directive at the level of a river basin district and at other levels (such as sub-basins, national, or international scale in the case of international river basins). It should help water managers to better understand how models may be used for planning purposes, while special attention is given to the problem of predicting an uncertain future, one very likely to differ from the present. Six case studies from different parts of Europe are provided to illustrate the practical applicability of the planning framework in the WFD implementation. They are very important for illustrating how concepts from earlier parts of the document are applied to real-world situations. The case studies cover several aspects of mesoscale river basin management, water quantity and quality issues, and the role of modelling, with two case studies located in pilot river basins. This text is intended for use by water managers and hydrologists engaged in the implementation of the Water Framework Directive.
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- Stålnacke, P, et al.
(författare)
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Changes in nutrient levels in some Eastern European rivers in response to large-scale changes in agriculture
- 2004
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Ingår i: Water Science and Technology. - 0273-1223 .- 1996-9732. ; 49:3, s. 29-36
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Tidskriftsartikel (refereegranskat)abstract
- Since the late 1980s, the use of commercial fertilisers in most Eastern European countries has decreased at an unprecedented rate. We examined the impact of this dramatic reduction in agricultural inputs on concentrations of nutrients in four rivers in Eastern Europé: the Emajogi and Õhnejogi (Estonia), the Daugava (Latvia), and the Tisza (Hungary). Time series of nitrate (NO3-N) and phosphate (PO4-P) concentrations and data on runoff were selected to represent catchments with substantial areas of agricultural land and available time series of sufficient length and frequency. The study period was 1987-1998. We detected downward trends in nitrate-N and phosphate-P in only two of the four rivers. Our results imply that the response to the extensive decrease in agricultural intensity since the late 1980s has been slow and limited in many rivers. Corresponding results in the literature are inconclusive and comprise several examples of both decreasing and non-decreasing nutrient concentrations. Our findings, along with similar data from other studies, indicate that large cuts in nutrient inputs do not necessarily induce an immediate response, particularly in medium-sized and large catchment areas. Moreover, the difference we noted between nitrogen and phosphorus suggests that factors other than reduced fertiliser application influenced the inertia of the water quality response.
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