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- W1508188041 abstract "“Fish habitat is defined as those parts of the environment that fish depend on, directly or indirectly, in order to carry out their life processes” (Alberta 2003). There are basic requirements that should be available so that fish can successfully carry out their life processes; fish must have food to be able to reproduce and need cover to protect themselves from predators. The biological, chemical and physical features of water streams must be suitable for the reproduction process. Changes in the morphology of water streams are significant factors that influence the habitat quality (Hauer et al. 2006). Geomorphic characteristics, such as channel size, slope, grain size distribution, the spatial configuration of bars and riparian vegetation, strongly influence the structure of fluvial habitats and, as a consequence, the biodiversity and ecosystem function (Zah et al. 2000). Scherer et al. (2006) analyse the correlation between the structural river quality and the existing fish fauna. The study points out that there is a significant correlation between the species composition and the aggregated hydromorphological indicators for the trout and grayling regions. Montgomery (2006) indicates that the historical effects of changes in river geomorphologic processes in the US led to disturbance regimes on salmon populations. This shows the significance of the morphological structure for the ecosystem of watercourses. Over the past centuries, the ecological quality of watercourses in Europe and worldwide has been affected by human actions. Many physical alterations such as flood control measures, barrages, sluices as well as canalization and lining have significantly affected the Ecosystem mainly fish habitat. Improving the status of surface and ground water is a clear objective of the EU Water Framework Directive (EU WFD) to be achieved by 2015 (European Parliament 2000). The EU WFD committed the EU nations to carry out a characterisation of their water bodies by the end of 2004. This entailed a complete analysis of the characteristics of the surface and ground waters in each district, the review of the environmental impact of human activity (industry, farming, etc.) and an economic analysis of water use. The EU WFD also emphasizes the importance of preparing programmes of measures to achieve and maintain the good ecological status of watercourses. The German Ministry of Environment and Conservation, Agriculture and Consumer Protection of the state of North Rhine-Westphalia (MUNLV) has achieved, over the past years, a significant improvement of the chemical status of the watercourses in North RhineWestphalia (NRW). The improvement of wastewater treatment and the decrease of industrial pollutants had a positive effect on the chemical quality already in 2001. Sixty" @default.
- W1508188041 created "2016-06-24" @default.
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- W1508188041 date "2010-03-01" @default.
- W1508188041 modified "2023-10-03" @default.
- W1508188041 title "Rule-Based System for Morphological and Ecohydrological Decision Making" @default.
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- W1508188041 doi "https://doi.org/10.5772/39390" @default.
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