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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Sediment management of rivers and water framework directive: the case of the spree river
Sediment management of rivers and water framework directive: the case of the spree river
Author : MICHAEL NONES (1)
The European Water Framework Directive 2000/60/EC (WFD) is one of the most important legislative instrument
introduced in the field of water policy during the last 40 years. Its main goals are to achieve, at least, a good ecological
and chemical status for surface waters and a good quantitative and chemical status for groundwater by 2015, on the
basis of a basin management approach.
Despite of its advanced theoretical background, this Directive presents some weakness, such as the negligence of the
hydromorphological elements into the classification system of water bodies. Potentially, this lack could permit further
alteration of waters and the failure of the Directive¡¯s goals. Hydromorphological aspects provide an essential support in a
variety of environmental processes, such as purifying pollutants, recharging ground waters, reducing the erosive action
of floods on infrastructures. On the other hand, hydromorphological conditions constitute fundamental features of any
water bodies and have an intrinsic value of existence, regardless their supporting role for biological elements. In contrast
with their important and recognized role for ecosystem, the WFD explicitly considers the hydromorphological elements
only in the case of water bodies with a ¡°high¡± ecological status (or maximum ecological potential, for heavily modified
and artificial bodies). The assignment of water bodies to the ¡°good ecological status¡± (or good ecological potential) class
is made only on the basis of biological and physico-chemical monitoring results, while the other three classes
(¡°moderate¡±, ¡°poor¡± and ¡°very poor¡±) rely only on biological quality elements. In this light, the revision process of the
WFD Basin Management Plans, forecasted in 2016, requires a more widespread consideration of the
hydromorphological elements.
To give an example of the strict relationship between sediment transport and ecological status of rivers, a reach of the
Spree River near Cottbus, Brandenburg, Germany, is studied. In this reach a restoration project, beginning in 2006, has
the aims to increase the ecological status of the river and fulfill the WFD goals, but the suspended sediment transport of
sand, especially in correspondence with flooding events, could threaten these objectives. For this reason, in addition to
the River Basin Management Plan required by the WFD, a sediment management plan at basin scale is necessary.
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Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 19/08/2015
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