Workshop on hydro-morphological measures under the Floods and Water Framework Directives - Finding synergies and addressing challenges
4-5 December 2018 in Budapest, Hungary
"According to Article 4 of the WFD, the assessment of good ecological status and potential needs to be based on biological quality elements (BQEs) and supporting physico-chemical and hydromorphological quality elements. The ecological status of a river can be assessed by evaluating indicators for the composition, abundance, species diversity or absence of various groups of organisms known as biological quality elements. BQEs that can be used for the classification of a water body’s ecological status include phytoplankton, macrophytes and phytobenthos, benthic invertebrates fauna and fish fauna. Complementary hydromorphological quality elements are 1) morphological conditions 2) hydrological regime (rivers and lakes, 3) river continuity (rivers) and 4) tidal regime (coastal and transitional waters)."
"Since centuries, urbanization has been accompanied by the construction of flood control infrastructures (levees, retention basins, channel straightening, transversal barriers etc.). In order to protect population and assets, such structures often interrupt river continuity, i.e. by disconnecting channels from floodplains, creating longitudinal barriers between upstream and downstream and straightening river stretches. Flood control can also be exerted by management of vegetation and/or sediments (e.g. selective cuts, dredging, etc.). Such actions may alter the ecological dynamics. "
"As hydromorphological aspects between the Water Framework Directive (EU Directive 2000/60 - WFD) and the Floods Directive (EU Directive 2007/60 - FD) refer to the same fluvial processes, the issue of hydromorphology and flooding has been addressed several times within the CIS process."
(Above some basic information from the "Background paper with conclusions from the workshop - “Hydro-morphological measures under the Floods and Water Framework Directives - Finding synergies and addressing challenges” were introduced.)
The workshop, organised in December 2018 focused on existing hydromorphological modifications due to flood protection and restoration/mitigation measures to achieve the WFD’s objectives and it also dealt with planned new hydromorphological modifications for flood protection in the context of the WFD.
The workshop aimed to find answers and outline conclusions in relation to the following questions:
In relation to the planned new hydromorphological modifications for flood protection the following points were raised and discussed:
A background document has been prepared as an input for discussions at the Workshop. Chapter 5 of the document includes those conclusions, which were identified in the frame of the workshop's group-discussions. The document with conclusions can be downloaded from here.