Adapting existing culverts for the use by terrestrial and aquatic fauna (VSS2003/603)
Overview
Background & policy context:
Culverts designed 20 years ago have often an inadequate conception in terms of potential use by fauna. They are often barriers to wildlife movement. The older generation of culverts shall be examined, their fauna compatibility assessed and the best and most cost-effective techniques to retrofit described.
Objectives:
The objective of the project is recording and analysis of current remediation techniques for water passages to remove potential obstacles to the aquatic and terrestrial fauna. Further aim of the project is to provide definition of the most efficient techniques and their evaluation in terms of the cost-benefit ratio. Finally the improvement proposals for existing and new proposals for remediation techniques will be created.
Methodology:
The work includes literature review, interviews with engineers and technical experts in the field of fauna, representative review of existing water passages on the (national) road network in Switzerland and the selection of representative sample examples. The derived recommendations will ensure, that the proposed solutions the water passages Fulfill its hydraulic engineering and faunas specific function, are technically feasible and financially viable engineering.
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