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Concurrent Sessions D: Fish Passage at Tidal Barriers: Herman Wanningen and Greg Apke - Fish Friendly Tide Gate Management in the Netherlands, a Regional Perspective

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Abstract
Regional Water Authority Hunze en Aa’sis one of the 25 regional water management organizations in The Netherlands and is positioned in the NE corner of the country. The main responsibilities are water level management, flood defense and water quality management in the regional lakes, canals and river systems. As part of the water management tasks, RWA Hunze en Aa’s operates several tidal gates that discharge water from the regional rivers into the estuary of the River Ems. These gates play an important role as access to the hinterland for several diadromous species like smelt, Atlantic eel, three spined stickleback, flounder and river lamprey. In the past these tidal gates showed to be an almost impassable barrier for these species. Since 2001 several projects have been carried out to adjust the management and make it more fish friendly. The presentation will give an impression about the practical discussions (salinity, sediment, safety) and monitoring results for 3 of these tidal gates.
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2013-06-25
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