Location
Agriculture Science Theater, Oregon State University
Start Date
25-6-2013 3:10 PM
End Date
25-6-2013 3:30 PM
Description
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.
Concurrent Sessions D: Fish Passage at Tidal Barriers: Herman Wanningen and Greg Apke - Fish Friendly Tide Gate Management in the Netherlands, a Regional Perspective
Agriculture Science Theater, Oregon State University
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.
Comments
Peter Paul Schollema is a specialist Aquatic Ecology working for the Dutch Regional Water Authority Hunze en Aa’s. The last 12 years he has been working on a large number of river and lake restoration projects with a strong focus on planning, monitoring studies and implementation of measures in the Northeastern part of The Netherlands. During this period he worked on the realization of about 80 fish migration facilities ranging from small ramps in upper reaches to high tech fish passes at tidal barriers. He worked as editor and author on both projects; the European Guidance on fish migration From sea to source (2006) and the worldwide guidance From sea tosource, International guidance for the restoration of fish migration highways (2012).