Setting fallen or cutted trees with steel cable in river banks.
|WATER TOPIC||Quality of natural systems|
|KEYWORDS TYPE||Upgrading of ecological diversity|
|MARKET NEED TAILORED|
This methodology/technic will solve problems of lack of ecological diversity in plain rivers. It will help to avoid removal of fallen trees from rivers. Fallen or cutted trees will fill river pits.
Fallen trees in the river are fixed with cables and emerged parts cutted to minimize jams. These trees are located in or near pits along the shore. They bring to the fish fauna area caches, food and support to some species for reproduction. For some fish, it is a nesting support.
|STATE OF DEVELOPMENT|
Manies wired trees (more than 40) have been fixed in the Clain Sud watershed since 2007. It's time to export technology to other areas with plain rivers or with weak ecological diversity rivers.
|INNOVATIVE ASPECTS AND ADVANTAGES|
Simple technology at low cost. Ecological diversity will upgrade with this method.
|INTELLECTUAL/INDUSTRIAL PROPERTY RIGHTS|
Resolving local problems, river engineer in charge of the Clain want to make other diffusion levels of this technology by using Internet for example. No problems with intellectual or property rights.
This technology can be implemented in many regions of european countries with similar problems (lack of habitat diversity).
Plain and low diversity rivers managers across EU.
|Estimation of risks|
Investment in time (for technology installation). Technology limited to low diversity and plain rivers for the moment. Trees used must be hardwood and pemanently covered by water.
|EVALUATION OF RISKS FOR OUTPUT USERS|
Modification in the river dynamic must be checked. For that, no more than 1/3 of the river must be occupied by trees.
|ECONOMICAL RISKS||Low risks|
|TECHNICAL RISKS||Low risks|
|MARKET RISKS||No risks|
|SOCIAL RISKS||Residents must be convinced of the necessity of these actions|
|NEXT STEPS TO ACHIEVE THE STATUS 'READY TO USE'|
Dissemination through rivers managers structures (associations, federations,...). Communication must be upgraded.
|INVOLVEMENT OF THE OWNER FOR THE NEXT STEPS||Fully available for dissemination, awaiting feedbacks from future users in other situations.|
|TYPE OF PARTNER FOR THE NEXT DEVELOPMENTS||Open to other rivers syndicates, fishing federations, rivers management structures, national organizations in charge of rivers|
|TASKS TO BE PERFORMED|
Development of user's guide, post monitoring, implementation methods, recommendations, feedback observations.
To reach a "ready to use" level, agreement with national authorities in charge of rivers must be concluded.
|Estimation of ressources|
|RESOURCES FOR NEXT STEPS|
User's guide writing will need time and work, but clain watershed river engineer is available to do it. Also available for dissemination, communication,... Clain engineer will update local website before the end of the year to address new targets: everyone knowing few or nothing on the subject and specialists.
|FORESEEN COSTS FOR NEXT STEPS|
No foreseen costs.
|TECHNICAL CONTACT||Manuel Myrliaz|
|WATER RTOM CONTACT||OIEau|
|PROJECT NAME||Wired trees|
|PROJECT ACRONYM||Wired trees|
|PROJECT DESCRIPTION||Fallen trees in the river are fixed with cables and emerged parts cutted to minimize jams. These trees are located in or near pits along the shore. They bring to the fish fauna area caches, food and support to some species for reproduction. For some fish, it is a nesting support.|
|LEADER||Syndicat mixte du Clain Sud|
|TEAMS INVOLVED||Syndicat mixte du Clain Sud, Fédération départementale de pêche de la Vienne, ONEMA|
|FUNDING ORGANISATION||Agence de l'Eau Loire Bretagne, Conseil Général du Poitou, Syndicat mixte du Clain Sud|