]> 2026-04-25T16:47:26+00:00 Case study:Refilling the meanders of the Colostre 500 en Rex r7 colostre vbatGB.pdf Case study description by ONEMA (French National Agency for Water and Aquatic Environments). Approved 1.0E-5 4 2 - 5 m 0.016426725 Weir removal Yes Yes Improvement Fish: Species composition,Yes,Yes,,Yes,,Improvement Macrophytes & phytobenthos: Taxonomic composition,,Yes,,,,Improvement Fish: Species composition Macrophytes & phytobenthos: Taxonomic composition Yes Removal of poplars in old meanders Re-meandering FDPPMA Alpes-de-Haute-Provence Alps Water Agency Regional Council Dèpartment-level Council Higher Fishing Council Local fishing associations No No Yes true 1.Image2 .jpg 3.Image1 0.jpg The Colostre canalised before restoration (1999). One of the Colostre meanders (2009). Conseil Supérior de la Pêche-Departmental Brigade Conseil Général (Départment Level Council) 43.7997869,6.041144 Vincent FDPPMA Alpes-de-Haute-Provence Duru 0.67 Weir removal,,Removal of poplars in old meanders,Re-meandering ,,Agreement with the owners,Public meeting,River contract Conseil Supérior de la Pêche-Departmental Brigade Yes Improvement Presence of beavers,,Yes,,,,Improvement Presence of beavers 696 Conseil Général (Départment Level Council) 1996-01-01Z 2450083.5 Complete The Colostre, a tributary of the River Verdon, is a typically Mediterranean river, with very low water levels upstream of Riez and flash flooding due to storms. The Colostre constitutes one of the only breeding grounds for brown trout. The beaver has also been recorded in this area. In the 1960s, following exceptional summer flooding, hydraulic improvements were made in order to modify the longitudinal profile of the river (resizing, straightening of the river and creation of weirs). These developments degraded the habitats of the river and caused significant erosion of the river banks. In response to this situation, in 1996, state fishing institutes and the local fishing association, initiated a protection Plan with the aim of free movement of salmonids and rediversification of habitats. The restoration measures formed part of the implementation of this plan. Thirteen meanders were restored. The disconnected meanders had not been filled in and instead had been left uncultivated; most of them thus remained identifiable. The first stage consisted of restoring access to the meanders by removing the poplars planted during the resizing of the river. Next, the current was diverted towards the old meanders which remained visible. The entrance to the straight channel was blocked using a submersible weir (consisted of timber billets covered with gravels, geotextile and protective mesh). The downstream part of the straight section was not closed off in order to allow for the dispersal of floodwaters. In areas in which the meanders were not identified, various experimental habitat diversification developments were carried out and weirs were removed or modified. Refilling the meanders of the Colostre refilling the meanders of the colostre 11000 Rhône-Mediterranean Alpes-de-Haute-Provence Colostre colostre EU - Special Protected Area Regional Natural Park of Verdon regional natural park of verdon Agreement with the owners Public meeting 215 100 - 1000 km² Colostre 66 50 - 100 k€ FRDR251 River contract 66 50 - 100 k€ Conseil Supérior de la Pêche-Departmental Brigade 2001-01-01Z 2451910.5 1999-01-01Z 2451179.5 2012-07-31T17:31:50Z 2456140.2304398 2017-06-05T14:43:35Z 2457910.1135995 Refilling the meanders of the Colostre 500 1 plainlist 5 [[Category:Case study]] [[Project title::!Refilling the meanders of the Colostre]] [[Subcatchment title::Colostre]] Refilling the meanders of the Colostre# QUERYc38a8d95e3244671b7957153d1dc0f95 Case study:Refilling the meanders of Colostre 500 en Refilling the meanders of Colostre REDI 102 en REDI