]> 2026-04-12T11:21:57+00:00 Case study:Strategic redistribution of channel substrate 500 en Approved 0.5 - 2 m 5 - 10 m Long-reach excavator Creation of pools and riffles Environment Agency The Parks Trust Parks Trust No No Yes true Yes 52.0252121,-0.71365149999997 Rob Environment Agency Clapham Long-reach excavator, Creation of pools and riffles,,, ,,, Ongoing fish surveys are being undertaken at this location, as well as habitat assessment. 22012 The Parks Trust OU DND.jpg 2015-10-28Z 2457323.5 Complete This project was a follow-up from a previous project (Ouzel habitat improvements). Original project used large wooden deflectors in the channel to clean underlying gravels and kickstart natural process. However, the wood used was too small, and the channel over-large and -modified for the deflectors to be instigate significant change. This project used a long reach excavator to re-form the channel, creating a series of deeper pools and riffle sections, where previously, the channel was wide, shallow and uniform in both flow and bed morphology. There was evidence of water vole activity at this site, therefore banks were left untouched and the 'shoulder' or pinch-point' features were detached from the bank leaving a 30 cm 'gutter'. This prevented the possibility of any water voles becoming entombed in the bank. Following the work faggot bundles will be installed in these gutters to allow gradual build up of sediment an development of vegetation in the gaps. Strategic redistribution of channel substrate strategic redistribution of channel substrate Yes 150 River Ouzel (Open University) river ouzel (open university) Fisheries Habitat and biodiversity Hydromorphology Urban Less than 1 k€ Low Medium Calcareous GB105033037971 Ouzel US Caldecote Mill 2015-11-02T11:11:46Z 2457328.9665046 2016-12-20T12:16:52Z 2457743.011713 Strategic redistribution of channel substrate