]> 2026-04-07T07:15:47+00:00 Case study:River Bure 500 en Approved Introducing large woody debris Improvement of natural flows Adding sinuosity Channel narrowing Channel naturalisation River Restoration Centre Great Britain National Trust No No Yes false Before 2 .JPG During 2 .JPG After 2 .JPG Upstream before.JPG Upstream during.JPG Upstream after.JPG P5150010.JPG Phase 1 site 2 before restoration (D.Brady, The National Trust) Phase 1 site 2 during restoration (D.Brady, The National Trust) Phase 1 site 2 after restoration (D.Brady, The National Trust) Phase 2 site 1 before restoration (D.Brady, The National Trust) Phase 2 site 1 during restoration (D.Brady, The National Trust) Phase 2 site 1 after restoration (D.Brady, The National Trust) example of naturally occurring LWD that would have previously been removed (D.Brady, The National Trust) No 52.824056987687,1.2064790725708 Murray River Restoration Centre Thompson No longer remove naturally occurring LWD Introducing large woody debris, Improvement of natural flows, Adding sinuosity,,,Channel narrowing, Channel naturalisation, ,No longer remove naturally occurring LWD,, 4928 River Bure - following restoration 2010-11-01Z 2455501.5 Restoration 03.JPG 2008-11-01Z 2454771.5 Complete The National Trust in conjunction with the Blickling fishing club undertook a two-phase restoration project (in 2008 and 2010) at the River Bure, Norfolk. This involved installation of Large Woody Debris (LWD) with the overall aim of improving in-channel and marginal habitats, by re-establishing natural river processes interrupted by past management activities. The stretch of the Bure flowing through the Blickling Estate had been severely over-widened due to historic dredging to increase channel and holding capacity for several mills in the area. Within the 7 km of river channel that border the Blickling Estate there are four mills and several bypassed meanders. Siltation added to the degraded state of the river, which was heavily wooded. Felling trees to create in-channel LWD was identified as a good way to increase habitat and restore natural processes to the Bure (historically fallen trees had been removed by the Environment Agency and local fishing club). (Introduction of naturally occurring LWD to encourage flow diversity and increase channel sinuosity). Riparian habitats were of high quality, comprising ancient woodland and alder and willow carr, therefore restoration works were restricted to options which would have a low impact on the site and surrounding habitats i.e. use of heavy machinery was not advised. Objectives were: - To improve river habitat by re-instating woody debris - To increase the stock of wild brown trout - To enhance biodiversity and conservation value of the reach The project was completed in two phases. Phase 1 work was completed in November 2008 over four weeks. There was no allocated budget for the project, so works had to be economical and non-technical as access to the site was limited. Much of the work was therefore based on intuition and what was deemed to be aesthetically “right” for the location. Trees were felled into the channel with some minor modifications made to their in-stream position to comply with EA by-laws and fishing requirements. Work was carried out by volunteers using chainsaws, a hand winch and plastic boat. This phase increased fish catch numbers (based on Blickling fishing club records). Phase 2 of the project was completed in November 2010, encompassing a baseline survey and monitoring. In this phase the introduction of LWD was more adventurous. Consequently, the results of phase 2 were even more dramatic than phase 1. Effects of restoration appeared to be proportional to the amount of LWD introduced into the river. The approach at both stages involved adhering to the following: -selection of trees which were already likely to fall into the channel -fell them so they remained attached to the root plate -allow branches to penetrate the river bed to secure the tree -only if necessary use a stake to prevent movement -modify the position if necessary to maintain other channel functions e.g. fishing points -felling more than one tree at each location allows a web of branches and twigs to form, diversifying habitats and anchoring the “structure” Since 2010 the river has continued to become more diverse in terms of the range of habitats. Sediment trapped by LWD has increase in channel and marginal vegetation. The redistribution of sediments has resulted in a naturally developing channel. Areas of faster flows have begun to clean gravels, with areas of reduced flow velocity causing deposition. The National Trust has identified an increasing enthusiasm for retaining naturally occurring LWD as part of sustainable river management and restoration since the completion of this project. In the local area request to remove LWD have reduced dramatically. The potential reduction in management costs is likely to encourage LWD to be retained in its natural position or slightly modified as opposed to removed. The River Restoration Centre would like to thank Dave Brady from The National Trust for providing the case study content and photographs. River Bure river bure No 300 Broadland Rivers Anglian Bure (Mid) bure (mid) Bure at Blickling Estate bure at blickling estate Brown trout 10 - 100 km² 56 Less than 100 m Bure (Mid) GB105034055660 Fisheries Habitat and biodiversity 6 1 - 10 k€ GB105034055660 Bure 2013-01-02T15:54:21Z 2456295.1627431 2018-11-05T13:06:05Z 2458428.0458912 River Bure 500 1 plainlist 5 [[Category:Case study]] [[Project title::!River Bure]] [[Subcatchment title::Bure (Mid)]] River Bure# QUERY8dfab382f087590e987fe3b6ffe3a88c