Posted on September 12, 2011
Posted on August 10, 2011
Balsam Removal at Winn Gardens: Before
The same mid-stream island after Balsam removal
SPRITE has also purchased some “stem injection” kit for controlling Japanese knotweed infestations and we are in the process of obtaining the appropriate licence to use glyphosate weedkiller next to watercourses. The huge advantage of stem injection is the specific targeting of individual invasive plants– and a lack of overspray of weedkiller onto non-target native plants and the adjacent river. For a great...
Posted on June 20, 2011
Posted on April 01, 2011
Great news once again from the Wandle. The E.A. have played a blinder and installed the fish pass that will give upstream access to the habitat enhancement scheme (see the next post but one below) above this previously impassable barrier. Now all that remains to put the cherry on this is to tackle a second barrier (by partial removal rather than by fish pass) and to get the "tweaks" right on the habitat works.
That just leaves the permissions to be obtained for phased re-introductions of wild trout parr in order to re-establish the self sustaining trout stocks of the Wandle (previous most recent record circa 1930). Can't wait. Well done to all involved (including us at the Wild Trout Trust :):)), at the E.A. and the Wandle Trust for the works on this partnership project.
Posted on March 25, 2011
Posted on March 08, 2011
Friday February 25th through to Monday the 28th saw a massive payoff for over 2 years' worth of planning, design proposals, negotiation and persistance (not only on my part, but on the part of the Wandle Trust - in particular Bella Davies and Theo Pike). Members of the local E.A. fisheries team (including Tanya Houston) also pushed forward the important removal of several barriers to trout migration - which will soon see a fish pass added to a large weir to complement the lowering/removal of 3 other weirs. Finally, we had the go ahead to begin the creation of good quality spawning, juvenile and adult trout habitat patches in the upper reaches of the Carshalton arm of the River Wandle: the next step in returning truly wild self-sustaining trout populations since their demise in the polluted waters of the 1930s.
Whilst seeking to arrange this year's "Trout in the Town Urban River Champion's Conclave", the thought occurred that it would be incredibly fitting to share the groundbreaking Wandle works with the dedicated members of "Trout in the Town" branches from urban rivers across the UK. So began the plan to arrange a two-day conference and...
Posted on January 21, 2011
Everything you need to run these projects in your local schools and community groups should be found in the pages at Mayfly in the classroom
Posted on December 20, 2010
The guidelines are available for free download in low resolution here:
URBAN RIVER RESTORATION GUIDELINES
Here is the report on the first two years of the project including progress against objectives as well as lessons learnt:
They will shortly be available to purchase at full resolution on CD from the online shop at THE WILD TROUT TRUST
Posted on December 06, 2010
SPRITE facebook group
Posted on November 23, 2010
A little London Chalkstream near Sidcup which has been diligently looked after in recent years by Thames21's Ashe Hurst got another shot in the arm on Thursday and Friday last week. Two of the WTT's conservation officers (Andy Thomas and Paul Gaskell) did two days of specific habitat improvement works in order to train the Thames21 staff and volunteers (including local youngsters who have been excluded from schools). A variety of uses of woody debris, brash bundles, wire, stakes and metal pin fixings were used to promote localised scouring of the stream bed, sorting and cleaning of spawning gravels and submerged "brashy" cover for juvenile fish.
The videos below show the increase in flow and change from "concreted" immobile gravels (with dark algal growth) to mobile and silt free (light coloured)particles at the pinch point created by an upstream "V" flow deflector
The flows prior to the installation of the upstream V were much more sluggish and favoured the deposition of silt. Now there is much more variety in current pace and depth.
The upstream V featured in the video clips (above)showing the focussed flow and pale gravel displaced following loosening with...
Posted on November 09, 2010
In summary - don't trim/remove debris that produces localised gravel scour:
This trailing branch debris is cleaning and "sorting" gravel for spawning - note the brighter patch of gravel
and don't tread on redds (trout "nests") containing eggs:
Newly formed redd which will allow eggs to hatch and emerging tiny fish (alevins) to shelter in the gaps between the pebbles below the surface of the gravel bed
Trout cutting a redd - photo Peter Henriksson
Posted on October 22, 2010
SPRITE came runners up in the 2010 Sheffield Telegraph community environmental project awards this week.
This is great recognition for all the hard work done both on the conservation of the river but also for the invaluable community engagement and education that everone involved has put into the city of Sheffield.
Very well done also to this year's Winners - Wisewood School.
Posted on October 18, 2010
Fish On DVD
Posted on September 13, 2010
Please see the photos and text on the link (below) that shows what we have been up to all last week on New Mills' River Goyt near Stockport:
River Goyt PV
Posted on August 20, 2010
Very hot news just in is that after many months (years!) of assessment, planning, design, negotiation and hard work; permission has just been granted for my design of habitat restoration and enhancement works to go ahead on the upper Carshalton arm of the Wandle.
Many thanks to Bella from the Wandle Trust hosting our E.A. flood risk assessor and putting our case so well and also great effort from Tanya in E.A. fisheries for making the weir removal programme happen.
An extensive array of structures will be installed over around 600 m of river which will create high quality spawning and adult holding habitat along with some additional juvenile habitat to complement the existing opportunities for young trout. When this is coupled with the increased connectivity along this section of the Wandle (through a combination of weir removals and fish pass installation), then the potential for robust self-sustaining populations of wild trout will be greatly increased.
The final piece of this part of the puzzle will come with the hoped-for opportunity to import wild trout parr from nearby in the catchment. Rather than depleting adult brood stock from the donor site - juveniles...