Dr Pete Stone (@sediment_mattrs) 's Twitter Profile
Dr Pete Stone

@sediment_mattrs

Passionate catchment & river sediment specialist. NFM, WWNP, floodplain restoration Connecting field to river. Current RSPB, @DWTWildRiver, Dorset Peat, NT

ID: 1885940102

linkhttps://bit.ly/2D4oDs9 calendar_today20-09-2013 09:16:31

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Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Out looking at a floodplain to see how to rehydrate the riverscape, came across this awesome tree fall....nearly even 3 way split...like to think something dramatic like a lightning strike caused it!

Out looking at a floodplain to see how to rehydrate the riverscape, came across this awesome tree fall....nearly even 3 way split...like to think something dramatic like a lightning strike caused it!
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Interestingly the Wild Woodbury riverscape is filling up the sponge/watertable - it bounces in places! Not just floodplain (surface) storage.

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Back for winter visit to a reconnected riverscape with realigned river set free to its natural floodplain. This isn't flooding. Watertable filling nicely, natural multi channel, also pref for a main thread. Connected to an ID'd natural fp-no need for a digger engineered surface!

Back for winter visit to a reconnected riverscape with realigned river set free to its natural floodplain. This isn't flooding. Watertable filling nicely, natural multi channel, also pref for a main thread. Connected to an ID'd natural fp-no need for a digger engineered surface!
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Not all riverscapes are floodplains. Been using the same approaches for "Stage 0" restoration for rehydrating mires where channels drain the watertable. amp-theguardian-com.cdn.ampproject.org/c/s/amp.thegua…

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

This is something I've only really observed in the last few years. Used to be understanding susp sediment was mostly about temporal like ca. 90% of load moves in 5% of time (around 20 days). Now spatial aspects just as important due to very local weather x.com/Sediment_Mattr…

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

NFM Evidence. ID a high risk single field with morphologically active runoff path in GIS. Install corner bund.  Level monitor. Bunded storage fills in 2-3 hours (= speed flow delivered d/s). Storage drains back in 12 plus hrs. Ca. 20m3 water slowed to downstream road flood spot.

NFM Evidence. ID a high risk single field with morphologically active runoff path in GIS. Install corner bund.  Level monitor. Bunded storage fills in 2-3 hours (= speed flow delivered d/s). Storage drains back in 12 plus hrs. Ca. 20m3 water slowed to downstream road flood spot.
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

As we head out of such a wet winter, it's encouraging to see the headwater storage created by informed identification of simple locations where water becomes detached from a natural path and allowing water to be unconstrained. Low cost to do in the scheme but effective.

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

So, floodplain reconnection (“stage 0”/bead style) is en vogue, but it’s not suitable everywhere. A big problem to address is channel incision as vertical detachment from a natural floodplain. Some recent success using woody debris to trap gravels and raise the river bed - 1yr in

So, floodplain reconnection (“stage 0”/bead style) is en vogue, but it’s not suitable everywhere. A big problem to address is channel incision as vertical detachment from a natural floodplain. Some recent success using woody debris to trap gravels and raise the river bed - 1yr in
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Closest I’ve got to an Oregon-like Stage 0! Low cost putting water back into disconnected natural floodplain. No digger grading just ID a detachment point, dam up the start of perched channel & set water free. Thanks Dorset Peat Partnership & RSK Hab Man for making my vision real

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

A quick 1-ish min guide to a simple Stage 0 (with pictures!). Done in a morning, 75m reconnected, cost-a bit of time. Unloved headwater wooded valley bottoms with single (incised) channels are big opportunity for quick wins; areas that can't be farmed. Lots in urban settings too.

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

When I was asked to restore hydrology at Wild Woodbury I focused solely on water & creating the “Stage 0”..blindly assumed (not my expertise!) habitat would respond. 2 winters in, Dorset Wildlife Trust find ecology, WQ & carbon responses changing ploughed fields. Sort the water first!

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

More on other leaky dam function than just holding water in channel. Used this one to cut (avulsion) new channel. Discarge (Q) = speed (v) by cross section area (a), increase width/area then you reduce speed for the same Q. Making space for water...at a push Stage 8 river form!

More on other leaky dam function than just holding water in channel. Used this one to cut (avulsion) new channel. Discarge (Q) = speed (v) by cross section area (a), increase width/area then you reduce speed for the same Q. Making space for water...at a push Stage 8 river form!
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

If you can’t wait & need to engineer the outcome, interested to see an approach to replicate a mature anastomosing system for floodplain reconnection rather than “tomato on the vine” single wiggle with side ponds (which doesn’t address incision/maintains a transfer environment)

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Out looking at a perched watercourse for possible reconnection to the valley floor... and nature beat me to it! Natural tree fall leaky dam pushes water where it should be. Will talk to land owner try to make this sealed for low flows and permanent. Natural process ALWAYS wins!

Out looking at a perched watercourse for possible reconnection to the valley floor... and nature beat me to it! Natural tree fall leaky dam pushes water where it should be. Will talk to land owner try to make this sealed for low flows and permanent.  Natural process ALWAYS wins!
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Update on my mission to map natural processes to drive actual NFM interventions. Moving from overview approaches to field reality...to selecting true locations for measures on the ground! Success in refining ID of active runoff paths & now drainage/ditches for real connectivity.

Update on my mission to map natural processes to drive actual NFM interventions. Moving from overview approaches to field reality...to selecting true locations for measures on the ground! Success in refining  ID of active runoff paths & now drainage/ditches for real connectivity.
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

The concept of restoring flow to "floodplains"....and fully as "Stage 0" applies to all valley bottoms including peat bogs. Just completed a re-joining of a perched drain back into its valley floor to rehydrate peatland. Hydrology's about topography not the channel!

The concept of restoring flow to "floodplains"....and fully as "Stage 0" applies to all valley bottoms including peat bogs. Just completed a re-joining of a perched drain back into its valley floor to rehydrate peatland. Hydrology's about topography not the channel!
Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Headwater channels aligned outside the valley floor are easy riverscape restorations. Refining an approach - ID opportunity... look for where nature directs flow.... define a natural floodplain... find the hot-spot of detachment... infill/divert/lower banks. Rehydration!

Dr Pete Stone (@sediment_mattrs) 's Twitter Profile Photo

Headwater riverscape creation "Stage 0" for only 5% the cost of larger schemes... but similar lengths of connectivity. 20 of these = more realistic for full landscape recovery? youtu.be/m8hSgPhTl5c?si…