Fast flowing river.

[russ]

Out of interest what is the effect to the river bed when the river is in flood and a high flow rate?
Could there be more shallows in areas I least expect?
Less debris as its all been washed away?

 

[sarabande]

in the main channels there will be scouring effects as sediment is disturbed and then transported downstream. This sediment is then deposited in places where the turbulence of the flow is reduced, e.g. on the inside of bends, in back eddies, behind sandbacks and rock formations, and where the river widens and flow is reduced.

The BBC has lots of good basic geography/hydrology.

http://www.bbc.co.uk/schools/gcsebitesize/geography/water_rivers/river_processes_rev1.shtml

 

[sturmvogel190a]

Leaving Benson lock going upstream on the inside of that bend and the entrance to T&K marina are just 2 places i would think would be a problem with silt build up after this amount of flooding Steve

 

[SnowCat]

.....and if not monitored regularly, the build-up in the slower and meandering stretches, will eventually form ox-bow lakes .......

 

[CJL]

.....and if not monitored regularly, the build-up in the slower and meandering stretches, will eventually form ox-bow lakes .......

Which perfectly natural!

Question is should we expect the Environment Agency to dredge it which is preservation and not natural OR let it be natural and silt up?? - DISCUSS

 

[dash300]

.....and if not monitored regularly, the build-up in the slower and meandering stretches, will eventually form ox-bow lakes .......

So you were listening in the Geography lesson.

 

[SnowCat]

Oh yes! Guess I liked Geography!

 

[Mirror Painter]

If this works it's a link to Google Earth showing a place on the river near to my mooring. You can zoom in and see the red buoy in the water. It is a fine example of how an ox-bow lake occurs.

https://maps.google.co.uk/maps?ll=51.681265,-1.6621476&z=19&t=h&hl=en-GB

 

[SnowCat]

Hey Moxon! That looks really good.

 

[Mirror Painter]

Hey Moxon! That looks really good.

It may keep the narrow boats out soon. ONLY joking!

 

[teddington_lock]

What lock is that ? Look at the shoal in the weir stream !!!!

 

[Mirror Painter]

What lock is that ? Look at the shoal in the weir stream !!!!

Buscot lock. Particularly pleasant lock keeper who has a Microplus and so appreciates the beauty of little Moxon.

 

[teddington_lock]

I appreciate the little Moxon too , I have a Quayline Q16 myself.

 

[bargeboater]

There is a new sand bank/island on the inside of the bend by .
Going down stream from Chertsey Bridge, past Chertsey Meads Marine and Bates you will find Dumpsey Stump cottage by the very tight right hand bend which then leads onto the Ryepeck moorings.
Along the outside of the bend is a public mooring which has been taken over by "long term visitors", these and the new sand bank reduces the width of the river significantly.
This build up of silt has happened before and the EA have in the past, marked the hazard with a red buoy. Until it is dredged it may return. My advice is, Do not be cut the corner...
BB