Thames River Conditions 2014

[boatone]

After heavy rain overnight the Maidenhead flow, having dropped to 155 yesterday has risen to 177 this morning. No new river issues reported but heavy flooding in Surrey and Sussex has closed the A23 and the London to Brighton rail line.

 

[Chris_d]

Levels in the Abingdon and Oxford area have stopped falling after yesterdays rain and levelled out at 0.69m above normal at my Days lock reference, doesn't look good if we get more rain over the weekend it will be back up again.

 

[byron]

My levels here at Ashmount seem to have stabilised with a huge amount of standing water. The river front is just accessible but squelchy in the extreme.

 

[teddington_lock]

373 today

 

[teddington_lock]

415 cumecs at teddington at the moment

 

[Actionmat]

Does a high number of cumecs indicate a high level or just speed?

 

[teddington_lock]

Generally , the flow speeds up , the more water goes through the weir.

 

[teddington_lock]

301 today ( midnight )

 

[teddington_lock]

375 @ 2000 hrs and rising

 

[teddington_lock]

380 @ 2000 hrs

 

[teddington_lock]

360 cumecs @ 0800

 

[SnowCat]

Just curious, is that On the Tidal or Non-Tidal Reach? Is there a difference in the flow rates in the two? Many thanks, Tedders.

 

[teddington_lock]

It's measured at our weir. It's the quantity of water that is flowing through the weir.

 

[534l4rk]

Many Thames areas now on E.A. flood warnings for levels to reach or exceed 2003 levels with forecast rain thru' weekend and early next week

 

[teddington_lock]

411 cumecs at Tedders and rising

 

[boatone]

Maidenhead flow rate is up to 202.5 m3/s this morning from 178 m3/s yesterday. Rate is about the same now as it was on 10/11 January.

 

[Flynnbarr]

Maidenhead flow rate is up to 202.5 m3/s this morning from 178 m3/s yesterday. Rate is about the same now as it was on 10/11 January.

The rate can't actually mean much then
We have ALOT more here than the 10/11 jan

 

[SnowCat]

Kingston's flow now at 505 cumecs. Is this a record?

 

[Moonshining]

Kingston's flow now at 505 cumecs. Is this a record?

Not according to this site:

http://www.ceh.ac.uk/data/nrfa/data/time_series.html?39001

There are 33 dates with flow rates greater than 505 cumecs since 1883.

15/03/1947 506
1883-02-16 507
11/12/1929 509
15/02/1904 510
04/01/1925 514
14/12/1929 518
22/11/1974 521
07/01/1928 522
07/01/1915 525
16/03/1947 526
21/02/1900 527
08/01/1915 527
12/12/1929 527
04/01/1915 529
23/11/1974 531
09/01/1915 536
1894-11-16 540
13/12/1929 547
1894-11-20 552
06/01/1915 558
24/03/1947 563
05/01/1915 581
17/09/1968 581
23/03/1947 631
17/03/1947 662
22/03/1947 667
1894-11-17 673
18/03/1947 685
19/03/1947 688
21/03/1947 688
1894-11-19 700
20/03/1947 709
1894-11-18 800

Having said that, apart from a few exceptional days in 1894 and 1947, it's right up there with the big ones.

Does rather give the lie to those who are moaning about lack of dredging in the Thames. It's carrying historically high levels of water away at the moment.

 

[teddington_lock]

Interesting that !

I wonder how accurate those figures are. The flow nowadays is measured by ultrasonic beam , in the old days it was done on the old gauging weir alongside the Lensbury club.

The weir had a very sharp crest and a depth indicator , so they knew the speed of flow , depth and just extrapolated it over I guess. Although , as we know , the centre of the river runs much quicker than the side ( where the gauging weir was ) and also , the water that went over the gauging weir ( it was like a deep overspill ) didn't go right to the bottom of the river , where pressure is higher.

Having said that , at 800 cumecs , even if they are out by 20% , that's a lot of water , more than now !

Remember the weir has been enlarged and capacity increased a few times since then too !