Thames Anglers' Conservancy Members Forum
TAC Members-Only Forum
If you have arrived here and not yet signed up as a member, then please first join at using your real name.

Forum Membership is with Real Names only.
Please create a Username that is your First Name and Surname eg. "Joe Bloggs"
(This will save our Admin team the need to contact you about changing it)

Thames Anglers' Conservancy Members Forum
HomeHome  TAC Home PageTAC Home Page  SearchSearch  FAQFAQ  RegisterRegister  Log in  

Display results as :
Rechercher Advanced Search
Latest topics
» "Citizen Crane" project - sampling dates
Mon Sep 17, 2018 1:16 pm by Ed Randall

» Citizen Crane Forum ~ 26th October 2018
Sat Aug 25, 2018 7:41 pm by Ed Randall

» Invitation to the 2018 Eel forum ~ 15th October
Sat Aug 25, 2018 7:38 pm by Ed Randall

» Mystery of dead eels found in rivers
Sat Aug 25, 2018 6:43 pm by Ed Randall

» Eel Trap Clean Up/ training 5th May 2018 10am
Sat Aug 25, 2018 6:40 pm by Ed Randall

» A new address for 2017 ~
Sun Aug 19, 2018 12:48 pm by Admin

» Hampton Riviera removed
Thu Aug 16, 2018 10:41 pm by Ed Randall

» Roads closed everywhere ~ July 29th/30th ~ bike race
Mon Aug 06, 2018 10:14 am by John LeSurf

» *Thames Tunnel (Tideway Tunnel)*
Wed Jul 18, 2018 9:56 am by John LeSurf

» new hotel at hampton court means loss of fishing
Wed Jul 04, 2018 1:26 pm by Ed Randall

» FORCE clean-up in Donkey Wood ~ Sun 13th May 2018
Thu May 17, 2018 10:16 am by JeffHowe

Thu Apr 05, 2018 2:23 pm by John LeSurf

» penton hook tidy up.
Wed Mar 07, 2018 7:05 am by John LeSurf

» Riverfly & Clean-up Donkey Woods Saturday 18th Nov 2017
Sat Dec 23, 2017 1:02 pm by Ed Randall

» Biggest fish of all book
Fri Dec 22, 2017 5:43 pm by Adrian Hoare

» Wandle Trust - eel pass installation - call for volunteers
Thu Dec 07, 2017 8:53 am by Ed Randall

» Outfall Safari across London - call for Volunteers!
Thu Dec 07, 2017 8:47 am by Ed Randall

» Fishing the Thames at Medley
Thu Nov 02, 2017 2:33 pm by Trevor Rowe

» Thames Semi-Tidal Draw Off 2017
Fri Oct 20, 2017 9:08 pm by Ed Randall

» Eel Trap Results 2017
Tue Oct 17, 2017 6:07 pm by patrick barker

» Fish-swallowing Angler "lucky to be alive"
Sat Oct 14, 2017 8:01 am by Ed Randall

» River Mole polluted at Horley
Fri Oct 13, 2017 8:52 am by Ed Randall

» Petition to stop the export of elvers
Thu Sep 21, 2017 2:16 pm by Ed Randall

» Riverfly Training ~ Hogsmill ~ 30th Sept 2017
Sat Sep 16, 2017 6:56 am by Ed Randall

» Monster fatberg in Whitechapel
Tue Sep 12, 2017 1:40 pm by Ed Randall

» Radio 4 ~ Macquarie: The Tale of the River Bank
Tue Sep 12, 2017 12:28 pm by Ed Randall

» Thames TideFest 10th September 2017
Tue Sep 12, 2017 9:00 am by John LeSurf

» Invitation to the 2017 Eel Forum ~ 17th October
Sat Sep 09, 2017 8:32 am by Ed Randall

» Do you recognise any of these men?
Sat Aug 19, 2017 8:44 pm by Ed Randall

» Better access to free Thames fishing in Reading
Fri Jun 16, 2017 10:08 am by Ed Randall

Angling Data View
River Levels
UK Map

Thames Tides

Share | 

 West Thames Area Water Report March 2012

Go down 

Posts : 490
Join date : 2009-12-27

PostSubject: West Thames Area Water Report March 2012   Sat Apr 14, 2012 4:10 pm

Summary – March 2012
Across Thames West area there was only 38% of the March long term average (LTA) rainfall
and only 17% of the March LTA of effective rainfall. Most of our key river sites were
exceptionally low for the time of year and all but one of our key groundwater monitoring sites
had lower than normal groundwater levels at the end of the month.

March was another dry month with 38% of the LTA monthly rainfall for Thames West area. The majority of
this rainfall occurred in the first week of March. Most areas saw some rainfall in the middle of the month
but the last two weeks of the month were dry. Rainfall was greatest in the Chilterns West which had 51%
of its March LTA rainfall. All of the other West Thames areas had less than half the normal March rainfall
with the Wey catchment having the least with only 29 % of its March LTA.
The 2011- 2012 winter period, from October to March, was the 5th driest winter period in the West Thames
since our rainfall records began in 1920. In total West Thames had only 63% of the usual winter rainfall,
making this the second consecutive winter with below average rainfall. The 18 months since October 2010
have been the 2nd driest corresponding period for West Thames Area, only 1921-22 was drier. The south
east of England remains in drought status.

Soil Moisture Deficit (SMD) /Recharge
SMDs were higher than normal in all West Thames catchments at the end of the March with the greatest
being in the Ock, Thame and Berkshire Downs. The soil moisture model indicates that SMDs did not
return to zero (as usual) this winter in these catchments, as well as in the West Chilterns.
There was limited effective rainfall in March across much of the West Thames this month. The Cherwell
had the most effective rainfall but this was significantly less than we would normally expect at this time of
year with only 36% of the March LTA. In the Ock and Thame catchments there was no effective rainfall at
all in March. The overall effective rainfall for the area was just 16% of the normal March amount.
Over the 2011-2012 winter period effective rainfall was 17 % of the LTA. All catchments had a third or less
of the effective rainfall that we would normally have over this period. Effective rainfall was highest in the
North Downs (Hampshire) with 33%, followed by the Wey (Greensand) with 32% and the West Cotswolds
with only 30% of the winter LTA. The Upper Thames only had 7% of the normal winter effective rainfall
and the Ock and Thame had no effective rainfall at all.

River Flows
Monthly mean river flows in March were exceptionally low at all but three of our indicator sites. Only the
River Wye at Bourne End and the River Wey measured at Weybridge and Tilford had month mean flows
that were notably low as opposed to exceptionally low. The River Thames at Windsor and the River
Thame at Wheatley both recorded their lowest March mean flows, whilst the Rivers Coln and Cherwell
had their lowest March flows since 1976 which is the lowest March flow for these sites. The River Ock
also had its second from lowest March mean flow this year since the gauging station opened in 1979. The
driest March in the Ock record was in the low flow winter of 1992.

Groundwater Levels
Groundwater levels at most sites have changed very little over the past month. Only in the Oolites have
levels changed very much since February. In the Great and Inferior Oolites of the West Cotswolds and
Upper Thames groundwater levels continued to decline following limited recharge over the winter period.
At Fringford OBH levels did rise in March although they remained exceptionally low for the time of year.

Environmental Impact
There were 25 flow constraints on abstraction licences in force at the end of March.
Back to top Go down
West Thames Area Water Report March 2012
Back to top 
Page 1 of 1
 Similar topics
» Big Medium Room for Rent, Available MARCH 2012 (urgent)
» West Liberty Kentucky Tornados March 2012!
» Flagstaff Hill ENTRY LIST - Sat 3rd March 2012
» Sydney Track Classic ENTRY LIST - Sat March 19th

Permissions in this forum:You cannot reply to topics in this forum
Thames Anglers' Conservancy Members Forum :: Open Section :: News Board :: Environment Agency-
Jump to: