How is flow estimated?

EA DAY'S LOCK Downstream graph -
EA DAY'S LOCK Upstream graph -


from Environment Agency Guide 2012-2013

1910: Days Lock in Thames Valley Villages by Charles G Harper

Right bank, length: 154', width 21'2"
CAMPING:   Day's Lock, Little Wittenham, Oxon, OX14 4RD. 01865 407768. Pitches  on lock island, Good Friday to 31st September.  WC, showers, shaver points. Walkers, Cyclists and boaters only.  No car parking.

Days Footbridge (Little Wittenham Bridge)

Below the lock and weir an island with a two part footbridge across it. Navigate RIGHT bank side. (ie keep right going upstream)

1859: The Thames, Mr & Mrs Hall

... the fine, woody hills beside Day's lock, where the river makes a circuit, passing, as usual, between low and luxuriant banks on either side, where the hay harvest is ever abundant, but where the husbandman will rarely look for any other crop, inasmuch as the land is covered with water in winter floods.

Before 1870: A timber swingbridge with a navigation opening of about 18 feet.
1868:  Sedgefield photograph of this timber bridge.
1870:  Iron bridge built
1880: Bridge at Little Wittenham, Henry Taunt -

Bridge at Little Wittenham, Henry Taunt, 1880
Bridge at Little Wittenham, Henry Taunt, 1880
© Oxfordshire County Council Photographic Archive;

Lantern Slide (1883-1908) - Day's Lock Footbridge
Pictures by W.C.Hughes. Thanks to Pat Furley, research by Dr Wilson.
This was described as "Days Lock Windsor - footbridge over"

1983-:  The Pooh Sticks Championships (for the RNLI Royal National lifeboat Institute) is held annually in March

1999:

Days Footbridge 1999
Day's Footbridge, in 1999.

1530:  Leland: "Dorchester Ferry at high watars over the Tames"
1580-5:  a flashlock and weir in Dorchester (maybe this means on the Thame?)
1580-5: a weir at Little Wittenham kept by William Dunshe.

1580-5: a weir at Long Wittenham belonging to Wyddowe Sawyer.
1788:  Days poundlock was built.
1802:  Mylne refers to the Lock as "Dorchester Lock"

In the cut below the lock there were three Thames & Severn barge-boats aground for want of water to get into it.  Caused by a flash at Benson below.

[ i.e. The weir at Benson had been opened causing the water level to drop downstream of Days. ]

1865:  Conservancy Report

Days Lock in utter ruin:  how it holds together I do not know.  One of the gates is chained up;  the weir is also out of repair, and in a very dangerous condition indeed;  any flood breaking down one of these upper places may destroy the whole navigation.

1871:  Lock rebuilt.
1873: Taunt's Map and Guide to the Thames -

The view of the river at Day's Lock, in combination with the hills in the background, forms one of those characteristic "bits" of river scenery that our landscape painters love.
The view from the hill is very fine, and the remains of the earthwork fortification round the second hill (consisting of a perfect ditch, &c.), said to be Roman, are interesting.

1885: Days Lock rebuilding, Henry Taunt -

Days Lock rebuilding, Henry Taunt, 1885
Days Lock rebuilding, Henry Taunt, 1885
© Oxfordshire County Council Photographic Archive; HT3907

2005:  Doug Myers, Little Wittenham Bridge, from the top of Harp Hill -

Little Wittenham Bridge, Doug Myers © 2005
Little Wittenham Bridge, Doug Myers © 2005

Northmoor Trust

1885:  The Royal River -

Sinodun Hill and Day’s Lock, The Royal River, 1885
Sinodun Hill and Day’s Lock, The Royal River, 1885.

1904: Days Lock, Dredge -

Days Lock, Dredge, 1904
Days Lock, Dredge, 1904
© Oxfordshire County Council Photographic Archive; D250357a

1906:  Days Lock, Mortimer Mempes –

Days Lock, Mortimer Menpes, 1906
Days Lock, Mortimer Menpes, 1906.

1923:  Days Lock house built.
1925:  Days Lock rebuilt.

1999:

Days Lock, 1999
Days Lock, 1999.