Monday, December 18, 2017

Musings and Ousings Around York - Part Two

York floods 1982 - 2015

Flood heights near Ouse Bridge


Below: Flood heights at Ouse Bridge (gardens between Ouse Bridge and Skeldergate Bridge) – given in feet and inches. Most recent, and the highest 2000.









Date
Height / m
Height /ft
Comment
04/11/2000
5.4
17’8”

1636
5.3
17’ 6”

27/12/2015
5.2
17’1”

26/09/2012
5.07
16’8”

1831
5.08
16’8”

05/01/1982
5.05
16’7”

March 1947
4.99
16’ 4 ½ “

1763
4.94
16’ 2 ½ “

December 1978
4.85
15’ 11”

1892
4.77
15’8”

1991 (Feb?)
4.72
15’6”

1995 (Jan?)
4.70
15’5”


The floods of 2012 and 2015 have yet to be added to the Skeldergate gauge; and I didn’t notice them marked anywhere else either. Regardless or real estate value and the property market, they shouldn’t hide these things; though may be have information near the gauge / floodmark about flood defences reducing the risk.

The 1982 flood was the first one I remember hearing about clearly; as a 14 year old deeply into rivers. December had been cold with heavy falls of snow throughout Britain, which thawed rapidly as it turned mild and wet. Around new year, there was flooding on the River Severn. Then the highs shifted to Yorkshire; the Wharfe bursting its banks; Dad noting this having painted it in much more benign conditions at Bolton Abbey the summer before. In York there was widespread flooding around the city; and on the tidal Ouse at Cawood and Selby downstream. I recall hearing about it all on the BBC evening TV news; and on John Craven’s Newsround. Also stuck cuttings from The Guardian into my diary; one showing a bleak picture of the flooded Vale of York somewhere around Selby. All the bleaker as, though the weather was better back home, I was at the difficult age of 14; unhappy and anxious; spotty and overweight; I wanted friends at school but couldn’t find anyone on my wavelength; but realistically, my frequency was someway off the conventional spectrum expected at that age. The news reports of floods focused on Britain; but there was also widespread flooding in Europe (presumably through a similar combo or melting heavy snowfalls and heavy rain coinciding); including the Seine in Paris; and Vistula in Poland. The BBC News mentioned the latter, Poland being in the news anyway because of martial law being imposed by the communist block  General Yarozelski just before Xmas 1981.
I don’t know about Scotland, but I’m pretty sure January 1982 flooding episode in England & Wales where melting of heavy snowfall was a big factor. Since then all the major floods in England and Wales have been  pluvial (rainfall). Relatively mild winters (eg 2015/16, 2000/01). During the colder winters (early 1991, 2009/10, 2010/11) the snow has been less heavy, shorter lasting and thawed slowly. The last two cold spells were largely cold and dry.
The 1982 York flood prompted the building of flood defences later in the 1980s, including floodgates outside the row of houses alongside the river above Scarborugh railway bridge; the Clifton Ings floodwall / sluices; floodbank alongside playing field below Clifton Bridge; and the Foss Barrier.


Foss flood barrier, operating since 1988

1991 – January or February – the biggest flood in York since 1982; as far as I’m aware the flood defences coped and it was just mentioned in passing by The Guardian with a photo. The first I heard of it was there and not on TV / radio. This came during an otherwise prolonged relatively dry period; with a succession of drier than average winters straining groundwater and chalk streams in southern England.
November 2000 – the highest flood recorded here. On the night of the flood (3rd November), it was touch and go whether all the flood defences would hold in the rising water; predicted levels raised after further heavy rain on the Pennines. This was one of the notorious areas during a period of prolonged, repeated widespread flooding across the UK. For several months that autumn, one low pressure moved in after another; some of them slow moving, leading to heavy rainfall accumulations. The floody trouble began in southern England in October, affecting SE England, including Lewes on the Sussex Ouse. Then on the night of Sunday 29th October there was a storm and strong winds. We had a power cut lasting several hours in Church Crookham, Hampshire, the winds bringing down trees and branches over power lines. The power was restored in early hours of Monday; but several more shorter power cuts for about a year afterwards everytime the wind got up. However, we got off lightly; something which became clear the following day amid news reports of rivers rising across the country. Among the first to rise were the reactive Wealden (the Mole) and Pennine rivers; then the slower respoinding ones like the Severn. The Severn floods were among the worst since 1947 and strengthened calls for better flood defences along the middle Severn through Shropshire and Worcestershire. In the north, meanwhile, reporters in wellies in York. I thought I heard one BBC Radio 4 news report mentioning the Aire charging through Leeds with a flow in excess of 1000m3s-1. The Aire flows into the Ouse downstream, so it didn’t contribute to the flooding in York; but the Vale of York was badly affected for sometime afterwards. For the remainder of 2000, there were repeated flood warnings here; and there was a further (but lesser) flood in January 2001. The spring and summer of 2000 had been wet, too: the Ouse flooded in early June. The EA used that flood as a test of their revamped flood warning service, ie flood alert, flood warning, severe flood warning. News crues’ floody reports reminded me another visit to York and the Ouse was overdue. I made two trips there during the much calmer autumn and winter of 2001. The first one, in late September was solo; with a couple of nights at YHA York and a day looking round before an OU revision weekend at the University of York. During my wanderings, I some verse to the tune of The Grand Old Duke of York nursery rhyme flowed into mind. Verses added as more floods happened.

Oh the dark brown Ouse of York
In its 2000 flood
Rose over the top of the bank
And caked the place in mud
And when it was up it was up
And when it was down it was down
And when it was only half way up
It was neither up nor down.

Then at the beginning of December, a duo trip, again based at the YHA, arriving on Saturday 1st December to view Treske furnishings in Thirsk.  We also had a look round York and walked along the river. I remember particularly the Millennium Bridge and golden reflections of Ouse Bridge in bright winter sunshine. In complete contrast to the winter before, and no doubt a relief to people living and working in the area, it was a largely dry anticyclonic winter; though there was minor flooding in February 2002. It had also been a fine, bright autumn, with the autumn colours lingering into early December.

26th September 2012
Unusual timing: September is usually dry, the weather breaking much later in the autumn, if it’s going to. 2012, though had been a very unusual year: starting off dry with real worries about drought in large parts of England and Wales after two successive dry winters. Then, an about-turn in April with heavy rain from the middle month. The Severn and Ouse flooded during the last week. Even more unusually, the groundwater and southern chalk streams recharged; rain percolating through the soil when it would normally evaporate or be taken up by plants. The early summer was wet, too. A lull later in the summer; but then it all started up again in late September. There was so much rain over Yorkshire that the Ouse rose to its highest level since the 2000 flood; though as far as I know the flood defences held limiting property flooding. News of this flood (mainly online) incidentally, distracted me briefly from a renewed period of health-related preoccupation and anxieties post-ITP diagnosis. While walking along the Swale at Richmond the year before, I thought York was about due for another large flood; to which the Swale would surely contribute. Through my life, they’d tended to happen about every ten years; though purely a perception and not a fact. After this flood, then, I thought the Ouse had had its fill for a while. But I was wrong…

 Pages from my scrapbook, December 2015


Storm Eva December 2015 – Yet another when one rain-bearing low pressure after another rammed the country leading to widespread flooding. Two winters before, (2013/14) it had been the south and Midlands. Now it was the north’s turn; and the low pressures had names (adopted by the Met.Office from an alphabetical list of names chosen by the public). Most notoriously, Storm Desmond 5th/6th December causing unprecedented, devastating flooding throughout Cumbria and to a lesser degree the Pennines. Come Christmas, warnings of another low developing, this one called Eva, set to hit on Boxing Day. At first they thought Cumbria would spare the brunt yet again; but this time the biggest problems were in Yorkshire, including York. The Ouse exceeded its 2012 level, but was some way below that attained in 2000. However, the property flooding was widespread throughout the city. Much of it was due to the failure of the Foss flood barrier, or more precisely, the Environment Agency – after considerable and careful thought – lifted the barrier to prevent the control room flooding. Normally, when the barrier is closed, it prevents the rising River Ouse backing up the River Foss and flooding the centre of city; pumps, meanwhile discharging the flow from the Foss into the Ouse near the barrier. When we visited York at the beginning of December 2017, construction work was in progress by the barrier installing eight new higher capacity pumps and a new control room which is less likely to flood. There as also major flooding on the River Wharfe which joins the tidal Ouse at Cawood above Selby. At Tadcaster it took out (destroyed) a historic stone bridge, which didn’t reopen until more than a year later. At Flint Mill Weir, near Tadcaster, the CEH / NRFA say the peak flow was around 500m3s-1 for a catchment size of 758km2 and mean flow of around 18m3s-1


 Foss flood barrier construction work, December 2017


The Vale of York is very flat and was a lake during the last ice age;  the Ouse and Humber only appearing when the ice melted and the lake drained away. 
Finally the naming of rivers, the Ure-Ouse and Humber are one river; and one of the longest in England; though I guess you could take the Ure-Ouse to be a tributary of the Trent, meeting the Trent at Trent Falls. I don't know why names change along this river system and not others. Maybe it's the marked change in the character and landscape reflecting local Geology moving east from hilly limestone dales to the flat Vale of York, then wide estuary. One theory says the  Ure (Yore) and Ouse sound similar and have the same derivation, probably water as most British river names do. Others say it’s the Ouse Gill Beck, flowing in below the confluence of the Ure and Swale which usurps the title. Broadhead says the Ouse (this stream) was Born in a Workhouse.

Books and Websites
Books

Richard Bell – Yorkshire Rock – A Journey through Time, Earthwise (2006) – geology across Yorkshire, early Mesozoic era to Quartenary.

Ivan E. Broadhead - Portrait of the Yorkshire Ouse, Hale (1982) – bought secondhand in about 1983. Even after all this time, still a good read and appreciation of the river.

Websites

York Stories – Why does York flood?http://yorkstories.co.uk/why-does-york-flood/
Flood Heights on the Ouse | York Civic Trust

River Foss Barrier - Wikipedia

York's Foss flood barrier: New pump to be installed - BBC News