Monday, September 22, 2014

Notes from the Mole, Wey and Thames - September 2014

15th - 17th September 2014

North Downs and River Mole - Monday 15th September

View from Denbies Vineyard towards Leith Hill
Walk from Dorking to Leatherhead via Denbies Vineyard, Ranmore Common, Norbury Park, Thorncroft, Leatherhead.

Fine, warm settled weather great for walkers and plein air painters, though it's been a long dry summer for rivers.

Dorking Deepdene. Arrived about half-ten. Across the A24 to the park and pond, then path across the A'road and railway into Denbies Vineyard. Vineyard extensive, extending out the west. Grapes ripening. 

Box Hill from Denbies Vineyard
Started off following tracks through vineyard west, but couldn't find a way up the hill (not PRW), anyway. Retraced steps north acrosd vineyard to NDW and followed that up the hill and round to the west at the edge of the woodland of Ranmore Common. Shade pleasant as it felt warm and sticky in the sun. Continued along NDW to St. Barnabas Church, Ranmore, spire seen further back.


Grapes ripening on the vines, Denbies

Took the bridleway opposite the church north across the Ranmore Common wood. Came out into the combe near Bagden Farm. Sign pointing left to youth hostel about 3/4 mile west at Tanner's Hatch.

St. Barnabas Church, Ranmore
Crossed Chapel Lane, continuing north through Chapel Wood, past Phoenice Farm behind hedge on left - guard dog warnings - into Bookham Wood and the march larger woodland area of Norbury Park. Lunch in the clearing a bit further up the hill from the crossroad of the main paths near the western end.

Following the paths down towards, Norbury House, passed the sawmill. A pair of sculpted tree stumps outside the gates. One had finger / toe like digits, a bit like the tree on the riverbank near Box Hill. The other looked like the head of a pig - or maybe a wild boar (or bore after my trip to the Severn last week). From another angle (like in the pic below) it could have been a fish.  Viewed facing, though, it looked more distressed and gargoyle like than it came across in my drawing.

Lunch stop in Norbury Park

Wood sculpture outside Norbury Park Sawmill
From there, I followed the road down the hill and joined a path off to the left which crossed the railway tunnel and came out of the woods at Icehouse Copse. Then took the path on the west under the A246. The graffiti art enhanced the otherwise barren, boring concrete, though the Flow River arrow in metal was pointing upstream rather than towards the Thames.

Graffiti gracing the Leatherhead bypass bridge

At Thorncroft House I turned right to the footbridge. Between there and the redbrick multi-arched town bridge, the river flowed between islets. Stopped to sketch at bench facing the flint stone bridge between two of these on the far side. A large oyster like shell over the archway. Then carried on crossing the road at Town Bridge, under the concrete B'road bridge and two viaducts into the open area of the Common Meadow.

The Mole near Norbury Park

Thorncroft bridge, Leatherhead
There were scenes around Leatherhead, I recognised from You Tube footage of last winter's flooding. such as the Thorncroft footbridge with the 10mph speed limit sign, where on Christmas Eve I wondered if the river was so fast and furious that it achieved that. Here, too, at the beginning of February, on the day I saw the double whammy fluvial-tidal spillages on the Arun, a lady videoed her trudge through the over flowing River Mole, probably ruining her walking boots.  A forgottten Deep Flood Water sign by a now dry ditch near leisure centre.

The Shell bridge

Leatherhead Town Bridge

Leatherhead Common Meadow

What a contrast with what I saw now:  River levels were very low throughout. I wasn't surprised: the Mole is like that.

A note on local geology and water levels

At Leatherhead, the Mole leaves the Chalk of the North Downs for the London Clay of the London Basin (BGS online geo maps).

Low water levels - Common Meadow,
There is a superficial cover of alluvium all along the floodplain. Beneath this at the southern railway viaduct - Lewes Chalk (later Cretaceous); Thanet Beds (Palaeogene) - sand and silt at the northern viaduct; and London Clay (Eocene) beneath the Common Meadow. If the low water level I saw today was due to alleged swallow holes in the Chalk, I'd have expected water levels through the Common Meadow to have been better than they were upstream. They weren't. Therefore, must be due to the currently very low rates of run-off in the catchment.

The Environment Agency A and CEH say rainfall in England and Wales was above the long term average throughout August, with soil moisture increasing, river and groundwater levels within the normal range for August. Rainfall was well above average over much of Scotland, with flooding in some areas, including the River Lossie near Elgin. EA flow gauge data this week (10th - 16th September) shows the Thames (Kingston) and groundwater dominated rivers such as chalk streams comfortably normal. However, this September so far has been very dry throughout the UK (data from the Met. Office, via this report). As of 16th September, overall rainfall across England has been just 15% of the long term average. In SE England, just 2mm of rain has fallen during the first half of September. The EA say most of their indicator rivers are still flowing within their normal range for the time of year, though rivers in northern and western England, in generally impermeable catchments are running a bit below normal.


On the Mole, things must be better than they were around this time in 1976: compare water levels beneath the A246 bridge today with the photo of from summer 1976 with the completely dry river bed, Surrey Weather Book (Currie et al, 1990) which I'm pretty sure was taken here.

Though we may not have had the hottest or driest of summers, I reckon the past six months have been particularly hard on the Mole and rivers in impermeable catchments generally, especially in SE England where rainfall is lower. Even in March, barely a month after the flooding, the CEH said that it was notably low. Spring was early, dry and very mild. Plants growth has been prolific throughout, sucking up moisture from the ground. Even with the wetter August, I noted from the EA's website that the Mole was below normal during the second half of the month. The soggy August Bank Holiday revived it briefly, though only briefly as it soon all ran away. See my musings along and near the Mole near Box Hill earlier this year:



Wey and Godalming Navigations, Guildford  - Tuesday 16th September

Water meadows - St.Catherine's
A late start before heading into Guildford on the train around midday. There, a leisurely walk along the Wey to Shalford, cuppa overlooking the river in Debenhams, then another stroll up to Dapdune Wharf and the Woodbridge Meadow tree / train sculptures. Didnt rush as, once early cloud / drizzle had cleared and sun came out, it felt warm and sticky. Still very much that into the evening.

Mooring by Shalford bridge

Along the Wey, I did a sketch of tree reflections on the bend near St. Catherines Lock. Enjoyed flowers growing in the meadow / more marshy land inside the bend.

Signs up at various intervals along the towpath with photographs 250 years of the Wey and Godalming Navigations thought it was 360 years last year, but never mind. Near St. Catherines Lock, a photo of the drownded lock and meadow at the height of the 1968 floods. That was the big exception the usual back-to-school-back to-better-weather / rivers low and tired after the summer rule. Took a photo now to show what it usually all looks like, looking upstream towards Godalming.

St. Catherine's Lock today

St.Catherine's Lock in aftermath of 1968 mega-sog



Reflections beneath railway bridge Id crossed on the way to Dorking yesterday. A temporary pontoon, scaffolding etc across the river, work being done on the pipe which crosses here.


Opposite Dapdune Wharf later a bit about the Wey barges, constructed here and launched here, from the side shed nearest the railway viaduct, side off the wall.

Relections at Dapdune Wharf
Further to yesterday, the Wey didnt look nearly as low as the Mole, though a lot lower than it did in the spring, particularly noticeable at Millmead. Think the canalisation of the river, with more ability to direct flows, must help. Along with perhaps a more permeable catchment, though by now the upper reaches of the North Branch in Farnham can look overgrown and anaemic.


Fish eat fish eat fish, Woodbridge Meadow

Tree creature and phone guy in Woodbridge Meadow

My blogs along the Wey 2013 - 2014


The Thames Barrier, Greenwich and the Tower of London - Wednesday 17th September



Arriving in London about 11:00am, I took a train from Waterloo East to Charlton and walked down to the Thames Barrier. It was still foggy and rather gloomy. After the highs on the Severn last week with the spring tides, the Thames was subdued on the neap. All a fitting vibe perhaps for my thoughts of the wider world situation. See above and hints scribbled beneath the water in my sketches, along with notes on flooding and the Barrier's role in protecting London, as witnessed last winter. Not that the is likely bothered about petty human affairs to do with referendums, being probably upwards of two million years old. Even so, I write this on the way home, the long way round from Victoria, just crossed Grosvenor railway bridge, view upriver to the Albert Bridge outline lit up against the fading evening twilight. I wondered to the longest river in England what we'd wake up to on Friday morning.


The sun partially broke through the fog from about early afternoon, shining some light on the Barrier and the river, though the persistence of the fog took the edge of the threatened heatwave. Essentially a re-run of late September 2011. The autumn and winter went on persistently dry threatening drought, numerous rivers dwidling visibly by the year's end. Hope no re-run of that, but the freebie paper I picked up on the train this morning speaks of a "blowtorch" heatwave, with temperatures as high as 27C tomorrow. Presume that's London and hope it's a bit cooler back home, though I get the impression it's foggier to the east. Come October, I could use a bit of autumn, with fresher weather to knuckle down. Don't know what the pollution levels were in London, today, but anywhere near busy roads, eg Tower Bridge early this evening, wasn't pleasant. As in the summer heatwave, the heat builds later in the day, too.

Sketched near play area and cafe in front of floodbank just below the most southerly gate of the Barrier (gate 9) and control tower. In due course, a party of school children turned up for a lunch stop and slide on the slide. The City of Westminster marine aggregate boat passed through the Barrier on the nearside. It had probably come from the works just upstream of the Barrier and Charlton. I had my sandwiches and did another sketch, this time looking between gates 7 and 8  towards the O2 arena (before then the Millennium Dome) and the multiplying Canary Wharf Towers.

Profile of the River Thames beneath the covered walkway near the Barrier
 I then went under the covered walkway marking the eastern end of the 184 mile Thames Path. On the concrete wall on my left, a profile of the River Thames from sea to source. At the eastern seaward end, a mark marking the high tides on 11th January 1993 (the higher one) and Christmas Eve 1988. Below these, near the base of the wall , a line marking the profile of the Thames with height in metres relative to Ordnance Datum, Newlyn, the line rising moving towards the source, most steeply nearer the source at Thames Head near Cricklade, Gloucestershire, about 105m AOD. Along the way, landmarks, major towns and cities such as Oxford, the inflows of tributaries, including the Wey, the Mole (aka Ember nearing Hampton Court), the Hogsmill, Cherwell etc.

From there, I followed the Thames Path and Jubilee Greenway around the Greenwich Peninsula, where the river loops round Blackwall Point, and the O2. on the far side of the Thames the outlet of Bow Creek, where the River Lee / Lea comes out. Went under the chutes / passed the gravelly stockpiles of the Angerstein and Murphy's aggregate works, later under the new chairlift / gondola ride passing high over the river - Emirites something or other. As with the O2, everything round here being named more by brand - usually foreign - than a landmark with any direct connection to the Thames or London. Seeing the chairlift, with it's relatively big ticket to ride, had this surreal idea of suited executives riding the chutes etc of the aggregate workings once they run out of aggregate to dredge out of the North Sea.

Around the O2 - seemingly more successful as a gig arena than its relatively short incarnation as the Millennium Dome through the year 2000. A Monty Python reunion and Kate Bush's first live stage gig for 35 years taking place here recently. Rounding Blackwall Point, a gathering of gulls and comorants on the sand accumulated on the inner bend. View across to the Isle of Dogs with the Canary Wharf Towers. The Blackwall Tunnel passes under the Thames here.

Towers of London
More or less right round the bend from the O2 to the old power station at Greenwich, a building site, with lots of new blocks going up, a luxury cruise ship stop in the making, preparation for a Tall Ships event somewhere here this year. All looked very corporate, big biz, like much of the rest of London's becoming. I sympathise with Scots not wanting be ruled by faraway London, but the dominance of the City, rich foreigners buying up the property pricing everyone else out is making many people living much closer to it feel cut off from the Capital. Building sites at least honoured the route of the Thames Path and cycleways, so I got round to Maritime Greenwich without any obstacles or detours. Another historic high tide mark, this one on a wall in by the Trinity Hospital, for the highest tide of the first half of the twentieth century. 

Approaching Maritime Greenwich

The Cutty Sark

The Cutty Sark
Busy around Greenwich, the National Maritime Museum and Cutty Sark. Didn't go up into the Park as time  was getting on. Had a cuppa in Costa and looked round the Cutty Sark area. Cutty Sark, where it always was, with the masts prominent from the river, the base of the hull now undercover, in the new museum. The restoration, of course, the subject of my father's paintings, wood engravings and the big five block linocut.

Left Greenwich via the subway under the Thames to Island Gardens - unlike the Tube / Docklands, refreshingly cool beneath the river. There, I took the Docklands light railway to Bank. Got a bit lost there trying to get out of the station. Inevitably for this time of a weekday (half-five ish), streets strewn with suits. Big crowds streaming across London Bridge. I crossed Tower Bridge, passing the Tower of London, the moat area in front of the outer walls strewn with poppies. The carpet of red growing August 4th - 11th November, remembering the fallen on the centenary of the start of WW1.





My blogs about the London Thames during 2014