Just a reminder about the ESB’s useful page of hydrometric information here.
As of yesterday morning (23 February 2020), the discharge through Parteen Villa Weir was 659 cubic metres per second [cumec]. That’s the total discharge from the Shannon, covering both what goes through Ardnacrusha and what goes down the original course of the river [which in summer gets 10 cumec].
Of that 659, Ardnacrusha was getting 381 cumec, which means that 278 was going down the river’s original course.
The ESB’s Shannon forecast says
It is expected that a discharge ranging between 315 [cumec] and 370 [cumec] will be necessary at Parteen Weir over the next 5 days based on current weather forecast.
Those figures are well below the current combined discharge of 659 and more rain is expected, so I presume that the forecast refers to discharge down the original course of the river, which is to increase by between 13% and 33%. Water levels below Parteen Villa Weir are already high, though not at 2009 levels, so an investment in wellies might be advisable.
Shannon floods 2009 here.
Here’s an old page of mine about why the Shannon floods. I’ve removed some links that no longer work. The link to the ESB’s infographic does still work.
Posted in Ashore, Drainage, Economic activities, Engineering and construction, Extant waterways, Modern matters, Operations, Shannon, Waterways management
Tagged cumec, ESB, flood, hydrometric, Shannon, water level
I want to see these 16 pinch points dealt with because in removing them we will drop the levels of the Shannon downstream of Athlone right down to where Deputy Harty lives. We are talking about dropping the level of the Shannon a foot and a half. The number of people who would benefit from this – the local farmer, the local business, BirdWatch Ireland – is enormous. The Government is committed to putting huge money into this.
Kevin Moran TD (Ind, Longford-Westmeath), minister for draining the Shannon, in a Dáil Topical Issue Debate on Flood Risk Management on 16 October 2019.
I wonder which level he’s talking about.
Posted in Drainage, Economic activities, Engineering and construction, Extant waterways, Ireland, Modern matters, Operations, People, Politics, Shannon
Tagged drain, flood, Shannon
According to the Indo, which may or may not know anything about the matter itself but probably got a press release from someone [to whom the same qualification may apply], farmers along the Shannon Callows are concerned about rising water levels at Clonown, an area on the west bank below Athlone.
The level in that area is held up by the weir at Meelick. But according to Waterways Ireland today,
[…] low water levels exist on the upstream approaches to Meelick and Victoria Lock. Water levels are currently below Summer levels.
According to the OPW gauges at Athlone, the water level is below the 50th percentile and is falling. The same applies at Banagher, although it did exceed the 50th percentile for some days.
Three lessons suggest themselves:
- farmers might need to get used to the idea that, when it rains, it gets wet — and that, if they choose to farm on a floodplain, their land might get wet too
- politicians might refrain from issuing nonsensical panic-laden press releases to gain free publicity [but I suppose that’s too much to ask for]
- journalists might like to check stuff for themselves instead of reprinting press releases unquestioningly [but that too is probably too much to ask for].
Posted in Ashore, Drainage, Economic activities, Engineering and construction, Extant waterways, Historical matters, Ireland, Modern matters, Operations, Shannon, Sources, waterways, Waterways management, Weather
Tagged flood, Shannon
Lough Allen to Sligo (OSI 25″ ~1900)
In looking at the map of Ireland, it has appeared to me that it may be found of advantage to prevent the waters of Lough Allen from flowing into the Shannon, and to cut a channel in a north-westerly direction, along which they may run into Sligo Bay. By this disposition of the waters of Lough Allen, not only will the channel of the Shannon be relieved from the superabundant water which now flows along during the rainy season, but they will act very beneficially in scouring out the harbour of Sligo. The Shannon might likewise be made available to the supply of power to several valuable mills to be erected on its course.
The Report of Mr George Stephenson, Civil Engineer, London, 9th July, 1831, to the Committee appointed to inquire into the practicability of improving the navigation of the Shannon, and for draining the lands in the vicinage
Posted in Drainage, Economic activities, Engineering and construction, Extant waterways, Historical matters, Ireland, People, Sea, Shannon, Unbuilt canals, waterways
Tagged bay, flood, George Stephenson, Lough Allen, mills, scour, Shannon, Sligo
It says here
Minister Naughten also announced that Meelick Weir just north of Lough Derg will be removed.
I can’t find anything about this on Mr Naughten’s department’s website and Boxer Moran’s speech doesn’t mention it.
Were it true, getting a boat upstream (or indeed down) past Shannon Grove would become even more exciting. Perhaps it’s time to restore Hamilton’s Lock.
Of course if the weir is removed there will be no point in restoring the walkway.
Posted in Ashore, Built heritage, Drainage, Economic activities, Engineering and construction, Extant waterways, Historical matters, Industrial heritage, Ireland, Modern matters, Operations, Politics, Shannon, Weather
Tagged flood, Hamilton's Lock, Meelick Lock, Meelick Weir, Shannon
Lewis Davis says:
Empirically, I find a robust negative correlation between rainfall variation, a measure of exogenous agricultural risk, and a measure of individual responsibility. Using rainfall variation as an instrument, I find that individual responsibility has a large positive effect on economic development.
Abstract on Tyler Cowen‘s site. You can rent the whole article for $6.
Posted in Ashore, Drainage, Economic activities, Engineering and construction, Extant waterways, Foreign parts, Ireland, Modern matters, People, Shannon, waterways, Weather
Tagged arterial drainage, collectivist, flood, rain, Shannon
To the Editor of the Athlone Times 24/8/1889
I understand that the Athlone Board of Guardians passed a resolution at a recent meeting in favour of the drainage of the Shannon. May I ask, is it the object of these enlightened gentlemen to destroy the navigation of 240 miles passing through our country, which no law can ever restore; or can it be possible they so far despair of the future traffic of the country under the management of their Parliament, in College Green, as to feel warranted in doing away with such a natural and beautiful highway for trade.
I happen, myself, to be in a position to judge the agricultural part of the question, and after the experience of 25 years of the lands which are subject to the Shannon flooding, I have no hesitation in saying that the meadows are greatly improved, and I may mention that in no way could these lands be more profitably farmed than by meadowing.
To the Athlone people, it seems to me a matter of the greatest importance, or do they realise that their beautiful river is about to be turned into a mere cesspool, their traffic to be left at the mercy of the railway companies, and their boating excursions on their fine lake to be made almost impossible, as this drainage will create such a current at the opening of the lake that it will require their strongest efforts to force a boat against it, and even after overcoming this difficulty, they would have little to look at but white shores and barren rocks.
I remain, Mr Editor, Faithfully yours… R D Levinge, Carnagh
Thanks to Vincent P Delany for this.
Posted in Ashore, Drainage, Economic activities, Engineering and construction, Extant waterways, Historical matters, Irish waterways general, Modern matters, Politics, Shannon, waterways, Waterways management, Weather
Tagged Athlone, drainage, flood, Shannon
I mentioned flooded fields, zoned for housing, here. Michael Geraghty has very kindly sent on this photo, taken recently in Athlone.
How nice to have a waterfront apartment. Though it may be a bit much to have it waterback, waterside, watertop and waterbottom as well.
If there is an award for sales skills amongst auctioneers, I wish to nominate Messrs DNG.
Posted in Ashore, Drainage, Economic activities, Engineering and construction, Extant waterways, Ireland, Modern matters, People, Shannon, waterways, Waterways management, Weather
Tagged apartment, Athlone, DNG, flood, fpp, waterfront
That’s Ballina, Co Tipperary, on the Shannon, opposite Killaloe.
From the railway footbridge
Photos taken on 1 January 2016.
The pontoon seems to be more severely affected than it was in the last big floods, on 22 November 2009.
From across the river
From the bridge
Posted in Ashore, Economic activities, Engineering and construction, Extant waterways, Industrial heritage, Ireland, Modern matters, Rail, Safety, Shannon, Tourism, waterways, Waterways management, Weather
Tagged Ballina, flood, footbridge, pontoon, railway, Shannon, Tipperary