Category: Flooding

  • Supporting the vulnerable: Challenge 2050

    This blog post was written for Cymorth Cymru by David Clubb, ahead of him holding a presentation and workshop on climate change at their annual conference on March 26, 2020.

    How about this for irony; those who have contributed least to climate change, stand to suffer the greatest (1). This is as true globally as it is in Wales. 

    The countries which prop up the global per-capita greenhouse gas emissions table (2) include the Democratic Republic of Congo, Chad, Burundi, Uganda and Somalia. Africa is notable for its exceedingly modest contribution to human-induced climate change, yet stands to suffer greatly from changing weather patterns (3), not least increased average temperatures and changes in precipitation which will increase the challenge of desertification across much of the equatorial region.

    As globally, so in the UK. The lowest decile of income produces ⅓ of the greenhouse gas emissions of the top decile (4). Yet those with the lowest incomes typically have much lower resilience to events  which will be far more likely to occur as a result of climate change, such as flooding, wildfires and heatwaves.

    So when it comes to mitigating climate change, I refuse to point the finger at those who have done least to cause the problem. Yes, everyone can, and should, play a part in minimising their own carbon impacts. But the heaviest burden should fall on those with the greatest capacity to bear the cost – and on those who have contributed the greatest to the UK’s carbon emissions.

    Instead, the focus for those of us with personal and professional interests in supporting the most vulnerable in our society should be on how we can adapt our services in order that we are as well equipped as possible to respond to the inevitable challenges and crises that will arise more frequently in a future defined by a breakdown in climate as we have been privileged to know it.

    The Future Generations Act (5) provides us with a useful framework to consider our operations, with both the Well-being Goals and Ways of Working (6) requiring us to take different decisions and produce improved outcomes as a consequence.

    To take one example, the ways of working require a long-term, preventative approach. If we combine that approach with the Goals of prosperity and resilience, we can see that they mandate a careful assessment of the risk of flooding to property and other assets over a long period of time – say 2050. With coastal flooding risk increasing significantly (7), it would seem prudent for those providing services to the vulnerable to assess which of their assets will be in an annual flood risk area by 2050, and to make enquiries to Natural Resources Wales, the local authorities and to Welsh Government about any planned improvements to coastal flood defences.

    Such service providers would almost certainly benefit from also undertaking an assessment of fluvial and surface water flood risk – activity thrown into sharp relief from the recent devastating floods in the valleys, and more widely across south, mid and north Wales.

    And it’s not just the assets of support service organisations that should be considered; what happens if major transport infrastructure routes are disrupted or destroyed? How can support organisations respond to what will inevitably be a large rise in demand for their services in response to an increasingly severe flood risk? 

    Yet within the challenges that face the sector lie opportunities to make changes which will provide multiple benefits. Whilst warmer summers will undoubtedly lead to significant problems for many of our most vulnerable, the opportunity to pre-empt the worst impacts by using green infrastructure to provide natural shade and cooling will simultaneously help reduce rainwater run-off, improve mental and physical well-being, and improve habitats in and around property assets.

    The organisations which are most likely to thrive in conditions of increasing unpredictability will be those which have adopted a strategic approach to embedding resilience and subsidiarity. So the big questions to be answered by the different levels of governance within organisations which provide services for the vulnerable are:

    • Does the Board have the right strategic approach to preparing staff, property and other for a 2050 which will see much increased disruption from climate-influenced natural events?
    • Does senior management have the right tools to embed a culture of resilience and subsidiarity within the organisation?
    • Do front-line delivery staff have the right training, support and autonomy to enable them to react with confidence and good judgement in situations outside ‘normal’ work conditions

    We certainly can’t stop our climate from changing. But we can, and should, think carefully and strategically about how our organisations can play a significant role in making the transition to our new climate reality more sustainable and manageable. We owe no less to those who will depend upon us.

    1.     Extreme Carbon Inequality [Internet]. Oxfam International. 2015 [cited 2020 Mar 7].

    2.     List of countries by carbon dioxide emissions per capita. In: Wikipedia [Internet]. 2020 [cited 2020 Mar 7].

    3.     Girvetz E, Ramirez-Villegas J, Claessens L, Lamanna C, Navarro-Racines C, Nowak A, et al. Future Climate Projections in Africa: Where Are We Headed?: Investigating the Business of a Productive, Resilient and Low Emission Future. In 2019. p. 15–27.

    4.     The distribution of UK household CO2 emissions [Internet]. [cited 2020 Mar 7].

    5.     Well-Being of Future Generations (Wales) Act ’ [Internet]. 2015 anaw 2 Apr 29, 2015 p. 56.

    6.     Well-Being of Future Generations – The Essentials [Internet]. Welsh Government; 2015 [cited 2018 Oct 28].

    7.     Wales underwater? – Afallen [Internet]. [cited 2020 Mar 7].

  • Wales underwater?

    The Wales of 2050 will be a very different place.

    Our society, technology, culture and economy have always changed over generational timescales, so there’s nothing inherently original or insightful in my opening statement. However the changes to come will be manifestly different to those experienced by previous generations.

    That’s because our current and future generations will experience profound geophysical changes, forcing society to react rapidly, and in some cases to discard long-loved, cherished and critical parts of our culture and infrastructure.

    Sea level rise by 2050

    Although it’s impossible to know which of drought, flooding or wildfires will bring most misery to Wales’ inhabitants by 2050 – and each of these are serious issues on their own merit – I hazard that coastal flooding exacerbated by sea level rise will eclipse all of them.

    The latest data, published at the end of October, show graphically what happens to Wales’ coastal conurbations within the next generation. And the implications of this – the best of our global modelling on climate change impacts – deserves serious consideration within Welsh Government, within our local authorities and indeed by us as individuals, householders and communities.

    The data is interpreted in a way that helps us understand the impact in a map format by Climate Central, an independent organisation reporting on the facts of climate change. The modelling is based on the most robust and evidenced data, and although the modelling outputs come with inevitable caveats, they are the best indication we currently have about coastal flood risk for Wales.

    Whilst the modelling is highly customisable depending on your appetite for risk, the version I’ve used for this article is the central scenario for climate change, which incorporates:

    • ‘Average’ sea level rise plus annual flood
    • Moderate cuts to GHG emissions, consistent with 2 Celsius warming
    • Medium ‘luck’ (mid-range result from the range of possible projections of sea-level rise)
    The model is highly customisable for your tastes

    In the images that follow, anywhere coloured red is projected to be “below annual flood level” in 2050. That means that coastal flooding is anticipated to happen annually, with multiple flooding events also possible on an annual basis.

    I’m going to take a place-by-place approach to the potential impacts, starting with my own hometown, Cardiff.

    Cardiff

    Areas of Cardiff which will experience coastal flooding on an annual basis by 2050 in red

    By 2050, much of Cardiff’s urban area will be at risk of annual coastal flood events. Notwithstanding the resilience provided by the Barrage, coastal water ingress is likely to be an issue with much of the low-lying land along Cardiff’s wider seafront and the Afon Rhymni, leading potentially to widespread penetration.

    Many of our institutions will have to consider how they manage this risk, including iconic landmarks such as Cardiff Castle, the Royal Welsh College of Music & Drama, the National Assembly, Sophia Gardens, the International Sports Village and the Principality Stadium.

    The Bay and a huge swathe of West Cardiff, including Grangetown, Riverside and Canton, along with the city centre, Bute Park, and huge chunks of east Cardiff such as Roath, Adamsdown and Tremorfa are highlighted as facing significant flooding issues.

    Nationally significant infrastructure such as major electricity substations and railway and road infrastructure is potentially at risk, as are the large chemical and industrial sites which lie along Cardiff Bay and the dock areas.

    Newport

    Newport's annual coastal flood risk by 2050

    Newport’s famous hills, which provide spectacular viewpoints for the city and estuary and are a source of misery for casual cyclists, provide some resilience against coastal flooding.

    Parts of the city centre, including the Royal Gwent hospital, escape the projected risk areas, but the Passport Office and Transporter Bridge, along with much of the riverside past Caerleon and beyond Newbridge-on-Usk fall into the annual coastal flood risk category.

    The Gwent Levels along with several golf courses are at risk of regular inundation of salt water, with the natural habitat presumably being significantly more resilient than the leisure facilities.

    Although not included in the image above, a large swathe of coastal land from Newport to Chepstow is at risk, including the whole of the mainline railway linking south Wales to Bristol and beyond.

    The Vale of Glamorgan

    The Vale of Glamorgan's flood risk by 2050

    The Vale demonstrates more resilience than the coast further east, by virtue of high cliffs along much of the coastline. Penarth faces only a very modest impact at the harbour, but Barry Island, the docks and ports and the Dow chemical plant are all at risk. The danger zone for Barry extends along to Sully and up towards the lowest lying areas of Dinas Powys.

    The most heavily industrial parts of the vale, including around the power station and cement works near Aberthaw are included within the at-risk areas.

    Bridgend

    Porthcawl's annual coastal flood risk by 2050

    The misery of annual flooding for Bridgend County Borough appears to be concentrated on Porthcawl. The low-lying caravans of Trecco Bay are at risk, as are central residential areas of the town.

    Neath Port Talbot

    Flood risk for 2050 for Neath Port Talbot

    The low coastline from Porthcawl to Swansea poses significant potential problems for transport infrastructure, as well as for some industrial and residential sites. Areas impacted include the Kenfig Industrial Estate, the Port Talbot town and the residential areas of Aberavon, Baglan Moor, along with the Tata steelworks.

    The Afon Nedd carries the risk further upstream, potentially impacting settlements along the riverside in Neath itself, nearl as far as Aberdulais.

    Swansea

    Swansea's annual coastal flood risk areas

    The impact for Swansea is mostly felt around the lower part of the town – Sandfields and the Maritime Quarter – and at the new Bay campus to the east of the city. The Amazon distribution centre, along with incoming road and rail links could also be impacted.

    Carmarthen Bay

    The annual coastal flood risk areas around Carmarthen Bay

    The estuary areas around Carmarthen Bay look particularly vulnerable, albeit in regions of low population density. The north Gower coast, along with swathes of the estuary ranging from Pontarddulais down to Pembrey and Kidwelly are at risk, as is the Pembrey West airport. The Afon Tywi is a flood risk factor for parts of Carmarthen and higher up the riverside. Further west Laugharne and St Clears are likely to be impacted.

    Pembrokeshire

    A low coastal flood risk for Pembrokeshire

    Pembrokeshire appears to be spared the worst of the coastal flooding risk, presumably because it has less land area at lower altitude than many other parts of Wales. The small but regionally significant populated centres of Pembroke and Haverfordwest will likely see some impact, and the campsite at Newgale – already a temporary lake-site during times of heavy rain – will be hit hard during high tides and storms.

    Ceredigion

    Ceredigion's annual coastal flood risk

    Whilst the southern part of the county escapes the worst of the coastal flood risk, the north will probably take quite a hit. Lower Aberystwyth, from the harbour up to Glanyrafon, could potentially be inundated, causing problems for transport infrastructure and for regulators and officials in Welsh Government and Natural Resources Wales.

    Borth - a grim prospect by 2050

    Borth is predicted to be particularly vulnerable, with the whole village – and the estuary right up to Machynlleth- predicted to flood on an annual basis. On the other side of the estuary (and into Gwynedd), Aberdyfi and Tywyn also face huge challenges.

    Gwynedd and Ynys Môn

    Gwynedd and Ynys Mon

    Both these iconic counties face probably localised problems with coastal flooding in the decades to come.

    Gwynedd’s problems are in pockets in the south (Aberdyfi, Tywyn) and west (Porthmadog). Môn’s issues will be felt strongest along the Afon Cefni, and in lower lying areas around The Valley in the west.

    Conwy

    Conwy's annual coastal flood risk in 2050

    The risks for Conwy are centred on the Afon Conwy, which could bring coastal floods upstream as far as Llanrwst, Llandudno, and the low-lying areas to the west of the Afon Clwyd. Large areas of agricultural land, as well as numerous coastal communities in this area and regionally significant transport and health infrastructure are vulnerable.

    Denbighshire

    Denbigshire's flood risk

    Denbighshire has a short coastline, but it is low-lying, and therefore all modelled as having a very high risk by 2050.

    The communities of Rhyl and Prestatyn face severe hardship from the impact of coastal flooding on an annual basis in the absence of any major infrastructure to provide coastal protection.

    Flintshire

    Coastal flood risk for Flintshire

    Flintshire’s coast is also modelled as having severe risk. Potentially significant energy and industrial infrastructure including power stations, Tata Steel, the Deeside industrial estate and park and commercial sites at Shotton.