www.trees-dla.ac.uk/projects/sig... Interested in using data-science to understand the health of our rivers 💧 🧮 ? I have a ⭐ fully-funded ⭐ PhD project in the TREES Doctoral Landscape Award featuring a 6 month internship with @theriverstrust.bsky.social data-science team! Please share!
Alex Lipp
Alex Lipp
@alexlipp.github.io
Lecturer in Earth Sciences @es-ucl.bsky.social | Interested in rivers, mud, mountains, pollution, carbon cycling, quantitative methods, open science | alexlipp.github.io | www.sewagemap.co.uk | he/him | 🌍 🌱 🏔 🧗♂️ 🏕 🏃♂️
744 followers1.2K following127 posts
I often think this with respect to sewage spills from water co’s. If Thames *is* renationalised, the pollution doesn’t instantly stop and it’s no longer “sufficient abstract evil shareholder” to blame it’s literally the government. Do you really want to touch that 3rd rail?
It is worth remembering that one of the reasons public utilities were privatised originally was to depoliticise them and help politicians avoid blame for poor service. Nationalisation may be popular in the short-term, but there are longer-term risks of assuming responsibility for service quality.
Thanks to @mysociety.org for this great focus on SewageMap and what we’re doing to make sewage spill data more transparent! (And how the public can apply pressure for even more data!!)
"Just at a fundamental level it feels wrong for sewage to be going into rivers”: we spoke to @alexlipp.github.io about the importance of open data, and how sewagemap.co.uk uses our WriteToThem service to get people to convince their MPs of that too! www.mysociety.org/2026/04/16/h...
A proposal that would improve the university sector, bring in external investment and help normalise EU relations… so obviously the gov and UUK are dead against it
NEW: Britain in standoff with Brussels over demand to cut university tuition fees for European students, with row threatening to scupper Keir Starmer’s planned EU reset. @kiranstacey.bsky.social reports 👇 www.theguardian.com/politics/202...
giftarticle.ft.com/giftarticle/... “‘Is university still worth it?’ is the wrong question”
wonkhe.com/blogs/gradua... Remarkable quote: "We’ve gone from government suggesting that the state would subsidise undergraduate student loans by about 45p in the pound, to making a profit on them for that cohort."
Alex Lipp reposted
🚨 Pre-announcement! 🚨 We’re hiring for 2 x two-year, full-time roles to join me and the wider @palaeoverse.bsky.social team @es-ucl.bsky.social. - Research Software Engineer (REF: B04-06999): lnkd.in/eNRBiPnP - Community Engagement Coordinator (REF: B04-06998): lnkd.in/ejUACCzn
In our 💫 new preprint 💫 Barney Dobson & I drill into the statistics behind “shitty” headlines like these about the number & duration of sewage pollution spills. We analyse a dataset of nearly 4 million individual #sewage spill events… 1/ eartharxiv.org/repository/v...
This matters because water companies now need to create hydraulic models of thousands of CSOs to reduce their spilling… but unless they can model infiltration (hard!) they are likely to underestimate the frequency of the most damaging, long duration spills! 7/ www.gov.uk/government/p...
This was a very fun project to work on, with some neat stats & maths from fractals to fluid mechanics. We were surprised that for such a high profile dataset like sewage spills there had been such limited public statistical analysis until now! 💩 🧮 🧑💻 eartharxiv.org/repository/v... 8/8
In our 💫 new preprint 💫 Barney Dobson & I drill into the statistics behind “shitty” headlines like these about the number & duration of sewage pollution spills. We analyse a dataset of nearly 4 million individual #sewage spill events… 1/ eartharxiv.org/repository/v...
We think this is driven by daily fluctuations in water usage (🚿 💩) which modulates the length of sewage spills… eartharxiv.org/repository/v... 5/
What causes the heavy tail? When trying to replicate it using hydraulic models we can only do so by including infiltration of groundwater into pipes through cracks… this suggests that these long duration spills are *not* only occurring after heavy rain… eartharxiv.org/repository/v... 6/
In our 💫 new preprint 💫 Barney Dobson & I drill into the statistics behind “shitty” headlines like these about the number & duration of sewage pollution spills. We analyse a dataset of nearly 4 million individual #sewage spill events… 1/ eartharxiv.org/repository/v...
Statistically, this tail is well described by a stretched exponential distribution. It’s not quite as heavy as a power law, but much heavier than a vanilla exponential… eartharxiv.org/repository/v... 3/
A total (and cool 🤓) surprise for us, was the discovery of a periodic variation of the misfit to this modelled trend, fluctuating around spills that are multiples of 24 hours long… what’s causing this? eartharxiv.org/repository/v... 4/
In our 💫 new preprint 💫 Barney Dobson & I drill into the statistics behind “shitty” headlines like these about the number & duration of sewage pollution spills. We analyse a dataset of nearly 4 million individual #sewage spill events… 1/ eartharxiv.org/repository/v...
We find that sewage spills follow a very heavy-tailed distribution. 10% of spills account for 85% of all spilling *time*. So, it’s not the infrequent, short spills we should care about, it’s the infrequent long ones… eartharxiv.org/repository/v... 2/
Alex Lipp reposted
Another research institute opting for “short lived AI start-up chic” in their (no doubt vastly expensive) rebranding I see
Our Planet. Decoded. UKCEH makes sense of environmental complexity to power decisions that shape a better future. We don’t just examine our planet, we decode it – working out how to build a better tomorrow. 🎞️ youtu.be/s9fBwN5-kxM #UKCEH #EnvironmentalScience 🧪
Stunning conditions (and enthusiastic students!) for the first few days of the @es-ucl.bsky.social mapping course in North West Scotland! ☀️ ⛰️ ⚒️🏴 🗺️ #fieldworkfriday
Neat idea from psephology that might be useful for geological ternary plots too. Similar to the 4 component solid solution of garnet.
At next week's RSS conference I'll be presenting a poster (a first for me...it's about time!) "Tetraplot displays of UK General Election results" shows how to graph GE 2024 vote shares across 4 parties in a useful way. Full PDF poster at: github.com/DavidFirth/t...
Given that universities/gov are savaged in the media even for increasing fees with inflation, is there anything meaningfully lost from advocating for a one-off step change back to an inflation adjusted £9k (~£13k)?
On news that the government is likely to keep tuition fees rising with inflation here's my post from a few months ago on why that won't be enough to save the sector by itself. samf.substack.com/p/on-the-bri...
eartharxiv.org/repository/v... In our new preprint we describe in detail the software & workflows behind www.SewageMap.co.uk! One for the open environmental data nerds out there :) 💩 🧑💻 🏞️
Related reminder that the student loan repayment threshold for current students is now *£25000*... i.e., if you now graduate and get *any full time job* you will be paying back your loan. (www.gov.uk/repaying-you...)
A reminder that an annual salary on minimum wage is now £25,396.80
Alex Lipp reposted
Shamelessly replugging this from two years ago. We would never look at the proportion of, say, schools, that don't turn out literate pupils and go 'oh well, probably those kids were better off out of it'. We shouldn't view the short tail of bad courses and/or outcomes any differently:
The state should just predict what the 30 per cent of degrees that have no graduate premium are, despite the fact this 30 per cent is scattered across a pretty wide distribution of institutions, and then magically reassign that bottom 30 per cent to better jobs elsewhere.
Alex Lipp reposted
We are offering a full-time permanent academic post at Lecturer level (Grade 8) in UCL Earth Sciences. Research areas include the climate crisis, hydrogeology, sustainable resources, the energy transition, natural hazards, and planetary science. www.ucl.ac.uk/work-at-ucl/...
We at @es-ucl.bsky.social are hiring a Lecturer! Research area is broadly defined within the climate crisis, hydrogeology, sustainable resources, the energy transition, natural hazards, and planetary science. www.ucl.ac.uk/work-at-ucl/...
Total ignorance here that Universities *already offer* vocational training. The whole point of the 92 reforms was to give these vocational courses at polytechnics the same level of accreditation as academic degrees...
Certain Blue Labour backbenchers seem happy to publicly attack higher education, saying Britain needs vocational roles instead. But what did they choose for themselves? Elite higher education, of course. www.theneweuropean.co.uk/james-ball-i...
Really excellent news, and should never have been doubt. The original protest on Dartmoor was a hugely moving event and has sparked a new wave of R2R movement ⛰️ 🏕️ 🌱
WE WON! The Supreme Court has upheld the right to wild camp on Dartmoor. This is a huge win for access to nature. But we're just getting started. It was never just about Dartmoor. We’re fighting to extend the right to roam, swim, and sleep under the stars - across all of England.
Alex Lipp reposted
New Job! Please repost! We have a NERC funded PDRA position here @oxuniearthsci.bsky.social, 2 yrs, on modelling cryosphere change and hydrochemistry #models, #carbon, #permafrost, #deglaciation Come join our friendly team! Apply by 11/06, any Qs get in touch! my.corehr.com/pls/uoxrecru...
www.theguardian.com/business/202... I really question how useful this type of reporting is in practice. The question to ask is "Is This A Big Number?" and I just don't think we have enough years worth of data (3 years tops) to work out if 4m is, or is not, a big number...
Stop-Start data (i.e., *when* spills happened) is much more informative as it identifies potential links to rainfall, capacity etc... but only Thames Water actually readily share this data (see screenshot from sewagemap.co.uk). So, water co's don't help themselves! More open-data please!!!
Covered some of this territory in my piece for @theconversation.com a few months back: theconversation.com/water-compan...
www.theguardian.com/business/202... I really question how useful this type of reporting is in practice. The question to ask is "Is This A Big Number?" and I just don't think we have enough years worth of data (3 years tops) to work out if 4m is, or is not, a big number...
Alex Lipp reposted
www.theguardian.com/environment/... The new government policy on bathing water status seems to be taking direct inspiration from the survivorship bias meme, for some reason?!?
Alex Lipp reposted
"The intersection of science and politics is both inescapable and of vital importance. Scientists possess unique expertise that is crucial for informed policymaking and societal progress. Embracing political engagement allows scientist" www.theguardian.com/commentisfre...