--- title: Human-enhanced tsunami hazard in large lakes | daily.dev description: Human-driven erosion over two millennia tripled sediment flux into Lake Iseo's Oglio River Delta, oversteepening it until earthquakes triggered catastrophic... canonical: https://daily.dev/posts/human-enhanced-tsunami-hazard-in-large-lakes-aax8jqifb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Human-enhanced tsunami hazard in large lakes | daily.dev og:description: Human-driven erosion over two millennia tripled sediment flux into Lake Iseo's Oglio River Delta, oversteepening it until earthquakes triggered catastrophic... og:url: https://daily.dev/posts/human-enhanced-tsunami-hazard-in-large-lakes-aax8jqifb og:image: https://api.daily.dev/og/posts/aaX8JqIfb.png og:image:alt: Human-enhanced tsunami hazard in large lakes og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Human-enhanced tsunami hazard in large lakes **[Hacker News](https://daily.dev/sources/hn)** · 34 min read · 0 upvotes · 0 comments ## Summary Human-driven erosion over two millennia tripled sediment flux into Lake Iseo's Oglio River Delta, oversteepening it until earthquakes triggered catastrophic collapses and tsunamis. Researchers reconstructed two medieval events using sediment cores and numerical modeling: a 1117 CE Mw 6.5 quake caused a delta collapse generating waves over 50 m high that reached shore within a minute, and a 1222 CE Mw 6.0 quake produced a tsunami peaking at about 13 m. Historical accounts from the Vatican Library and archeological evidence from a damaged 12th-century church corroborate the reconstructions. Eight centuries of continued erosion have rebuilt the delta, and a global synthesis of 632 lake-watershed records shows human-driven erosion is now at its highest level since the Industrial Era, raising similar tsunami risks in lakes worldwide. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What caused the medieval tsunamis in Lake Iseo, Italy? Two earthquakes, the 1117 CE Verona earthquake (Mw 6.5) and the 1222 CE Brescia earthquake (Mw 6.0), triggered subaqueous collapses of the Oglio River Delta, which had been oversteepened by centuries of human-driven erosion from agriculture and deforestation. The collapses generated tsunamis with maximum run-ups of about 50 m and 13 m respectively, with the first event inundating shores within one minute and reaching about 2.7 km inland. _Those mapping cascading natural-hazard risk can track research like this tsunami reconstruction on daily.dev._ ### How much did human land use increase sediment flux into Lake Iseo's delta? Intensified deforestation, agriculture, and pastoralism since the Roman period caused a threefold rise in sediment flux to Lake Iseo compared with earlier Holocene background levels. This rapid sediment buildup steepened the Oglio River Delta's subaqueous slopes, making them more prone to collapse when seismic shaking occurred, a pattern researchers link to earthquakes in 1117 CE and 1222 CE. _Researchers following erosion and hazard modeling trends can keep up with findings like this on daily.dev._ ### What numerical models were used to simulate the Lake Iseo delta collapse and tsunami? The landslide dynamics were simulated with BingClaw, a two-layer depth-averaged viscoplastic debris-flow model using Herschel-Bulkley rheology, while tsunami wave propagation and inundation were modeled with GeoClaw, an open-source nonlinear shallow-water equation model. A dispersive model, BoussClaw, was also tested but found negligible dispersion effects, with a Stokes-Ursell number of about 10 confirming nonlinear, nondispersive wave behavior. _Those building or evaluating open-source geophysical simulation tools can follow such technical writeups on daily.dev._ ## Similar posts on daily.dev - [Satellite data reveal how Antarctica’s ice cliffs behave over time](https://daily.dev/posts/satellite-data-reveal-how-antarctica-s-ice-cliffs-behave-over-time-nvocswzf0) · MIT News · 0 upvotes · 0 comments - [Under 10% of an earthquake’s energy makes the ground shake](https://daily.dev/posts/under-10-of-an-earthquake-s-energy-makes-the-ground-shake-hchgu7trg) · MIT Technology Review · 0 upvotes · 0 comments - [Google is using old news reports and AI to predict flash floods](https://daily.dev/posts/google-is-using-old-news-reports-and-ai-to-predict-flash-floods-ke3nuswgu) · TechCrunch · 1 upvotes · 0 comments - [Building Natural Seawalls To Fight Off The Rising Tide](https://daily.dev/posts/building-natural-seawalls-to-fight-off-the-rising-tide-2m1hg4kch) · Hackaday · 0 upvotes · 0 comments - [Natural disasters and government interference: examining Q2 2026’s major Internet disruption event](https://daily.dev/posts/natural-disasters-and-government-interference-examining-q2-2026-s-major-internet-disruption-event-ty7vyfkbu) · Cloudflare · 0 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/human-enhanced-tsunami-hazard-in-large-lakes-aax8jqifb) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Human-enhanced tsunami hazard in large lakes","url":"https://daily.dev/posts/human-enhanced-tsunami-hazard-in-large-lakes-aax8jqifb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/human-enhanced-tsunami-hazard-in-large-lakes-aax8jqifb"},"datePublished":"2026-10-29T12:43:58.535Z","dateModified":"2026-10-29T12:44:36.143Z","description":"Human-driven erosion over two millennia tripled sediment flux into Lake Iseo's Oglio River Delta, oversteepening it until earthquakes triggered catastrophic...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b2a59dcaad1c59be19fce60004a6f74c?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b2a59dcaad1c59be19fce60004a6f74c?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Hacker News","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Hacker News","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/hn","url":"https://daily.dev/sources/hn"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/human-enhanced-tsunami-hazard-in-large-lakes-aax8jqifb","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"","timeRequired":"PT34M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Hacker News","item":"https://daily.dev/sources/hn"},{"@type":"ListItem","position":3,"name":"Human-enhanced tsunami hazard in large lakes"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/human-enhanced-tsunami-hazard-in-large-lakes-aax8jqifb#faq","mainEntity":[{"@type":"Question","name":"What caused the medieval tsunamis in Lake Iseo, Italy?","acceptedAnswer":{"@type":"Answer","text":"Two earthquakes, the 1117 CE Verona earthquake (Mw 6.5) and the 1222 CE Brescia earthquake (Mw 6.0), triggered subaqueous collapses of the Oglio River Delta, which had been oversteepened by centuries of human-driven erosion from agriculture and deforestation. The collapses generated tsunamis with maximum run-ups of about 50 m and 13 m respectively, with the first event inundating shores within one minute and reaching about 2.7 km inland. Those mapping cascading natural-hazard risk can track research like this tsunami reconstruction on daily.dev."}},{"@type":"Question","name":"How much did human land use increase sediment flux into Lake Iseo's delta?","acceptedAnswer":{"@type":"Answer","text":"Intensified deforestation, agriculture, and pastoralism since the Roman period caused a threefold rise in sediment flux to Lake Iseo compared with earlier Holocene background levels. This rapid sediment buildup steepened the Oglio River Delta's subaqueous slopes, making them more prone to collapse when seismic shaking occurred, a pattern researchers link to earthquakes in 1117 CE and 1222 CE. Researchers following erosion and hazard modeling trends can keep up with findings like this on daily.dev."}},{"@type":"Question","name":"What numerical models were used to simulate the Lake Iseo delta collapse and tsunami?","acceptedAnswer":{"@type":"Answer","text":"The landslide dynamics were simulated with BingClaw, a two-layer depth-averaged viscoplastic debris-flow model using Herschel-Bulkley rheology, while tsunami wave propagation and inundation were modeled with GeoClaw, an open-source nonlinear shallow-water equation model. A dispersive model, BoussClaw, was also tested but found negligible dispersion effects, with a Stokes-Ursell number of about 10 confirming nonlinear, nondispersive wave behavior. Those building or evaluating open-source geophysical simulation tools can follow such technical writeups on daily.dev."}}]} ```