{
  "abstract": "Three-dimensional flood propagation through the Bhote Koshi--Langtang Khola junction at Syabrubesi, Nepal, is studied using an incompressible free-surface model. The calculation is motivated by the August 2026 flood and examines the passage of an imposed inflow through the local bends and changes in channel width. The Navier--Stokes equations and an interface transport equation are solved on unstructured tetrahedral meshes constructed from pre-event terrain data. For an inlet speed of $10\\,\\mathrm{m\\,s^{-1}}$, the solution indicates surface speeds above $40\\,\\mathrm{m\\,s^{-1}}$. The advancing front spreads across the junction; as the flow develops, water deepens and slows around the bend. Higher speeds persist in the confined upstream and downstream regions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.38351",
  "author_total": 2,
  "authors": [
    {
      "name": "Rainald Löhner"
    },
    {
      "name": "Harbir Antil"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fzdsqt2n4wgzn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.38351",
  "fulltext_url": null,
  "id": "fzdsqt2n4wgzn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.38351",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.flu-dyn"
    ],
    [
      "arxiv",
      "physics.geo-ph"
    ],
    [
      "openalex",
      "2306|Flood Risk Assessment and Management"
    ]
  ],
  "openalex": "W7215104191",
  "pdf_url": "https://arxiv.org/pdf/2609.38351",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fzdsqt2n4wgzn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2609.38351",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.38351"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "arxiv:physics.geo-ph",
      "subfield": "geophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Three-Dimensional Simulation of Flood Propagation at Syabrubesi, Nepal",
  "title_text": "Three-Dimensional Simulation of Flood Propagation at Syabrubesi, Nepal",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/fzdsqt2n4wgzn",
  "venue": "arXiv",
  "versions": []
}