{"id":40048500,"url":"https://github.com/dvalters/hail-caesar","last_synced_at":"2026-01-19T05:38:00.638Z","repository":{"id":19654873,"uuid":"87577150","full_name":"dvalters/HAIL-CAESAR","owner":"dvalters","description":"The High-Performance Architecture-Independent LISFLOOD-CAESAR model of floodplain, river, and sediment dynamics","archived":false,"fork":false,"pushed_at":"2025-08-12T12:08:08.000Z","size":36059,"stargazers_count":42,"open_issues_count":32,"forks_count":13,"subscribers_count":5,"default_branch":"master","last_synced_at":"2025-08-12T14:25:36.083Z","etag":null,"topics":["caesar-lisflood","cellular-automaton","flood-inundation","hail-caesar","hydrological-model","landscape-evolution","lisflood","numerical-modelling","sediment-transport"],"latest_commit_sha":null,"homepage":"http://dvalters.github.io/HAIL-CAESAR","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/dvalters.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":"CONTRIBUTING.txt","funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2017-04-07T18:49:30.000Z","updated_at":"2025-08-12T12:08:15.000Z","dependencies_parsed_at":"2025-08-12T14:21:56.146Z","dependency_job_id":null,"html_url":"https://github.com/dvalters/HAIL-CAESAR","commit_stats":null,"previous_names":[],"tags_count":4,"template":false,"template_full_name":null,"purl":"pkg:github/dvalters/HAIL-CAESAR","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dvalters%2FHAIL-CAESAR","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dvalters%2FHAIL-CAESAR/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dvalters%2FHAIL-CAESAR/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dvalters%2FHAIL-CAESAR/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/dvalters","download_url":"https://codeload.github.com/dvalters/HAIL-CAESAR/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dvalters%2FHAIL-CAESAR/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":28561903,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-01-19T03:31:16.861Z","status":"ssl_error","status_checked_at":"2026-01-19T03:31:15.069Z","response_time":67,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.6:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["caesar-lisflood","cellular-automaton","flood-inundation","hail-caesar","hydrological-model","landscape-evolution","lisflood","numerical-modelling","sediment-transport"],"created_at":"2026-01-19T05:38:00.507Z","updated_at":"2026-01-19T05:38:00.633Z","avatar_url":"https://github.com/dvalters.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"[![Build Status](https://travis-ci.org/dvalters/HAIL-CAESAR.svg?branch=master)](https://travis-ci.org/dvalters/HAIL-CAESAR) \n[![Documentation Status](https://readthedocs.org/projects/hail-caesar/badge/?version=latest)](http://hail-caesar.readthedocs.io/en/latest/?badge=latest)\n[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)\n[![DOI](https://zenodo.org/badge/87577150.svg)](https://zenodo.org/badge/latestdoi/87577150)\n\n\n# HAIL-CAESAR\n\nThis is the development version of the HAIL-CAESAR surface flooding model. (now including a basic Groundwater component)\n\n_The **H**igh-performance **A**rchitecture **I**ndependent **L**ISFLOOD-**C**AESAR model_\n\nHAIL-CAESAR is a hydrodynamic, landscape evolution, cellular automaton model. In other words, it simulates the movement of water and erosion of sediment in a river catchment, for the purposes of investigating flood-inundation, sediment transport and catchment evolution over a range of timescales from hours to thousands of years. (And potentially longer if you are really patient enough...)\n\nThe development of HAIL-CAESAR is led by Declan Valters (@dvalters), at the British Geological Survey (@BritGeoSurvey). Over the years model development has been supported by funding from a NERC PhD Studentship, ARCHER eCSE funding awards, other NERC grants, in particular via the Edinburgh Land Surface Dynamics Group (@LSDTopoTools) at Edinburgh University, and the University of Manchester.\n\nThe model is derived from the [CAESAR-Lisflood model](https://sourceforge.net/projects/caesar-lisflood/), which is a C#/.NET Windows-based implementation of the model, with a very useful GUI. You may find much of the documentation and discussion for CAESAR-Lisflood relevant for using HAIL-CAESAR, but remember there are small differences at present, so treat the documentation [here](http://hail-caesar.readthedocs.io/en/latest) as the canonical source.\n\nHAIL-CAESAR doesn't have a GUI - the model is run from scripts or from typing commands at the command line/terminal. The model runs and writes output directly to files on disk. You then have to process these output files yourself to view the model output subsequently. \n\n[LSDMappingTools](https://github.com/LSDtopotools/LSDMappingTools) is a good package for visualising the output and producing research-quality figures from HAIL-CAESAR. GIS programs, such as the excellent [QGIS](www.qgis.org) are also useful.\n\n[Documentation can be found here](http://hail-caesar.readthedocs.io/en/latest).\n\n### Why is it called HAIL-CAESAR?\n\n*Historical interlude...*\n\nThe original CAESAR Model stood for **C**ellular **A**utomaton **E**volutionary **S**lope **a**nd **R**iver model. It was developed by [Tom Coulthard](http://www.coulthard.org.uk/) and was originally written in the C programming language. Later it was ported to the C# programming language and developed a GUI and you can watch the flood simulation update in real time on screen. Later still (2013), it was coupled with a flood inundation model, LISFLOOD-FP, which replaced the existing non-hydrodynamic flow routing model in CAESAR. In 2014-2016, it was translated into C++ to facilitate an OpenMP parallelisation of the model, so that it could be compiled and run on different computing services such as clusters and HPC, which are usually linux-based. I called it the **H**igh **P**erformance **A**rchitecture **I**ndependent **L**isflood **CAESAR** model, because everybody loves a good project acronym...\n\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdvalters%2Fhail-caesar","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdvalters%2Fhail-caesar","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdvalters%2Fhail-caesar/lists"}