iRICSoftware
Latest ／ Windows 64bit ／ approx. 325 MB ／ 2026-08-01
iRIC 4.2Download
iRIC — free river simulation software

How-to questions, answered from the manuals
by iRICbot.

Grounded in the Nays2DH and Nays2DFlood manuals, tutorials, worked examples, and an FAQ distilled from the forum. Every answer cites its source.

How to build a gridCalculation divergesSetting roughnessExport results to CSV

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Recent updates

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NoticeSep 4, 2026FOSS4G Hiroshima 2026に参加・出展しましたNoticeSep 2, 2026Keynote lecture at a Japan–Taiwan seminarNoticeJul 29, 2026RRI v2講習会が開催されましたNoticeJul 24, 2026IAHR-APDでiRIC関連の発表をしましたNoticeJul 18, 2026土砂災害勉強会でiRICのプレゼンをさせて頂きましたNoticeJul 13, 2026iRIC-RRI,RSR講習会が開催されました

Case studies and related services

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Real-world and research applications of iRIC, and related services offered by iRIC-UC members.

Case studies are being prepared, cross-linked with solvers and members. Related services are created and published by members on the iRIC-UC site (uc.i-ric.org) and mirrored here.