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iRIC(international River Interface Cooperative)

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日本
Sapporo-shi, Hokkaido
iRIC(international River Interface Cooperative)

iRIC is a public-domain modeling interface and an associated group of open-source models that can be

iRIC is a public-domain modeling interface and an associated group of open-source models that can be used to simulate flow, sediment transport, channel and bank evolution and habitat in riverine environments across a wide range of temporal and spatial scales

03/10/2026

Simulation of a hydraulic jump by iRIC-Freebird VOF.

03/10/2026

The next step for iRIC-Freebird is simulating erosion of structures like levees, incorporating both surface flow and subsurface infiltration using the 3D VOF method based on Onda et al. (2013, 2019).
As a first step, we are currently exploring how to integrate the VOF method into iRIC-Freebird.
This example shows a dam-break simulation inside a closed 3D domain. Compared to conventional Sigma-coordinate models, it offers superior mass conservation, and we've started getting promising results.

02/09/2026

札幌駅東改札口の外でiRICのポスター展示中です。
良かったら見て下さい。

02/09/2026

On August 31, 2026, I was invited to give a keynote lecture at a Japan–Taiwan seminar on sediment transport and riverbed morphodynamics, organized by the JSCE’s “young” researchers’ group — or, more precisely, a self-proclaimed young researchers’ group. 😄

As usual, I showed off the latest tricks of Cabernet2D and Freebird, and fortunately, they seemed to enjoy the show!

I was especially impressed by the Taiwanese team from Tainan. Their technical level was outstanding — they had already simulated the glacial-collapse flood in Nepal that had occurred only a few days earlier. That was fast!

A very stimulating day, and a good reminder that in research, we should stay young… at least in spirit! 😄

06/08/2026

August 5, 2026
The annual Japan–Korea Seminar, which alternates between Japan and Korea each year, was held in Japan this year.
I gave a live demonstration of the latest versions of Cabernet2D and Freebird, showcasing their many new features, which have expanded significantly over the past year.
Many of the presentations from our Korean colleagues focused on riverine material transport (dispersion) and advanced measurement techniques.
As always, we enjoyed dinner at the famous Sapporo B**r Garden, and on the second day, we spent time exploring the Toyohira River together.

23/07/2026

July 20–22, 2026

We participated in the IAHR-APD (International Association for Hydro-Environment Engineering and Research – Asia and Pacific Division Conference) held in Incheon, South Korea, where we exhibited the iRIC software at the exhibition booth. We also presented our latest research on Riemann invariants, which provide the theoretical foundation for a new boundary-condition formulation implemented in Cabernet2D, one of iRIC's newest solvers.

In addition, researchers from the Public Works Research Institute (PWRI) presented simulation results demonstrating the application of iRIC-Cabernet2D to complex river flows in the Kurobe River, including channel bifurcation/confluence and mixed subcritical–supercritical flow conditions.

Both the exhibition booth and the research presentations attracted considerable interest from conference participants, making the meeting an extremely rewarding and productive experience.

On a personal note, I was deeply honored to receive the Distinguished Member Award at the conference in recognition of my long-standing contributions to the IAHR community, as well as the international collaboration activities that my colleagues and I have promoted through the iRIC project. I would like to express my sincere gratitude to everyone who has supported these activities over the years.

2026年7月20日～22日,韓国仁川市において開催されたIAHR-APD(国際水理学会環太平洋地域大会)に iRICのブース展示、およびiRICの新しいソルバーであるCabernet2Dに新しい概念を用いた境界条件の理論的バックグランドであるRiemann不変量に関する研究発表と、iRICのブース展示を行ってきました。

研究発表では土木研究所のほうからも黒部川で行われた分合流・常射流を含む複雑流れに対してiRIC-Cabernet2Dを適用した計算結果の発表もありました。

ブース展示、研究発表共に大変多くの皆様に興味を持って頂き、大変有意義な学会参加になりました。

なお、私事ではありますが学会において長年の学会に対する貢献や、私共がiRIC活動を通じて行ってきた各国との国際交流活動に対して、大変名誉な功績賞を頂きました。すべて関係者も皆さまに心から感謝を申し上げます。

20/07/2026

We had distinguished guests at iRIC booth.

19/07/2026

Yes!
We are open, please visit us.

住所

Sapporo-shi, Hokkaido