Asian River Restoration Network (ARRN)

The Asian River Restoration Network was established in Nov. 2006 to support the exchange of information relating to environmental restoration of rivers and watersheds. JRRN has a role of ARRN secretariat currently.

Go to ARRN website

Contact us (Secretariat)

Lofty Chuoh Bldg., 7th Flr.

17-24, Shinkawa 1cho-me, Chuo-ku, Tokyo 104-0033, JAPAN

Foundation for Riverfront Improvement and Restoration
Tel: +81-3-6228-3860
Fax: +81-3-3523-0640


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Restoration of Chikuma River (Iiyama City and Nozawaonsen Village, Nagano Prefecture)

In midstream Chikuma River in Nagano Prefecture, most of the banks and side bars were pebble riverbeds until the Meiji Period. These days, however, the vegetation grows thickly in many places while waterfront plants such as reeds and cattails are disappearing rapidly. This is because the channel has become static as the riverbed has lowered and the frequency of flooding reduced.
For this reason, a natural regeneration project research was started in 2002 to regenerate the diversified functions of the river. In Awasa district of Chikuma City, a trial excavation experiment is being conducted to study the shape of the channel to be excavated as well as the excavation method so that a river environment unique to Chikuma River may be regenerated.


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