Nigechizu (EVACUATION TOPOLOGY AND TIME MAP)

There is a estimation that if the evacuation was properly conducted, the majority of the two thousand casualties may have survived from the Tsunami that struck the Tohoku region in 2011.

"Nigechizu"(Evacuation map) is a method to visualize the proper evacuation route and time in the vulnerable areas for Tsunami. Initially by workshops, the residents will be enthused and alerted to recognize the risk of Tsunami using there own time and effort.

The method is feasible to conduct using daily materials; a string to measure the distance, a printed map and a few colors of pen. The method triggers conversation within the residence of detailed conditions that lay in the evacuation route.

Every applicant will participate in making the "Nigechizu"(Evacuation map) by coloring the path gradually by units of 400m (10min walk by a aged person). Resulting a infographic showing the duration for evacuation. Additionally, people can add paths, build towers to compare and evaluate the new proposal by balancing the effect and the budget.

While this method can be done in an analogue way, we have developed a web application "Nigechizu 2.0"; the same concept using the Dijkstra algorithm. By automated coloring, the same method can be applied to remote areas and areas that have extensive population. "Nigechizu 2.0" can also add paths to upgrade the whole evacuation time, and each attempt will be saved to the database as discrete proposals. The endless feedback from the local residents will ensure higher precision to the planners which is responsible for urban planning.

By combining the two "Nigechizu", we have created a method to educate and provoke the people to recognize the risk of living beside the ocean.

This method was first created through the needs of the Tohoku Tsunami disaster.

逃げ地図は、避難経路と避難にかかる時間を可視化する取り組みです。

住民が自分たちの手で時間をかけて作ることで、無関心・無自覚をなくし、津波リスクに対する関心を高めることができます。印刷した地図と色鉛筆など身近なものでつくること可能で、自分たちの過去の津波被害の教訓や体験を取り込み、次代の災害に備える事ができます。

住民みんなで津波避難ポイントまでの到達時間津波の避難経路を10分(400m)ごとに色で塗り分け、どの地域が何分で避難ポイントに到達できるかが可視化することが出来ます。作成した逃げ地図をもとに危険地域の対策を検討しその効果を確認することが出来ます。

また、作成した地図をWEBアプリ化する。
アプリ化することでインターネットでの参加が可能に有り、メンバーが訪れにくい場所や人口が多い地区に対応することが出来るようになります。また世界中の人から対策案や評価をもらい瞬時に再検討する事で集まったフィードバックを基に住民が改善案を検討するというループが生まれ、より安全なまちに更新し反映し続けることが可能になります。

このシステムは、2011年の東日本大震災後の津波被害地区住民とともに開発されました。

Key features: 

risk visualization
collaborative decision making

Video: 

C4R "Nigechizu" movie

"Nigechizu" movie clip

Nigechizu movie clip

Screenshots: