Mikiko Ishikawa

Creating ecological infrastrastructure, as the reconstruction plan of Great East Japan Earthquake

Mikiko Ishikawa
Professor of the University of Tokyo, Envirinmental Design, Department of Urban Engineering, Faculty of
Engineering, 7-3-1 Hongo Bunkyou-ku, Tokyo 113-8656, Japan
Day 3 11:10-12:00

On March 11 in 2011, Great East Japan Earthquake had occurred. 15,805 people died and still 4,040 people are missing. The characteristic of this disaster is earthquake, tsunami, and nuclear radiation. The damaged areas are divided into three regions. The first is the rias coastal zone from Iwate Pref. to northern Miyagi Pref. The second is alluvial flats created by the Kitakami River, the Natori River and the Abukuma River. The third is Fukushima. As for the rias coastal zone, in 1896, 1933, 1960, tsunami destroyed these area, and reconstruction plans were implemented, and finally failed. As for the alluvial flats areas, a lot of people died in this tsunami, however we did not have any experience how to establish the reconstruction plan, since there exists only the record that tsunami had attacked in 869 and 1605.

Based on the above background, we have been working for the reconstruction plan of the alluvial flats area, especially the southern region of Sendai. Extensive surveys have been carried out, and we set up the principal that the reconstruction should be based the ecological infrastructure. To identify and create the ecological infrastructure is the main issue. The process is as follows. Firstly, from the comparative analysis of micro geography and the survey map in 1899, we set up the hypothesis of basic land use principals. Secondly, vegetation, wetland, agriculture, water system, historical landscapes and cultural landscapes are analyzed and find the relationship between the land use principals and classified landscape units. Thirdly, by comparing the damages of tsunami, we introduced the strategies how to improve or preserve the landscape units. Finally by synthesizing the landscape units, we identified ecological infrastructure. Ecological infrastructure, economy, and energy policies are combined together, and the reconstruction master plan was approved in Iwanuma City on Aug. 7, 2011. The other cities are still in a process of planning. We could say it will be a challenge for the city and regional planning to introduce the ecological infrastructure as a basic formation.

Mikiko Ishikawa

Master of Landscape Architecture (Harvard University), Ph.D. (The University of Tokyo), Certified Landscape Architect and City and Regional Planner. Professor of Urban Engineering Department, the University of Tokyo.



Selected publications:

City and Green Space (2001), Watershed planning (2005)