Recent flood damages in urban areas have increased the need for urban planning and building measures to respond to inundation risks. In this article, in order to obtain suggestions for building and land use management based on inundation risks, floodproofing plans are examined for a two-story wooden detached house located in an urban area. Then, the additional building cost compared with the benchmark standard plan, and the amount of damage reduction due to floodproofing are estimated. Finally, the applicability of such floodproofing measures are examined by analyzing the cost-effectiveness of plans under various conditions of inundation probability. *1 (国研)建築研究所住宅・都市研究グループ 博士(工学) (〒 305-0802 茨城県つくば市立原１) *2 (国研)建築研究所住宅・都市研究グループ 博士(環境学) *3 (国研)建築研究所材料研究グループ 博士(農学)

Following the Great East Japan Earthquake, the housing lease program for disaster victims supplied over 60,000 private rental houses that serve as temporary housing. The number of houses has exceeded the number of newly constructed units of prefabricated temporary housing and many residents moved to urban areas in order to acquire rental houses. To examine moving processes and living conditions of residents under this program, an interview survey was conducted with residents living in leased houses in Sendai City. The following results were obtained. (1) Residents who were able to acquire housing in the early stage found rental houses with the cooperation of relatives and acquaintances, instead of real estate agents. (2) Many residents were not able to acquire adequate houses for the number of persons in their households. For this reason, families had to live separately. (3) Some residents experienced stress with their new life in rental houses because of the drastic change in their living environment.

After the Great East Japan Earthquake, the housing lease program for disaster victims provided private rental houses to be used as temporary housing. Many victims moved from where they had originally lived to other municipalities when they moved in rental houses. To examine the influence of these movements on where rebuilding occurred, data concerning lease terminations in this program in Iwate Prefecture were analyzed. Approximately 80% of households left the leased houses, generally two or six years after the disaster. 60% of households that moved to other municipalities under this lease program have not returned to their original municipalities.

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buildings and facilities will beceme sociaL problems， and reconstruction will be necessary in the future ． Consensus ainong all unit owners of condominium is need to realize reconstruction ， but consensus building is very difficul し Therefbre ， it is important to establish the method of consensus ， In this sω dy， I investigated 13cases of recQnstruction and examined the process and mechanism of consensus building ． Following points are analyzed ： 1 ) prooesses of the consensus building ； 2 ) issues on the process； 3) mechanism of consensus building ； 4) ro 置 es of leading group ，