ANALYSIS OF CORRELATION BETWEEN CHARACTERISTICS OF URBAN STRUCTURE AND THE SIZE OF SEISMIC FIRES AT THE GREAT HANSHIN-AWAJI EARTHQUAKE

摘要

The purpose of this paper is to analyze the relationship between the characteristics of urban structure and the size of the seismic fires in the Great Hanshin-Awaji Earthquake at Jan.17,1995. Satellite remote sensing data was used to estimate the urban green coverage ratio around all break out points of seismic fires. As a comparison, the characteristics of the urban structure which were estimated by using (a) arerial photograp which covers the disastrous area before the earthquake and (b)the summing data of town information for each street in Kobe city were used. The results of the investigation were mainly as follows.(1)Indices of flammability (wooden building ratio and old building ratio)showed a weak correlation with the size of fires.(2)Floor area ratio and population density, which were indices of urban density, had almost no correlation with the size of fires.(3)There was almost no correlation between the urban green converge ratio and the size of fires.4)93.6of the disastrous fires broke out in the few green covered urban area (green coverage ratio was under13.7.(5)444of the out break points of the seismic fires in the part of the urban area with few green converage spreads to conflagations.