Abstract: According to the formula of runoff coefficient of integrated rainfall,a rapid estimation method of runoff coefficient of integrated rainfall is proposed based on spectral features of high resolution image. With object oriented segmentation and classification technology and shadow classification method, classification information of demonstration area is obtained, so as to achieve the purpose of estimating the ratio.Taking Jiaxing sponge city demonstration area as an example, this paper compares the results of the national geographical census in Jiaxing to verify the feasibility of the method.

Key words: runoff coefficient of integrated rainfall, spectral features, rapid estimation, sponge city, the national geographical census of Jiaxing