2015 年 21 巻 p. 497-502
This study proposed a method for assessment of flood damage to rice-crops. In the method, the hazard characteristics such as flood depth and duration were computed by using Rainfall Runoff Inundation (RRI) model. To estimate rice-crop damage, damage functions were derived from past observation data of rice-crop damage, growth stages of rice crop, and height of rice plants. The rice-crop damage was defined as function of flood depth, flood duration and growing stage of rice plant. The rice-crops damages were estimated based on flood inundation characteristics, growth stage of rice plants and developed damage function. By using proposed methodology, rice-crops flood damage assessment was conducted in the Pampanga river basin of the Philippines for September 2011 flood event and 50 and 100 years return period flood events cases. The estimated rice crops damages were compared with reported values.
