Flood Damage Estimations Based on Extreme Precipitation and Discharge and Variation in the Future

Abstract

This study presented a method to assess the economical flood damages based on a hydraulic model, which took into account a spatial distribution of extreme precipitation estimated by statistical and meteorological characteristics. In order to estimate variation of precipitation in the future, we used cumulative distribution function of precipitation that was outputted by GCMs. The potential economic damage in 2100 (RCP8.5 scenario) for a flood of 100-year return period was estimated to be 107 billion USD. We evaluated the effect of flood control level using some GCMs with scenarios.

Investigating the Influence of Various Stormwater Runoff Control Facilities on Runoff Control Efficiency in a Small Catchment Area

“…In Japan, clear changes in hourly flood peak discharge, daily drought discharge, and monthly discharge have been reported as the effects of climate change [16]. In addition, the potential economic damage in 2100 (RCP8.5 scenario) for a flood of 100-year return period was estimated to be 107 billion USD (1.10-1.36 times greater than the current value) [17]. In Western countries, low-impact development (LID) [18,19], green infrastructure (GI) [20], and sustainable urban drainage systems (SUDS) [21,22] were introduced as methods for stormwater management in order to reduce the runoff volume and nutrient load from non-point sources.…”