Author(s): Thidarat Komkong; Sanit Wongsa; Shinichiro Nakamura
Linked Author(s):
Keywords: Adaptation measures; Climate change; Urban flood; IRIC Software; Thailand
Abstract: In urban areas especially Bangkok, Thailand at risk from sea-level rise and heat waves, storms, and floods whose frequency and/or intensity climate change is likely to increase. This article aims to study the adaptation measures to climate change for reducing the impact of floods from heavy rainfall cause in urban areas. Through an in- depth case study of the impact of the flood (depth, area, duration) under the current drainage system and the designed drainage system in the future including under the adaptation measures to reduce the impact of flood such as sponge city, retention pond within urban areas by using iRIC (Nays2D Flood) model. It is used to simulate a flood event that occurred at this site and adapted to simulate under heavy rainfall caused by clima te change. The procedure is commencing by studying the existing drainage system. The calibration, and validation of the parameter which effects on simulation model such as, a runoff coefficient, a coefficient of Manning’s n. From the results, we are realized the existing drainage system could not achieve the design rainfall. Case of the present, flooding in the study areas, depth of flood 15-20 centimeters, and duration about 1-3 hours. Under projected climate change scenarios, the results of flood depths, duration and areas are increased from the present condition more than 1.0 - 3.0 times in the study area. From the adaptation measure cases, it will also reduce the impact of flooding from climate change conditions about 1.0 – 2.0 times in the study areas.
Year: 2020