2019 Volume 75 Issue 2 Pages I_253-I_258
Most of hydrological models are developed for simulating river discharge in a temperate area with assumption of rainfall runoff process such as quick subsurface flow in a shallow soil layer in a temperate zone. However, there is not sufficient research on long-term rainfall runoff process considering a deep soil layer in a humid tropical area. This research clarifies the reasonable model structure for a humid tropical area and potential use for analyzing long-term rainfall runoff process and inundation process with limited available data in Sumatra island. Reflecting vertical infiltration process into deep soil layer and ground water to RRI model, it performs better for reproducing river discharge compared with the subsurface flow and following parameter setting for tropical region. The model shows flood-prone zone with more than 50 cm inundation depth at the downstream, which can occur at 80 % probability in one year.
PROCEEDINGS OF HYDRAULIC ENGINEERING
