Title
Applicability of a kinematic wave based distributed hydrologic model for various climate and land use
conditions - 15:00
Speaker
T. Tanaka
Session
Hw15PS - Testing simulation and forecasting models in non-stationary conditions
Author(s)
Tanaka, T. 1; Tachikawa, Y. 1 - 1 Kyoto University, Japan
Abstract number
Hw15PS.01
Abstract
A distributed hydrologic model based on a kinematic wave flow approximation considering surface
and subsurface flow components is tested at various catchments with different climate and land use
conditions. The distributed model, 1K-DHM, has been applied to many Japanese mountainous
catchments in the temperate climate with wet conditions. The distributed hydrologic model is linked
with a two-dimensional inundation model in a lower flood plane to assess a change of inundation by
a change of flood discharge caused by climate and land use change. The distributed hydrologic model
estimates time and space distributions of discharge at the upper part of a study basin by a onedimensional kinematic wave model including surface and subsurface flow processes using a function
of discharge-soil storage relationship. 1k-DHM uses 1km spatial resolution topography data provided
by HydroSHED and a two-dimensional inundation model uses 90m one, which is easily developed for
different catchments in all over the world. The model shows high applicability in Japanese
catchments, however, the applicability is not assured in various catchments with different climate,
land use, topography, soil type, catchment scale, and so on. Our target is to analyze the applicability
of the distributed hydrologic model on different climate and land use conditions and to examine a
proper hydrologic process to be included in a distributed hydrologic model depending on various
hydrologic conditions.