11:15 AM - 11:30 AM
[AHW22-09] Discussing the advantages and challenges of cross-catchment application of hydrological models —— Take Yodo River and Yamato River as an example
Keywords:Osaka Bay, phosphorus discharge, model extension, localization, Soil & Water Assessment Tool
In the study of water environment, hydrological models occupy a large proportion, especially in the topics of environmental dynamic assessment and sustainability assessment. There are many advantages and assistance to using hydrological models to study the sustainability and resilience of hydro-environments. However, the most complex process of establishing a high-precision hydrological model is the calibration of the model, which not only requires rich experience of the user but also hardware equipment and software support with powerful computing capabilities.
Osaka Bay is a part of the Seto Inland Sea, and t here have two large rivers connected to Osaka Bay, Yamato River and Yodo River, which catchment covers an area of 1077 km2 and 8240km2, respectively. Two rivers straddling six prefectures, Osaka, Nara, Kyoto, Shiga, Mie, and Hyogo, have very important geographic and economic value for Kansai region.
If a high-precision model that has been fully calibrated can be substituted into another watershed and adjusted according to the information of the specific watershed, can it be easier to obtain more reliable results and reduce the cost of calibration work. Under this background, this study tried to establish a phosphorus transport model for the Yodo River based on the Yamato River phosphorus budget model created using Soil and Water Assessment Tool, obtained a reliable simulation results with modifying localized information.This study demonstrates the potential for cross-catchment application of hydrological models.
Osaka Bay is a part of the Seto Inland Sea, and t here have two large rivers connected to Osaka Bay, Yamato River and Yodo River, which catchment covers an area of 1077 km2 and 8240km2, respectively. Two rivers straddling six prefectures, Osaka, Nara, Kyoto, Shiga, Mie, and Hyogo, have very important geographic and economic value for Kansai region.
If a high-precision model that has been fully calibrated can be substituted into another watershed and adjusted according to the information of the specific watershed, can it be easier to obtain more reliable results and reduce the cost of calibration work. Under this background, this study tried to establish a phosphorus transport model for the Yodo River based on the Yamato River phosphorus budget model created using Soil and Water Assessment Tool, obtained a reliable simulation results with modifying localized information.This study demonstrates the potential for cross-catchment application of hydrological models.