17:15 〜 19:15
[AHW28-P04] Analysis of flow duration curves to evaluate the influence of climate change on runoff processes and the flow regime in the Japan Sea region
キーワード：Flow duration curve, Surface hydrology, Flow regime, Flow index, Climate change, Japan Sea region
Flow duration curves are valuable tools for analysing the hydrological regimes of rivers and identifying the impacts of climate change, especially those related to warming temperatures and changes to snowfall and seasonal snowpack. Climate change is having a significant impact on runoff processes and flow regimes in the heavy snow Japan Sea region. Changes in precipitation patterns also modify the flow regime of rivers, leading to variations in water flows and availability.
The objective of this research project is to evaluate the impacts of climate change on the annual and seasonal flow duration curves in the Japan Sea region. Basins evaluated include a pristine tributary of the Miomote River (Takiya River, 19.45 km2), and a major tributary of the Shinano River (Uono River, 1408 km2). Daily discharge records were used to construct annual and seasonal flow duration curves to confirm the role of different runoff processes in different seasons. Determination of stochastic flow duration curves and high, medium and low flow indices for the periods 1961-1990 and 1991-2023 made it possible to assess the impact of climate change on flow regimes.
Research on flow regimes and changes in snow melt runoff processes is essential for assessing the potential impact of climate change, and predicting periods of high, medium and low flow, which is beneficial for water resource management. This study offers a multitude of benefits for the sustainable management of water resources, providing essential information for risk prevention, ecosystem protection, and adaptation to environmental change. The use of flow duration curves also enables hydrological models to be calibrated and validated more effectively in order to improve management of river catchments in the Japan Sea region.
The objective of this research project is to evaluate the impacts of climate change on the annual and seasonal flow duration curves in the Japan Sea region. Basins evaluated include a pristine tributary of the Miomote River (Takiya River, 19.45 km2), and a major tributary of the Shinano River (Uono River, 1408 km2). Daily discharge records were used to construct annual and seasonal flow duration curves to confirm the role of different runoff processes in different seasons. Determination of stochastic flow duration curves and high, medium and low flow indices for the periods 1961-1990 and 1991-2023 made it possible to assess the impact of climate change on flow regimes.
Research on flow regimes and changes in snow melt runoff processes is essential for assessing the potential impact of climate change, and predicting periods of high, medium and low flow, which is beneficial for water resource management. This study offers a multitude of benefits for the sustainable management of water resources, providing essential information for risk prevention, ecosystem protection, and adaptation to environmental change. The use of flow duration curves also enables hydrological models to be calibrated and validated more effectively in order to improve management of river catchments in the Japan Sea region.