Author(s): Daisuke Nohara; Yoshinobu Sato; Tetsuya Sumi
Linked Author(s): Yoshinobu Sato, Tetsuya Sumi, Daisuke Nohara
Keywords: Climate change water resources conflict analysis reservoir operation hydropower snow water supply
Abstract: This paper presents results of analysis on increasing pressure on water resources between water supply and hydropower generation in the Tedori River basin, a heavy snowfall basin in Japan, under a changing climate. The 150-year Continuous Climate Experiment data projected by Meteorological Research Institute of Japan Meteorological Agency with their high-resolution global circulation model MRI-AGCM3.2S was used for the climate scenario for 120 years from 1980 to 2099. Operation of reservoir systems for water supply and power generation were simulated to project future changes in water resources management by reservoirs considering streamflow prediction estimated from the climate experiment data by use of Hydro-BEAM, a distributed cell-grid type rainfall-runoff model. The results of analysis showed that alteration in river flow regime associated with change in snow processes may increase pressure in conflicting use of water in the river basin, and that water uses with subordinate water right may specifically be affected by decreased river flow after snowmelt season.
Year: 2025