• HAYASHI Masaki
    Department of Geoscience, University of Calgary Federal Institute for Forest, Snow and Landscape Research (WSL)

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Other Title
  • 高山の水文地質学
  • 高山の水文地質学 : 世界の河川の源流を支える地下水の役割
  • コウザン ノ スイモン チシツガク : セカイ ノ カセン ノ ゲンリュウ オ ササエル チカスイ ノ ヤクワリ
  • The critical role of groundwater in sourcing the headwaters of the world
  • 世界の河川の源流を支える地下水の役割

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<p>Groundwater discharge in alpine headwaters sustains baseflow in rivers originating in worldʼs mountain ranges, which is critically important for aquatic habitats, run-of-river hydropower generation, and downstream water supply. Groundwater storage in alpine watersheds was long considered negligible, but recent field-based studies have shown that talus, moraine, and rock-glacier aquifers are common in many alpine regions of the world, although bedrock aquifers occur in some geological settings. Spatial extent and distribution of individual aquifers determine the groundwater storage-discharge characteristics in first- and second-order watersheds in the alpine zone, which in turn govern the baseflow characteristics of major rivers. Similar alpine landforms appear to have similar hydrogeological characteristics around the world, suggesting that a common conceptual framework can be used to understand alpine aquifers based on geological and geomorphological settings. Such a framework will be useful for parameterizing storage-discharge characteristics in large river hydrological models.</p>

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