山体地下水の存在様式とその水文地形とのかかわり

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  • Hydro-Geomorphologic Remarks on the Subsurface Water of the Mountain Body
  • サンタイ チカスイ ノ ソンザイ ヨウシキ ト ソノ スイモン チケイ ト ノ カカワリ

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<p>The writer states the organic thought related to the mountain body groundwater, discussing the hydrogeological characteristics of mountain body as a field of the hydrological process. Subsurface topography and buried geomorphologic features strongly affects the distribution and circulation of mountain body groundwater. Geological heterogeneity in a mountain body strongly affects to the mountain body-scale subsurface water-flow system. The generation of concentrated flow of subsurface flow is strongly related with the development of soil pipe which is controlled both by topological and geological condition. In addition, the development of soil pipe is very important as a subsurface geomorphologic process or as a cause of the degradation of the slope stability. The progressive processes related to piping phenomena are reviewed. Surface soil layer also plays important role in water supply to mountain body. On the other hand, the direct clarification of infiltration and recharge mechanisms is very difficult. Assessment of water balance, subsurface water potential and/or content and water quality supports to understand mountain-body groundwater movement. Finally the writer introduces the peculiar phenomena of the mountain body groundwater observed at Usu volcano and Mt. Takao-san.</p>

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