The Delayed Runoff Hydrograph: a Possibility for Bedrock Groundwater Outflow

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  • ハイドログラフの比較による遅れた流出ピークと山体地下水の関連
  • ハイドログラフ ノ ヒカク ニ ヨル オクレタ リュウシュツ ピーク ト サンタイ チカスイ ノ カンレン

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<p>The relationship between bedrock subsurface flow and delayed runoff response was studied by several published papers. Two types of basin topography were found among the watersheds showing delayed runoff responses: 1) underlain by thick colluvium at the “source area” of the basins, having mostly gentle relief, and 2) steep sedimentary rock or fractured rock basins, where bedrock fracture flow may be dominant. The other type-2 response is the watershed underlain by limestone or similar rock types where bedrock flow should be dominant. These two types can be conventionally classified by the basin relief, but bedrock spring could exist in the colluvium in most watersheds. This reviewing work suggests that the mechanism for quick or mostly identical time runoff response to rain storm, which can be revealed by analyzing delayed type runoff response.</p>

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