書誌事項
- タイトル別名
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- Functional models correlating antecedent precipitation indices to bedrock groundwater levels
- サンタイキ イワナイブ ノ チカ スイイ ヘンドウ オ カイセキ スル タメ ノ ジッコウ ウリョウ ニ モトズク カンスウ モデル
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Bedrock groundwater is reported to be one of the main factors governing occurrences of deep landslides. Hence, predictions of bedrock groundwater level (BGL) changes caused by rainwater infiltration are essential for assessments of the landslide vulnerability as well as for establishments of evacuation systems. This study proposed four simple functional models which correlate antecedent precipitation indices (APIs) to BGLs. Li1 and Li2 models assume linear relationships between BGLs and APIs, and Pw1 and Pw2 models employ power functions. While Li1 and Pw1 models use an API with a single half-life time (HLT), Li2 and Pw2 models use two APIs with two different HLTs. Performances of the models were examined by using BGLs observed at 8 boreholes excavated at a steep hillslope underlain by weathered granitic bedrocks. Results showed that Pw2 model was the best for reproducing BGLs observed at the 5 boreholes. Pw1 and Li1 models were selected to be the best for 2 and 1 boreholes, respectively. Optimized HLTs, which were much longer than the ordinary values used for predictions of shallow landslides and debris flows, properly represented groundwater dynamics of the studied hillslope.
収録刊行物
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- Journal of the Japan Society of Erosion Control Engineering
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Journal of the Japan Society of Erosion Control Engineering 66 (4), 21-32, 2013
公益社団法人 砂防学会
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詳細情報 詳細情報について
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- CRID
- 1390001205479950592
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- NII論文ID
- 40019881204
- 130005111362
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- NII書誌ID
- AN0012035X
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- ISSN
- 21874654
- 02868385
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- NDL書誌ID
- 025028637
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
- KAKEN
- Crossref
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- 抄録ライセンスフラグ
- 使用不可