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- Material Type
- 規格・テクニカルリポート類
- Author/Editor
- 井尻 裕二小野 誠杉原 豊下茂 道人山本 肇文村 賢一
- Publication Date
- 2003-03
- Publication Date (W3CDTF)
- 2003
- Alternative Title
- Hydrogeological Modeling and Groundwater Flow Analyses of the Underground Research Laboratory Site Using the Various Conceptual Model
- Periodical title
- JNC TJ7400 2004-003
- Target Audience
- 一般
- Note (General)
- 出版タイプ: NA本研究では,水理地質構造のモデル化手法および地下水流動解析手法に起因した地下水流動解析結果の不確実性を評価することを目的として,連続体モデル3手法と不連続体モデル1手法の計4手法を用いて超深地層研究所建設用地を中心とした約9km四方の領域を対象とした3次元地下水流動解析を実施した。得られた知見は,以下に示すとおりである。解析領域,月吉断層の形状は同設定として,その他諸条件を含めたモデル化の違いが移行経路に及ぼす影響を評価した。その結果,移行経路や経路長に関しては,場所によってはモデル間の差よりも不均質性に起因したばらつきの方が大きいことがあることがわかった。また,移行経路や経路長よりも移行時間におけるモデル間の差が大きいことから,実流速の算定に用いる有効間隙率の不確実性が大きいことがわかった。また,本研究の一連のモデル化・解析作業を通じて,既存のデータフローの見直しを行なった。その結果,モデル化概念によってデータフローが異なることから,今後も引き続き調査と評価の結果をデータフローに反映していく必要があることがわかった。This study involves evaluation of uncertainty in hydrogeological modeling and groundwater flow analysis. Three-dimensional groundwater flow analisys in underground research laboratory site in Tono was carried out using three continuum models and one discontinuum model in the domain of 9km$\times$9km area. The acquired knowledge is as follows.The effect of variety of modeling method was evaluated under the condition that same analysis domain and same shape of Tsukiyoshi fault were assingned. The results indicated that the variation of travel pathway and travel length resulted from heterogeneity is sometimes larger than from the difference of models, depending on a place. Besides, since the difference between the models in travel time was larger than a travel pathway and travel length, it turns out that the uncertainty of effective porosity used for alculation of the actual flow velocity is large.Moreover, the existing data flow was reconstituted through a series of modeling and analysis of this work. The results indicated that it is necessary to continue reflecting the results of investigation and evaluation in data flow, since data flow varied with modeling concepts.
- Source
- /JNC-TJ7400-2004-003.pdf (fulltext)