• 研究課題をさがす
  • 研究者をさがす
  • KAKENの使い方
  1. 課題ページに戻る

2021 年度 実績報告書

分散型水処理管理のための帯水層注水・揚水過程の環境影響評価

研究課題

研究課題/領域番号 21F21787
研究機関東京大学

研究代表者

徳永 朋祥  東京大学, 大学院新領域創成科学研究科, 教授 (70237072)

研究分担者 LIU JIAQI  東京大学, 新領域創成科学研究科, 外国人特別研究員
研究期間 (年度) 2021-09-28 – 2024-03-31
キーワードdrywell / aquifer recharge / urban runoff
研究実績の概要

During FY2021, a series of numerical simulations were conducted based on a conceptual unconfined aquifer to investigate the performance of drywells for aquifer recharge and flooding control in urban areas. Numerical simulations were conducted using a coupled surface-subsurface flow modeling approach. A modeling strategy was developed that could explicitly describe the drywell geometry in the model domain. Sensitivity analysis were conducted to explore to the effects of parameters including drywell designs (location, depth, radius, and number), aquifer properties (hydraulic conductivity and its heterogeneity), and rainfall patterns (intensity and duration). Results showed that installing drywells can enhance groundwater recharge and reduce urban runoff during heavy rainfall events. The infiltration capacity of drywells were found to depend on two factors, initial storage and infiltration, which can be affected by drywell designs and aquifer properties in different ways under different rainfall scenarios.

現在までの達成度 (区分)
現在までの達成度 (区分)

2: おおむね順調に進展している

理由

The numerical experiments conducted in FY2021 provided a fundamental understanding of drywell performance for enhancing aquifer recharge and mitigating urban runoff, which will benefit the design and data analysis of real-world case studies in the next research stage. The developed conceptual model will serve as a basis for integrating with reactive mass transport modeling in the next research stage.

今後の研究の推進方策

The research activities in FY2022 will focus on two targets:
(1) The coupled surface-subsurface flow model developed in FY2021 will be integrated with reactive mass transport modeling techniques in order to understand the impacts of drywells on groundwater quality and elaborate relevant hydrogeochemical processes.
(2) The developed numerical modeling strategy based on the conceptual aquifer will be applied to a realistic field case, Koganei City, Japan, in order to assess the performance of installed drywells for aquifer recharge. Fieldwork will be conducted to install sensors in existing drywells and monitoring wells for collecting information on infiltration rate and groundwater level dynamics.

  • 研究成果

    (1件)

すべて その他

すべて 国際共同研究 (1件)

  • [国際共同研究] University of Neuchatel(スイス)

    • 国名
      スイス
    • 外国機関名
      University of Neuchatel

URL: 

公開日: 2022-12-28  

サービス概要 検索マニュアル よくある質問 お知らせ 利用規程 科研費による研究の帰属

Powered by NII kakenhi