Environmental assessments of aquifer storage and recovery for decentralized wastewater management

分散式废水管理的含水层储存和恢复的环境评估

• 批准号: 21F21787
• 负责人: 徳永 朋祥
• 金额: $ 1.47万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-09-28 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21F21787/
• 关键词: Urban flood; Drywell; Numerical modeling; drywell; aquifer recharge; urban runoff

During FY2022, we utilized an integrated surface-subsurface flow modeling approach to evaluate the effectiveness of drywells in reducing urban runoff at a catchment scale. A 3D model with HydroGeoSphere was developed, characterizing a synthetic unconfined aquifer covered by a layer of low-permeability materials. Sensitivity analyses of parameters such as land surface conditions, aquifer properties, drywell designs, and rainfall conditions were performed. Model results indicated that drywells are more effective in reducing runoff when the land surface has a higher Manning roughness coefficient or the aquifer material has a higher hydraulic conductivity. To achieve optimal performance, drywells should be situated beneath drainage routes that have high runoff flux. Increases in drywell radius or depth enhance the infiltration capacity, but deeper drywells can contaminate groundwater through infiltrating stormwater. Drywell performance declines with higher rainfall intensity, emphasizing the need for local rainfall intensity, duration, frequency (IDF) data to inform the design level of drywells in specific catchments

于2022财政年度，我们利用综合地表-地下水流模型方法评估干井在减少集水区城市径流方面的成效。利用HydroGeoSphere开发了一个三维模型，描述了一层低渗透材料覆盖的合成无压含水层。对地表条件、含水层特性、干井设计和降雨条件等参数进行了敏感性分析。模型结果表明，当地表具有较高的曼宁粗糙度系数或含水层材料具有较高的水力传导系数时，干井更有效地减少径流。为了实现最佳性能，干井应位于具有高径流通量的排水路线下方。干井半径或深度的增加可增强渗透能力，但更深的干井可通过渗透雨水污染地下水。干井性能随着降雨强度的增加而下降，强调需要当地降雨强度、持续时间、频率（IDF）数据，以告知特定集水区干井的设计水平

项目成果

Evaluating drywells for urban flood management using coupled surface-subsurface flow models

使用地表-地下流耦合模型评估城市防洪干井

• 发表时间: 2022
• 作者: Liu;J.;Brunner;P.;Fukushi;K.;Tokunaga;T.
• 通讯作者: T.

Modeling seawater flooding, ponding, and infiltration processes under future tsunami scenarios: A case study at Niijima Island, Japan.

模拟未来海啸情景下的海水淹没、积水和渗透过程：日本新岛的案例研究。

• 发表时间: 2022
• 作者: Liu;J.;Brunner;P.;Tokunaga;T.
• 通讯作者: T.

Estimating freshwater lens volume in highly permeable aquifers

估计高渗透性含水层中的淡水透镜体体积

• DOI: 10.3178/hrl.16.12
• 发表时间: 2022
• 期刊: Hydrological Research Letters
• 影响因子: 1.1
• 作者: Tajima Satoshi;Liu Jiaqi;Tokunaga Tomochika
• 通讯作者: Tokunaga Tomochika

Impacts of Subsurface Dam Construction on Downstream Groundwater Levels and Salinity in Coastal Aquifers

• DOI: 10.1111/gwat.13304
• 发表时间: 2023-03
• 期刊: Groundwater
• 影响因子: 2.6
• 作者: Jiaqi Liu;P. Brunner;T. Tokunaga

University of Neuchatel(スイス)

纳沙泰尔大学（瑞士）