GeoHydraulics

Research Theme

1.Coupled solid–fluid interactive theory and numerical analysis
2.Earthquake hydrology investigation‚
3.Subsidence hazard analysis‚ and
4.Groundwater resources management.

1. Coupled solid-fluid interactive theory and numerical analysis

• Poroelastic theory - first proposed by Biot (1941)
     • A coupled theory
     • Describing the interactive behavior of solid and fluid phases
• Research background
     • Displacement and pore water pressure are the variables
     • Stochastic concept is introduced
          • First-order and Second-moment method (FOSM)
          • Monte Carlo simulation (MC)
     • Finite different method
     • Fortran program language
     • COMSOL Multiphysics, Abaqus

Applications for the study

• Subsidence analysis
     • Basic analysis
     • Application analysis
• Consolidation test inversion
• Mechanism for reversed groundwater level phenomena
• Groundwater level reverse phenomena mechanism
• Earthquake hydrology
     • Mechanism investigation
     • Soil liquefaction mechanism
• Disposal site investigation
     • Nuclear fuel waste disposal site assessment
     • Geothermal resources investigations
     • Carbon dioxide sequestration

Recent studies

• MOST project (2017-2020)
• 1st year: Conditioned stochastic poroelastic theory
• 2nd year: Multi-random variables model
• 3rd year: Field application • Further THM model (MOST project, 2021)
• Nonlinear stochastic THM model
• Boundary uncertainty on THM system • Tools: COMSOL Multiphysics, Intel Visual Fortran, Gslib

Publications

• Dynamic Interactions of Groundwater Flow and Soil Deformation in Randomly Heterogeneous Porous Media. (Journal of Hydrology)
• Estimating Poromechanical Properties Using a Nonlinear Poroelastic Model. (Journal of Geotechnical and Geoenvironmental Engineering)
• Dynamics of Deformation and Water Flow in Heterogeneous Porous Media and its Impact on Soil Properties. (Hydrological Processes)
• The Application of the First-Order Second-Moment Method to Analyze Poroelastic Problems in Heterogeneous Porous Media. (Journal of Hydrology)
• Stochastic Analysis of Coupled Thermal-Hydraulic-Mechanical Modeling for Nuclear Waste Repositories
• The study on stochastic thermal-hydraulic-mechanical coupled model for porous media with dependent parameters. (manuscript)

2. Earthquake hydrology investigation

• Earthquakes and water (earthquake hydrology)
• Earthquake will induce the pre-, co- and post-seismic groundwater level anomalies
• Hydrological variations triggering earthquakes
• One of the main targets is earthquake prediction -> How to define?
• The other main target is earthquake nucleation -> How to observe?

Recent Publications

• Estimating the extent of stress influence by using earthquake triggering groundwater level variations in Taiwan (Groundwater)
• Evaluation of Hydraulic Properties of Aquitards Using Earthquake-Triggered Groundwater Variation (Journal of Asian Earth Sciences)
• Observations and Mechanisms for the Variations of River Water and Multi-depth Groundwater Level Triggered by 2016 Taiwan Meinong Earthquake
• The pre-seismic phenomena between sea level and groundwater level variations in Hualien observation well

Further Studies

• The improvement of assessment of soil liquefaction potential
     • CGS project with NCKU
• Drilling and Observatory Plan for Milun fault
     • Academia Sinica – Project of Prof. Kuo-Fong Ma
• Earthquake event study
     • 2010.03.04 Jiashen Earthquake
     • 2016.02.06 Kaohsiung Meinong Earthquake
     • 2018.02.06 Hualien Earthquake
• 2015 Nantou earthquakes
     • Wuling observes groundwater temperature variations (pre-seismic)
• Hualien station analyses
     • A lot of groundwater level anomalies
• Tainan earthquake sequence
     • Blind faults??
• 2018 Hualien and Ilan anomalies in groundwater level? (pre-seismic)

3. Subsidence hazard analysis

• Groundwater over-pumping is the main factor which induces the land subsidence.
• Land subsidence is a main issue for groundwater resources management and public life problem.
• Terzaghi's consolidation theory and Biot's poroelastic theory.
• Does groundwater level decrease directly relate to land subsidence?

Recent Publications

• A Technique for Quantifying Groundwater Pumping and Land Subsidence Using a Nonlinear Stochastic Poroelastic Model (Environmental Earth Sciences)
• Combining Gray System and Poroelastic Models to Investigate Subsidence Problem in Tainan, Taiwan (Environmental Earth Sciences)
• Dimensional Upgrade Approach for Spatial-Temporal Fusion of Trend Series in Subsidence Evaluation (Entropy)
• Investigating the Mechanisms of Land Subsidence Due to Shallow Compaction and Deep displacement in Southwestern Taiwan

Further Studies

• How does geological model affect groundwater flow and land subsidence?
     • Geological model uncertainty - MOST Shackleton project
• Total land subsidence and groundwater decline induces the soil compaction
     • What are the main factors to induce land subsidence at different depths?
• Groundwater pumping and land subsidence
     • The assessment of land subsidence potential
     • An integral model to study groundwater flow, land subsidence, and seawater intrusion

4. Groundwater resources management

• Groundwater recharge and discharge balance
     • How to estimate the natural recharge?
     • How to enhance the natural and artificial recharge?
     • How to estimate the groundwater pumping quantity?
• Groundwater quantity and quality assessment
• Surface water and groundwater interactive problems
• Sustainable concept for groundwater management
• Tool: Groundwater Modeling System (GMS), Matlab

Recent Publications

• 濁水溪流域地下水資源開發與管理 (台灣水利)
• Evaluating the Climate Change Impact on Groundwater Recharge in Nine Groundwater Regions of Taiwan
• Donggang River hydrology and water quality investigation project
     • Cooperate with Sinotech Environmental Technology, Ltd
     • Field investigations and data collection
     • Project ended in 2018 and MOST support the 2019 hydrology
        measurement
• Meinong area groundwater recharge project
     • Cooperate with Blue Donggang River Conservation Association
     • Hydrology data analysis and recharge assessment
     • More social science survey
     • Project from 2018 to 2019
• Hsinkailiao groundwater contaminant site project
     • Cooperate with Yushan Environmental Engineering Co., Ltd.
     • Groundwater flow and solute transport modeling
     • Project ended in 2018

Further Studies

• Groundwater resources management in Pingtung plain
     • Groundwater flow
     • Land subsidence
     • Seawater intrusion
     • Climate change influences
• Meinong groundwater management
     • Groundwater resources management
     • Groundwater recharge
     • Teaching plan for water resources management
• Donggang groundwater management
     • Surface water and groundwater interaction
     • Groundwater recharge reservoir

Other topics

• Groundwater and artificial intelligence (AI)
     • An undergraduate MOST project
     • Python language
     • Data rearrangement and data supplementation
     • Groundwater level simulation and prediction using rainfall and air temperature data
     • Groundwater resources assessment under the climate change effect
     • Earthquake hydrology application
• Publication: 以深度學習模型進行地下水位預測與抽水量推估 (農業工程學報)

Projects (*Principal Investigator)

1. 王士榮，濁水溪沖積扇地層下陷機制之研究與探討II(Investigations of land subsidence mechanism of Choushui River Alluvial Fan II)，國科會專題研究計畫，2025/08/01 ~ 2026/07/31。 (NSTC 114-2116-M-008-009) (主持人)
2. 王士榮，地熱開發對地下環境潛在影響之研究(Study on the potential impact of geothermal development on the underground environment)，國家環境研究院，2025/03/24 ~ 2025/12/31，業興環境科技股份有限公司合作。 (114FA031) (協同主持人)
3. 王士榮，114年低放射性廢棄物近地表處置申照階段安全評估案例研析(Analysis of Case on Safety Assessment in the Licensing Stage of Near-Surface Disposal of Low-Level Radioactive Waste)，核能安全委員會，2025/03/01 ~ 2025/12/31。(NSC11311081L)(主持人)
4. 王士榮，水文及地質異質性特徵分析與水文地質模型建立試驗(Analysis of hydrological and geological heterogeneity characteristics and experiment on establishing hydrogeological model)，台灣中油股份有限公司探採研究所計畫，2024/09/01-2025/08/31。 (FEA1316002)(主持人)
5. 王士榮，濁水溪沖積扇地層下陷機制之研究與探討(Investigations of land subsidence mechanism of Choushui River Alluvial Fan)，國科會專題研究計畫，2024/08/01 ~ 2025/07/31。 (NSTC 113-2116-M-008-005) (主持人)
6. 王士榮，非火山型區域水文及地熱儲集層模擬分析研究計畫(Groundwater hydrology and geothermal reservoir simulation and analysis in a non-volcanic region)，工業技術研究院綠能與環境研究所，2024/04/01 ~ 2024/11/30。 (主持人)
7. 王士榮，113年低放射性廢棄物淺地表處置安全管制之關鍵議題研析(Analysis on the issues of safety control for near surface disposal of low-level radioactive waste)，核能安全委員會，2024/2/27 ~ 2024/12/31。(NSC11301002L)(主持人)
8. 王士榮，構造作用下的地下水流機制：以西部重要地下水區邊界為例(Groundwater flow mechanism in tectonic area: an example on the boundary of groundwater region in west Taiwan)，中大工研院聯合研發中心計畫，2024/01/01 ~ 2024/12/31。 (主持人)
9. 王士榮，放射性廢棄物最終處置場址水化學作用對岩體裂隙之水-力耦合交互作用影響研究(Investigation of the influences of hydrochemistry on the rock fracture evolution in a coupled hydro-mechanical system in the final disposal site of radioactive waste)，國科會原子能科技學術合作研究計畫，2024/01/01 ~ 2024/12/31。 (NSTC 113-2623-E-008-003-NU) (主持人)
10. 王士榮，花蓮米崙斷層地下水整合觀測與斷層活動機制探討II(Integration of Groundwater Observation around Hualien Milun Fault and Mechanism Investigation of Fault and Fluid Interaction II)，國科會研究計畫，2023/08/01 ~ 2024/07/31。 (NSTC 112-2116-M-008-004) (主持人)
11. 王士榮，斗六丘陵與彰化臺地構造邊界地下水流模式之研究(Study on the groundwater flow pattern near the structural boundary around Douliu Hills and Changhua Tableland)，中大工研院聯合研發中心計畫，2023/01/01 ~ 2023/12/31。 (主持人)
12. 王士榮等人，112年低放射性廢棄物坑道處置環境與異向性審驗技術研析(Research and analysis on low-level radioactive waste disposal environment and anisotropy inspection technology in 112 year)，行政院原子能委員會放射性物料管理局，2023/02/23 ~ 2023/12/31。 (112FCMA002) (總主持人)
13. 王士榮等人，桃園海岸帶地下水出流潛能初步分析(Preliminary Potential Analyses of Submarine Groundwater Discharge in Taoyuan Coastal Area)，經濟部水利署水利規劃試驗所，2023/03/11 ~ 2023/12/08。(WRA112111) (主持人)
14. 王士榮，桃園永安海岸帶地下水出流初步調查(Preliminary Investigation of Submarine Groundwater Discharge in Yongan Coastal Area, Taoyuan)，經濟部水利署水利規劃試驗所，2023/11/07 ~ 2023/12/15。 (主持人)
15. 王士榮，花蓮米崙斷層地下水整合觀測與斷層活動機制探討，科技部研究計畫，2022/08/01 ~ 2023/07/31。 (MOST 111-2116-M-008-007) (主持人)
16. 王士榮等人，111年低放射性廢棄物坑道處置源項與工程審驗技術研析，行政院原子能委員會放射性物料管理局，2022/02/22-2022/12/31。 (111FCMA005) (主持人)
17. 許榮廷、王士榮等人，量化深層垂向變位影響因子及技術整合服務計畫，經濟部水利署，2022/1/26-2022/12/20。 (WRA1110346) (協同主持人)
18. 董家鈞、王士榮等人，地質與地層模型不確定性之量化及其應用之整合型研究，科技部卓越領航計畫，2021/08/01 ~ 2025/07/31。(MOST 110-2123-M-008-001) (協同主持人)
19. 王士榮，嘉南高屏地區地震引致地下水文特性變化研究(II)，科技部新進人員研究計畫，2021/08/01 ~ 2022/07/31。 (MOST 110-2116-M-008-003) (主持人)\
20. 王士榮，嘉南高屏地區地震引致地下水文特性變化研究，科技部新進人員研究計畫，2020/08/01 ~ 2021/07/31。 (MOST 109-2116-M-008-016) (主持人)
21. 莊長賢等人、王士榮，地質、工程與風險-跨學科之整合研究，科技部沙克爾頓計畫，2019/08/01 ~ 2021/07/31。(MOST 108-2638-E-008-001-MY2)(協同主持人)
22. 陳映涵、王士榮，地震波與水文地質特性對地下水文影響之研究-以2016美濃地震為例，科技部大專學生參與研究計畫，2020/07/01 ~ 2021/02/28。 (MOST 109-2813-C-008-041-M) (指導教授)
23. 地科院、王士榮，地科學院-學院型整合計畫-教學創新與推動，教育部高等教育深耕計畫，2020/01/01 ~ 2020/12/31。(共同主持人)
24. 王士榮，東港溪主流沿岸8口臨時地下水井之觀測，經濟部水利署南區水資源局，2020/01/13-2020/12/15。(計畫主持人)
25. 周克任、王士榮，高雄美濃地區地下水復育教育推廣計畫，經濟部水利署水利規劃試驗所，台灣藍色東港溪保育協會，2019/03/01 ~ 2020/08/31。 (共同主持人)
26. 王士榮，序率孔彈性理論之發展與地層下陷研究之應用，科技部新進人員研究計畫，2017/12/01 ~ 2020/07/31。 (MOST 106-2116-M-008-023-MY3) (主持人)
27. 地科院、王士榮，地科學院-學院型整合計畫，教育部高等教育深耕計畫，2019/01/01 ~ 2019/12/31。(共同主持人)
28. 王士榮，東港溪沿岸地下水文調查與分析，業興環境科技股份有限公司主持，2019/02/01 ~ 2019/12/15。 (共同主持人)
29. 邱正鈞、王士榮，深度學習模型在地下水位預測的應用，科技部大專學生參與研究計畫，2018/07/01 ~ 2019/02/28。 (MOST 107-2813-C-008-041-M) (指導教授)
30. 王士榮、倪春發，東港溪流域水文與水質監測計畫，經濟部水利署南區水資源局，2018/01/01 ~ 2018/12/15。 (MOEAWRA1070135) (主持人)
31. 王士榮，新開寮地區地下水污染場址模擬與分析，裕山環境工程股份有限公司，2018/04/01-2018/11/30。 (主持人)
32. 研發處、王士榮，新進/年輕教師學術研究補助，教育部，2017/11/15 ~ 2018/11/14。 (執行計畫)
33. 王士榮，大潮州人工湖補注對於東港溪流域水文及水質影響探討-東港溪流域調查資料彙集與分析，財團法人中興工程顧問社，2017/08/01 ~ 2018/01/31。 (主持人)
34. 地科院、王士榮，地科院整合型教學創新計畫，教育部，2017/01/01 ~ 2017/12/31。 (協助執行計畫)