top of page
​​期刊論文

More Publications

Huang, Q. Z., Hilpert, M., Tsai, Y. Z., & Hsu, S. Y. (2023). Journal of Hydrology, 621, 129524.

The Green-Ampt model (GAM) is a widely used infiltration model. However its parameters seem velocity-dependent; moreover, we showed that the effective suction head is ponding-height-related.

2023_Investigation and parameterization of the ponding height effect on dynamic suction he

C.-W. Tsao,  Q.-Z. Huang,  C.-Y. You,   M. Hilpert, S.-Y. Hsu,* K. Lamorski,   L.-C. Change  and  C. Sławiński (2021) Lab on a Chip, 21(2), 385-396.

We developed a low-cost method for fabricating “soil-on-a-chip” micromodels with 2D and 2.5D pore structures by stacking layers made with a conventional low-cost tabletop CNC router followed by tape bonding. The pore structure was extracted from an X-ray micro-computed tomography scanning image of a medium-grain sandstone sample. The imbibition experiments performed in the 2D and 2.5D micromodels showed the trends of the residual saturation versus capillary number (Ca). The channels showed opposing trends for low-aspect-ratio 2D and high-aspect-ratio 2.5D micromodels. As the channel aspect ratio increased, the location of air entrapment changed from dead-end pores to transport pores. The sizes of trapped air bubbles in the transport pores decreased as the injection flow rates increased.

The effect of channel aspect ratio on air entrapment during imbibition in soil-on-a-chip micromodels with 2D and 2.5D pore structures

Graphical_abstract_The effect of channel aspect ratio on air entrapment during imbibition

Lo, W. C., Yang, C. C., Hsu, S. Y., Chen, C. H., Yeh, C. L., & Hilpert, M. (2017). Water Resources Research, 53(1), 712-725.

  • The first experimental investigation of the effects of acoustic vibrations on the water retention curve

  • The presence of acoustic vibrations affects the dynamic behavior of the water retention curve

  • The findings are linked to the pore-scale flow behaviors

​

​

wrcr22444-fig-0008-m.jpg
wrcr22444-fig-0001-m-The dynamic response of the water retention curve in unsaturated soil

Figure 8. Dynamic coefficients versus water saturation affected by acoustic excitations of various frequencies for a pumping rate of Q = 19.7 mL/s.

Chang, P. Y., Chang, L. C., Hsu, S. Y., Tsai, J. P., & Chen, W. F. (2017).
Journal of Applied Geophysics, 144, 134-143.

Highlights

  • We used the time-lapse ERI surveys to estimate the hydraulic parameters, K and Sy, in two sites.

  • We found that the hydraulic conductivity at Dajou is much larger than that of Pengtsuo.

  • The contribution that lateral flow made to the pumping discharge were also estimated with the data.

  • The fraction of lateral flow contribution is about 70% at the beginning of the pumping test at Dajou.

  • The fraction of storage yielding took about 100% at the beginning of the pumping at

    Pengtsuo

​Estimating the hydrogeological parameters of an unconfined aquifer with the time-lapse resistivity-imaging method during pumping tests: Case studies at the Pengtsuo and Dajou sites, Taiwan.

​Journal_of_applied_Geophysics.PNG
​實驗室尺度實驗/研究

Lab Scale Experiments/Studies

入滲儀.jpg

入滲儀

室外大型沙箱

comsol.png

數值模擬

利用數值模擬探討可能之現象，或驗證猜想等

2.PNG

砂箱-含水量計--張力計

室內沙箱

D09622003_QZH_presentation_110-2.png

微流道模型實驗

以微流道裝置(微模型)探討孔隙中水分可能特性與機制

現地尺度實驗/研究

Field Scale Experiments/Studies

1.jpg

​地電阻

量測通入地表下電流(直流電或低頻交流電)與相應的電壓變化推測地下的地電阻率分布。

292881.jpg

現地勘查

現地勘查係重要工作，用以了解概念模式與現實之異同、實驗可能遭遇之困難、現地特殊因子、實際需釐清之問題等。

202138_210308_11.jpg

水準儀-高程測量

高程測量

20210914_142513.jpg

田間入滲特性推估

以自製之定水頭裝置量測土壤入滲能力

124483.jpg

田間垂直​滲漏估計

以簡易設備估計田間垂直滲漏量

20230603_133634_edited.jpg

水下自計式水位計

水下溫-電導-壓力計，收集水井中水文資訊

bottom of page