應用熱反應試驗之反推估方法評估異質性含水層材料分佈;Combined thermal response test and tomography technique to estimate the properties distribution of a heterogeneous aquifer.

NCUIR > College of Earth Sciences > Graduate Institute of Applied Geology > Electronic Thesis & Dissertation > Item 987654321/96422

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Title:	應用熱反應試驗之反推估方法評估異質性含水層材料分佈;Combined thermal response test and tomography technique to estimate the properties distribution of a heterogeneous aquifer.
Authors:	張俼瑍;Chang, Yu-Huan
Contributors:	應用地質研究所
Keywords:	熱示蹤劑試驗;單井加熱試驗;異質性含水層;沿海含水層;地下水通量;FODTS;HYDRUS-2D;Thermal tracer tests;Single-well heating tests;Heterogeneous aquifers;Coastal aquifers;Groundwater flux;FODTS;HYDRUS-2D
Date:	2025-01-17
Issue Date:	2025-04-09 18:27:47 (UTC+8)
Publisher:	國立中央大學
Abstract:	近年因城市擴張、產業經濟發展活動增長和生活水平提高，使得社會對於相關資源需求量持續增加，應就其他資源進行有效評估及開發，如量化沿海含水層之可用水量做為銜接用水需求缺口之方案，可提供水資源開發計畫參考。對於電力需求而言，地熱能作為潛在方案提供了環保、經濟且高效的能源生產方式，因此有效且準確的調查水力及熱傳導性質至關重要，透過應用最新技術使我們能夠在空間和時間上進行高解析度的溫度測量。本研究探討以熱示蹤劑技術量化含水層之地下水通量，以及利用溫度反應進行含水層參數分佈反推估，以室內試驗量化分析熱示蹤劑試驗影響範圍及效率，結果顯示當維持灌注溫度增加灌注率時，影響距離與增加幅度成正比，當維持灌注率增加灌注溫度時，影響範圍隨溫度越高其增加幅度逐漸遞減。在場址尺度試驗中，探討沿海含水層海淡水交互作用與潮汐變動特性，估算地下水通量在潮汐狀況由高位下降時地下水流量範圍為1.77至0.2 m/day，而潮汐狀況由低位上升則為0.25至0.02 m/day，以潮汐狀況由低位上升地下水通量平均為0.5 m/day，值得注意的是，垂直方向上的流量分佈差異很大，主要受到含水層材料的控制。;In recent years, urban expansion, increased industrial economic activities, and improved living standards have led to a continuous rise in the demand for related resources. Therefore, it is crucial to conduct effective assessments and develop alternative resources, such as quantifying the available water resources in coastal aquifers to bridge the gap in water demand, providing valuable references for water resource development plans. Regarding electricity demand, geothermal energy presents an environmentally friendly, economical, and efficient method for energy production. The efficiency of heat pumps varies with groundwater levels, temperature, water content, and the thermal transport properties of surrounding soil, making it essential to conduct effective and accurate investigations of hydraulic and thermal conductivity properties. Currently, most methods used for hydrogeological or geothermal environment investigations are unable to estimate features characterized by heterogeneity. The application of the latest technologies allows for high-resolution temperature measurements in both spatial and temporal dimensions, offering advantages for understanding the heterogeneity of porous media and the behavior of heat transfer. This study explores the use of thermal tracer technology to quantify groundwater flux in aquifers and to infer aquifer parameter distribution based on temperature responses. Additionally, laboratory experiments are conducted to quantitatively analyze the range of influence and efficiency of thermal tracer tests. The results indicate that maintaining increased injection temperatures correlates with an increased range of impact, while maintaining constant injection rates with increased injection temperatures leads to a gradually diminishing range of influence as temperatures rise. In site-scale tests, thermal tracer tests are employed to evaluate the stratified flux differences caused by the layered structure of coastal aquifers while investigating the interactions between freshwater and seawater and the characteristics of tidal fluctuations. When the tidal conditions rise from low to high, the average groundwater flux is estimated to be 0.5 m/day, with a range of 1.77 to 0.2 m/day during high tide to low tide conditions, and 0.25 to 0.02 m/day when conditions transition from low to high tide. Notably, the vertical distribution of flux shows significant differences, primarily controlled by the properties of the aquifer materials.
Appears in Collections:	[Graduate Institute of Applied Geology] Electronic Thesis & Dissertation

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