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姓名 孫渥鈞(Wo-jyun Sun)  查詢紙本館藏   畢業系所 應用地質研究所
論文名稱 含水層儲蓄效應對多深度微水試驗資料分析的影響
(Effect of Aquifer Storage on Data Analysis of Multilevel Slug Test)
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摘要(中) 多深度微水試驗(MLST)是在井中不同深度進行微水試驗,以獲得水力
傳導係數的垂直分布K(z)。由於MLST 的測試段長度小於含水層厚度,MLST 引起的地下水流為部分貫穿情況。扁平比(井半徑/測試段長度)和部分貫穿比(測試段長度/含水層厚度)會影響部分貫穿井附近的地下水流流場,但是以往討論含水層儲蓄效應時只提到扁平比的影響;當微水試驗中扁平比大於0.08 時受壓含水層的儲蓄效應可以忽略。本研究的目的為探討扁平比和部分貫穿比與含水層儲蓄效應的關係,並找出何種情況下含水層儲蓄效應可以忽略。同時利用暫態(考慮儲蓄效應)模式和類穩態(忽略儲蓄效應)模式於受壓和非受壓含水層中,並以暫態和類穩態模式進行比較,將比較結果區分為高滲透性和低滲透性,得出含水層儲蓄效應可以忽略(1)當高滲透性受壓含水層中部分貫穿比小於0.03 且扁平比小於5;(2)高滲透性非受壓含水層中扁平比小於5 且儲蓄效應的影響與部分貫穿比無關。對於低滲透
性含水層,無論是受壓或非受壓,儲蓄效應皆不可忽略,且儲蓄效應的影響與部分貫穿比無關。
摘要(英) The multilevel slug test (MLST) is to conduct a number of depth-specific slug tests at various depths in a well for the determination of the vertical distribution of hydraulic conductivity, K(z). The test length of each depth-specific slug test is set less than aquifer thickness, so the flow induced is under a partially penetrating condition. It is known that both the aspect ratio (well radius / the test
section length) and the partial penetration ratio (the test section length/ aquifer thickness) play important roles in affecting the flow field close to a partial penetrating well. However, only the aspect ratio has been taken into account when assessing the influence of aquifer storage for MLSTs; that is, aquifer storage can be neglected when the aspect ratio is larger than 0.08 for a slug test in a confined aquifer. Therefore, the purpose of this study is to evaluate the influence of the aspect ratio and the partial penetration ratio on the negligence of aquifer storage. A transient model with aquifer storage effect and a
quasi-steady-state model neglecting aquifer storage are developed for both the confined and unconfined aquifers. The comparison of these two models under high–K and low-K conditions reveals that aquifer storage can be neglected when (1) the aspect ratio is less than 5 and the partial penetration ratio is less than 0.03 in high-K confined aquifers, and (2) the partial penetration ratio is less than 5 in high-K confined aquifers, regardless of the aspect and partial penetration ratios.For either confined or unconfined aquifers of low-K condition, aquifer storage
can’t be neglected. regardless of the aspect and partial penetration ratios.
關鍵字(中) ★ 儲蓄效應
★ 多深度微水試驗
★ 暫態
★ 部分貫穿比
★ 扁平比
★ 類穩態
關鍵字(英) ★ trasient state
★ partial penetrating ratio
★ aspect ratio
★ storage effect
★ multilevel slug test
★ quasi-steady state
論文目次 摘要...................................................... i
Abstract ................................................ ii
謝誌 ...... ............................................ iii
圖目錄 .................................................. vi
符號定義 ................................................. x
第一章 序言 .............................................. 1
1.1 多深度微水試驗 ....................................... 1
1.2 類穩態模式發展 ....................................... 5
1.3 暫態模式發展 ......................................... 6
1.4 研究動機與目的 ....................................... 8
第二章 三維軸對稱暫態/類穩態模式 ........................ 10
2.1 三維軸對稱受壓暫態模式............................... 11
2.2.1 動量守恆方程式 .................................... 16
2.2 三維軸對稱非受壓暫態模式 ............................ 22
2.3 三維軸對稱受壓類穩態模式 ............................ 24
2.4 三維軸對稱非受壓類穩態模式 .......................... 26
第三章 三維軸對稱暫態/類穩態模式分析與比較 .............. 28
3.1 高滲透性含水層中儲蓄效應的影響 ...................... 29
3.1.1 受壓暫態模式儲蓄係數敏感度分析 .................... 29
3.1.2 非受壓暫態模式儲蓄係數敏感度分析 .................. 36
3.1.3 類穩態模式與暫態模式之比較 ........................ 43
3.2 低滲透性含水層中儲蓄效應的影響 ...................... 45
第四章 MLST 資料分析 .................................... 50
4.1 高滲透性含水層實驗資料分析 .......................... 51
4.2 低滲透性含水層實驗資料分析 .......................... 56
第五章 結論與建議 ....................................... 59
參考文獻 ................................................ 60
參考文獻 參考文獻
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指導教授 陳家詢(Chen Chia-shyun) 審核日期 2011-8-1
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