| DC 欄位 |
值 |
語言 |
| DC.contributor | 土木工程學系 | zh_TW |
| DC.creator | 黃鈺涵 | zh_TW |
| DC.creator | Yu-Han Huang | en_US |
| dc.date.accessioned | 2008-7-24T07:39:07Z | |
| dc.date.available | 2008-7-24T07:39:07Z | |
| dc.date.issued | 2008 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=953202044 | |
| dc.contributor.department | 土木工程學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 本文主要以理論及實驗探討定水頭狀態下，土壤入滲於水平面與坡面實際入滲情況之差異。本文之理論分析是假設坡面入滲符合一維Green-Ampt方程式，入滲方向為與坡面垂直之方向，此方向為入滲初期主要受毛細力影響時之方向，因此透過理論式可了解主要受毛細力主導之時期。
為配合Green-Ampt方程式之入滲性質(均質性且等向性)，本研究採用Hele-Shaw模型實驗，且Hele-Shaw模型濕鋒內為飽和液體，可清楚判別及量測飽和濕鋒曲線；本文也針對實際土壤入滲情況做砂箱實驗，採用台灣九號砂來進行實驗，透過實驗不但能了解入滲變化過程，更可以與理論式之適用性做探討。
由實驗結果得知理論式之適用範圍為初期之入滲部分，對於長時間 入滲較不適用，因為入滲一段時間後會逐漸受到重力效應之影響，使得入滲方向偏移至重力方向，因此定義一參數式加以判別入滲受重力影響顯著之時期。 | zh_TW |
| dc.description.abstract | The infiltration processes across both the horizontal plane and the sloping surface under ponding condition are experimentally examined in this study. The Green-Ampt equation proposed by Chen and Young(2006) is compared with experimental data.. In one-dimensional case, infiltration along the normal direction is mainly controlled by capillary forces.
A Hele-Shaw model was established, which satisfies the condition of homogeneous and isotropic for the Green-Ampt assumption. The saturated wetting front depth can be measured with the Hele-Shaw model approach. On the other hand, a sand-box experiment was established to observe real infiltration cases. According to the experimental data, the Green-Ampt model is only applicable at the beginning stage. The deviations between Green-Ampt model and experimental results become obvious afterwards due to gravitational effect. A dimensionless parameter define the time factor between the influence of capillary force and the gravity is proposed in this study. | en_US |
| DC.subject | 濕鋒 | zh_TW |
| DC.subject | 重力 | zh_TW |
| DC.subject | 毛細力 | zh_TW |
| DC.subject | Green-Ampt方程式 | zh_TW |
| DC.subject | 入滲 | zh_TW |
| DC.subject | Green-Ampt equation | en_US |
| DC.subject | Infiltration | en_US |
| DC.subject | Capillary force | en_US |
| DC.title | 定水頭坡面入滲之實驗研究 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | An experimental study of ponding infiltration on sloping surface | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |