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題 名 | Kinematic Wave Model of Subsurface Flow under Hillslope=坡地地下水流運動波模式之研究 |
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作 者 | 陳樹群; 巫仲明; | 書刊名 | Proceedings of the National Science Council : Part A, Physical Science and Engineering |
卷 期 | 21:5 1997.09[民86.09] |
頁 次 | 頁437-444 |
分類號 | 443.67 |
關鍵詞 | 坡地; 地下水; 流運動波模式; Kinematic wave model; Subsurface flow; Infiltration rate; Water table profile; Impervious layer; Retreated positive surge; |
語 文 | 英文(English) |
中文摘要 | 本研究係在入滲量隨時間變化之條件下, 利用運動波模式來求算地下水流之水文 現象。當補注量變化時,地下水位與流量亦隨時間與空間而變,本模式經由數學理論之建構 ,可合理解釋自然之物理現象。位於地下不透水層上之運動波與坡地表面運動波之行為不同 ,在於地下水運動波為直線型,因此其波速與地下水位高低無關,且當入滲率隨時間減低時 ,會產生地下水面向下游退落傳遞之特性正波。 同時本研究亦發現,所有運動波在 X 方向 (τ≦ 0 )所發出的波,均只是平移的形式, 所以在極限特性波未傳至之前,不同位置所 觀測之流量歷線為重合之形式。 |
英文摘要 | In this study, we derive the kinematic wave model of subsurface flow with various infiltration rates; therefore, the unsteady water table and discharge hydrograph of the subsurface flow under varying recharge are simulated. The mathematical and physical implications of this new concept are thoroughly examined. During the traveling time of the kinematic wave of a subsurface flow, wave celerity is not a function of the water table profile; the characteristic curve becomes a straight line. This characteristic line is quite different from that of overland flow. As the infiltration rate decreases, the subsurface flow produces the retreated positive surges of a characteristic wave. The results of this study demonstrate that the waves of the kinematic wave model in the x-direction (τ≦ 0) are parallel in movement. Therefore, the flow lines at the different positions are coincident lines under the circumstance that a limiting characteristic wave does not appear. |
本系統中英文摘要資訊取自各篇刊載內容。