• 作者： 陳樹群; 巫仲明
• 作者服務機構： 國立中興大學水土保持學系
• 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 rechargeare 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 functionof the water table profile; the characteristic curve becomes a straight line. This characteristic line is quitedifferent from that of overland flow. As the infiltration rate decreases, the subsurface flow produces theretreated positive surges of a characteristic wave. The results of this study demonstrate that the wavesof the kinematic wave model in the x-direction are parallel in movement. Therefore, the flow linesat the different positions are coincident lines under the circumstance that a limiting characteristic wavedoes not appear.
• 中文關鍵字： Kinematic wave model; subsurface flow; infiltration rate; water table profile; impervious layer; retreated positive surge
• 英文關鍵字： --