Modification of a Pore-channel Analog Theory for Water Flow through Unsaturated Porous Media

In this paper, a mathematical development for a pore-channel analog theory which relates water flow to the moisture content in unsaturated porous media is studied and modified. As a hysteresis occurs which means measured values of water retention at given suction are different, depending on whether the soil is on a wetting or drying cycle, the analog theory was tested and firmly supported by the results of a treatment of water application especially in a drying cycle conducted on samples of a loamy sand and a silty clay loam.

關鍵字

Porous media ； Soil water content ； Hydraulic conductivity ； Water application rate

並列摘要

本文研討有關未飽和孔隙介質中水流與水分含量關係的孔隙管道模擬理論之數學推演，並予改進。因土壤有滯後（Hysteresis）現象，卽在濕潤與乾燥週期產生不同水分含量之測值，所推演的模擬理論經使用壤質砂土及粉質壤土試樣選在乾燥週期予以施灌處理實驗，已證明可行。

並列關鍵字

孔隙介質；土壤含水量；導水係數；施灌率

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