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題名 | 壓力鍋排水試驗張力平衡時間之研究=A Study of Equilibrium Timing for Draining in Pressureplate Experiment |
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作者姓名(中文) | 林俐玲; 洪靖惠; 蔡義誌; | 書刊名 | 水土保持學報 |
卷期 | 40:4 2008.12[民97.12] |
頁次 | 頁493-503 |
分類號 | 434.222 |
關鍵詞 | 水分特性曲線; 壓力鍋試驗; 飽和水分含量; Van Genuchten model; Water characteristic curve; Pressureplate experiment; Saturated water content; |
語文 | 中文(Chinese) |
中文摘要 | 壓力鍋排水試驗為傳統且常用之實驗,為量測土壤水分特性之方法,雖然需要較長的時間及繁複的實驗過程,但卻是最直接且實際測得方法之一,近年發展許多新的實驗儀器量測或間接以數值推估水分特性之方法,但排水試驗法之結果仍常用來作為驗證及討論的依據。本研究之目的為探討室內壓力鍋排水試驗,在不同時間開鍋之每個壓力勢能,所測得水分特性曲線之差異,探討一天和三天開鍋間距對土壤水分平衡的影響。本實驗分別施做1/3bar、1bar、2bar、4bar、8bar、12bar等壓力,測得其水分含量,進而求得水分特性曲線。研究結果顯示土壤因質地不同,會有不同的平衡時間。而以三天開鍋時間,繪出的水分特性曲線表現較一天的趨於平衡狀態。 |
英文摘要 | Using pressureplate experiment to measure soil water properties is conventional and common, even if its measurement is expensive, time consuming, and labor intensive. However, it is the most directly measure method. Recently many new experimental apparatus and models in order to predict soil water properties were developed. But pressureplate experiment still is a familiar method used to test and verify the predicted results. The objective of this study was to compare the water characteristic curves measured by pressureplate experiment in different time, namely 1 day and 3 days.The water contents were measured at 1/3, 1, 2, 4, 8, 12bar for soil to obtian water characteristic curves. The result shows that soil water content could not achive balance when measure in 1 day. The water characteristic curves in 3 days are better then 1 day. |
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