截至目前為止孔隙介質流場還是相當複雜不易被理解，本文主旨在發展孔隙介質間水流視速度之影像分析法，文中首先就既往孔隙流視速度量測方法與限制作一回顧，進而提出適於孔隙介質流之質心演算法與峰前追蹤法兩種數位影像分析技術，本實驗記錄影像空間尺度為 ，每隔0.0333秒記錄一次，對應實際空間解析視速度精度為1.575 mm，經測試結果，採用峰前追蹤之固定時距法分析可快速且獲得良好之解析度。

　　本文所用分析程式為運用matlab程式語言指令，經老師與學長指導下編寫而成，與實測滲流量比較差異極小，與水壓計壓差所測之流速值作比較，在Re<10，Darcy律適用範圍內相當吻合，驗證此分析方法可用於砂箱視速度之量測法。運用此技術，可解得試驗平面地下水流動砂箱模型視速度分佈狀況，實驗中亦顯示在砂箱之近入出口區域Darcy律是不適用的，在近出口區域特徵長度為d50計算之無因次參數Re已大於10與前人之見解相符。

　　The flow in the porous media has still been difficult to understand so far. This thesis is to develop a method by using image analysis technique to measure the apparent velocity in the porous media. In the article, we first look back on the method and restriction of apparent velocity measurement on the flow in porous media, which have been published by the investigator and thus we can develop a suitable image analysis technique on the flow in the porous media, which are two kinds of image analytic technique, that is the front trace algorithm and the center of mass trace algorithm.

　　In this experiment the record image resolution is 480(H) by 720(V) pixels, and the record frequence is 30 Hz. The transformation of physics coordinate resolution is 1.575 mm. As a result of the experiment, we use control timing front trace algorithm calculation, which can quickly obtain an excellent result.

　　In this article we use analytic program is to use programming language matlab edited under the instruction of teachers and study brothers . it is approximate to permeate , and compare with the velocity measured by the difference of pressure in the piezometer ,which Re < 10, Darcy in suitable range, and proves that the analytic approach can be used in the measurement of apparent velocity in the sand box. By using this technique, we can solar of groundwater .On this experiment , it also shows that it is not suitable in the entrance and exit of sand box. Near the area of the exit Re is over 10 when characteristic length use d50.

1.沈茂松，「實用土壤力學試驗」，台北文笙書局，臺灣，1994。
2.施國欽，「大地工程學」，文笙書局，臺灣，2000。
3.莊鎮嘉，鄭錦聰， 「MATLAB程式設計進階篇」，全華科技股份有限公司，臺灣，2004。
4.黃安斌，「大地工程原理」，臺灣東華書局股份有限公司，臺灣，2000。
5.黃忠良，「多孔材料學」，復漢出版社印行，臺灣，2000。
6.張智星，「MATLAB 程式設計」，清蔚科技股份有限公司，臺灣，2004。
7.缪紹綱，「數位影像處理」，普林斯頓國際有限公司，臺灣，2003。
8.Adler, Pierre M., “Porous Media Geometry and Transports”, Butterworth-Heinemann Series in Chemical Engineering, U.S.A., 1992.
9.Bear, Jacob, “Dynamics of fluids in porous media”, American Elsevier Publishing Company , USA, 1972.
10.Bear, Jacob and M. Yavuz Corapcioglu, “Transport Processes in Porous Media”, Kluwer Academic Publishers.,U.S.A.,1989.
11.Boer, R. de, “Theory of Porous Media, Highlights in Historical Development and Current State”, Sprin-Verlag, Germany, 2000.
12.Bourbië, Thierry, Olivier Coussy and Bernard Zinszner, “Acoustics of Porous Media”, Ëditions Technip, France, 1987.
13.Braja, M. Das., “Principles of Geotechnical Engineering”, Thomson Learning TM, USA, 2002.
14.Ingham, Derek B. and Iaon Pop., “Transport Phenomena in Porous Media”, Pwegamon, UK, 1998.
15.Douglas, Jim, Jr. and U. Hornung, “Flow in Porous Media”, Germany, 1993.
16.Khorchani, Mohamed and O. Blanpain, “Free surface measurement of flow over side weirs using the video monitoring concept”, Flow Measurement and Instrumentation, SDOS, Vo1.15, Issue: 2, pp. 111-117, 2004
17.Munson, Bruce Roy, Donald F. Young, Theodore H. Okiishi., “Fundamentals of Fluid Mechanics”, John Wiley & Sons, 2002.
18.Muskat, M., R. D. Wyckoff “The Flow of Homogeneous Fluids Through Porous Media”, Edwards, New York, 1946
19.Loni, M. Peurrung, Mehdi Rashidi, and Thomas J. Kulp, “Measurement of porous medium velocity fields and their volumetric averaging characteristics using particle tracking velocimetry”, Chemical Engineering Science, SDOS, Vo1.50, NO.14, pp. 2243-2253, 1995.
20.Vafai, K., “Handbook of Porous Media”, Marcel Dekker, U.S.A., 2000.
21.Wooding, R. A., “Convection in a Saturated porous medium at large Rayleigh number or Péclet number”, Applied Mathematics Laboratory, D.S.I.R., NewZealand, 1962.