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標題: Interaction of Gravel Content between Saturated Hydraulic Conductivity and Macropore in Sand
作者: 王琮元
Tsung-Yuan Wang
關鍵字: 礫石體積百分含量;粗孔隙;粗孔比;Volume percentage of gravel;Macroporosity;The ratio of macroporosity to total porosity fr
引用: 中文部分 1. 林俐玲、董小萍 (1996),土壤物理學實習手冊,國立中興大學水土保持學系。 2. 吳嘉俊、王建涵、詹于婷 (2012),礫石地之土壤水分入滲特性研究,中華水土保持學報(43)1。 3. 行政院農委會林務局自然保育網 (2012),哈盆自然保留區,行政院農委會林務局自然保育網。 4. 陳克強 (2009),土壤礫石含量及分布對飽和水力傳導度之影響,國立中興大學水土保持研究所碩士論文。 5. 郭魁士 (1983) 土壤學,中國書局。 6. 黃懿慈 (2005),礫石含量影響土壤飽和水力傳導度之研究。國立中興大學水土保持研究所碩士論文。 7. 蔡義誌 (2001),坡地單一土層與複合土層水力傳導度之研究。國立中興大學水土保持研究所碩士論文。 8. 萬鑫森 (1968),土壤水分及移動,水土保持學報,(1)1。 9. 萬鑫森 譯 (1987),基礎土壤物理學,初版二印,國立編譯館主編,茂昌圖書有限公司發行。 西文部分 1. Ahuja, L. R., J. W. Naney, P. E. Green, and D. R. Nielsen (1984). Macroporosity to Characterize Spatial Variability of Hydraulic Conductivity and Effects of Land Management.. Soil. Sci. Soc. Am. J., 48, 699-702. 2. Dunn, A. J. and G. R. Meguys (1984), Relationship Between Gravel Content of Soils and Saturated Hydraulic Conductivity in Laboratory Tests. ,SSSA Special Publication No.13 50 3. Darcy, H (1856), Les Fontaines Publigue de la ville de Dijon Dalmont, Paris 4. Gee, G. W., and D. Or. (2002). Particle-size analysis. P.255-293. In J.H. Dane and G. C. Topp (ed.) Methods of Soil Analysis. Part 4. SSSA Book Series No. 5. SSSA, Madison, WI. 5. Hillel, D. (1980). Fundamentals Academic Press. 6. Klute, A., and C. Dirksen.(1986) Hydraulic Conductivity and Diffusivity:Laboratory Methods. In:A. Klute(Ed.) , Methods of Soil Analysis. Part1. Monograph 9. American Society of Agronomy, Madison, WI. 7. Luo, L. F, H. Lin and J. Schmidt. (2010) Quantitative Relationship between Soil Macropore Characteristics and Preferential Flow and Transport. Soil. Sci. Soc. Am. J. , Vol:74 Num:6 8. Mbagwu, J. S. C. (1995), Saturated Hydraulic Conductivity in Relation to Physical Properties of Soils in the Nsukka Plains, Southeastern Nigeria. Geoderma. 65:56-66 9. Mehuys, G. R., L. H. Stolzy, J. Letey, and L. V. Weeks. (1975). Effect of Stones on the Hydraulic Conductivity of Relatively Dry Desert Soils. Soil Sci. Soc. Am. Proc., 39, 37-42. 10. Miller, F. T., and R. L. Guthrie. (1984) Classification and Distribution of Soils Containing Rock Fragments in the United States. In : Erosion and Productivity of Soils Containing Rock Fragments, Soil Sci. Soc. Am Special Publication No.13, Ch.1:1-6 11. Oliviera, I. B., and A. H. Demond, and A. Salehzadeh. (1996), Packing of Sands for the Production of Homogeneous Porous Media. Soil Sci. Soc. Am. J. 60:49-53. 12. Soil Survey Staff (1951) ,Soil Survey Manual .USDA Soil Conserv. Serv. Agric. Handbook. no. 18. U.S. Government Printing Office, Washington, D.C. 503p

使用的礫石含量介於 0%-50% 飽和水力傳導度採用定水頭實驗,,並且利用壓力鍋排水實驗計算土體中粗孔隙體積(macro pores)。

實驗結果顯示,隨著礫石含量的增加,飽和水力傳導度也隨之增加。而實驗中亦發現飽和水力傳導度與粗孔隙度與總孔隙度之比值,'粗孔比 fr',呈正相關。


本研究另外分析砂質壤土與坋質壤土,發現砂質壤土與砂土在礫石體積百分含量與飽和水力傳導度之間有相同的趨勢;而坋質壤土則是礫石體積含量增加,水力傳導度反而下降。推測其原因為細質地土壤其細孔隙較多,故礫石填入時對 fr 的影響不大,而礫石增加曲折度變大,通水面積減少,所造成的影響較 fr 大,導致水力傳導度下降。

In natural condition, there are gravel content in the soil. The saturated hydraulic conductivity between the homogeneous soil and heterogeneous soil are quite different. Sand samples with different gravel content were chosen as the experiment materials in this research. The saturated hydraulic conductivity of different treatment was measured.

The gravel volume content in this research was between 5%-50%. The saturated hydraulic conductivity was measured in constant head condition. The macropore parameters in samples were measured by draining in prssureplate drainage apparatus experiment.

The results indicated that, the saturated hydraulic conductivity would increase with the increased gravel amount. During the draining in pressureplate experiment, we found that the saturated hydraulic conductivity is positively correlated with 'the ratio of macroporosity to total porosity, fr '

This research also analyzed the saturated hydraulic conductivity of sandy loam and silty loam. Sandy loam showed the same trend with sand soil. However, the silty loam showed that when the gravel content increased , the saturated hydraulic conductivity decreased .We speculate that the fine-textured soil has more minor porosity , so the fr increased slightly. Higher gravel content resulted in higher tortuosity. The effect of tortuosity is stronger than fr in fine-textured soil. Therefore, the saturated hydraulic conductivity decreased.
其他識別: U0005-2605201513180300
Rights: 同意授權瀏覽/列印電子全文服務,2015-07-15起公開。
Appears in Collections:水土保持學系

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