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以空間內插法分析土壤沖蝕性指數之研究 PowerPoint PPT Presentation


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以空間內插法分析土壤沖蝕性指數之研究. 學生 : 李文櫻 指導教授 : 林俐玲 2013/12/16. 大綱. 台灣地區山勢陡峻、水流湍急,經人為開發破壞之後,土壤沖蝕之情形甚為嚴重。土壤一旦受到沖蝕,不僅地表直接受到破壞,也致使養分流失、土地生產力下降;而大量土壤經由水的攜帶,經常造成水庫、河道淤塞 等 許多災害。為有效瞭解土壤沖蝕產生的影響, 對於土壤沖蝕之量測預估與控制便成為目前研究的重要課題。 國內目前最常使用的沖蝕預估模式為通用土壤流失公式 (USLE, Universal Soil Loss Equation) 。.

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以空間內插法分析土壤沖蝕性指數之研究

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2013/12/16


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  • (USLE, Universal Soil Loss Equation)


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  • soil erodibility factorKm22.13m91996


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  • GPS

  • K


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Universal Soil Loss Equation , USLE

  • Wischmeier and Smith(1978)***** A RKLSCP


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  • WischmeierJohnson and Cross (1971)(nomograph)K(parameters)K(1)(=0.002-0.1mm)(2)(=0.1-2.0mm)(3)(4)(5)

Km (Soil Erodibility)


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(SCS1978)


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  • (1981,1983)K(K<0.2)(K=0.20.4)(K>0.4)

  • (1986)K13787

  • (1989)


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(Geostatistics)


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  • 1.(1994)

  • 2.Muge(1992)

  • 3.(1990)


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  • 4.Yost R.S(1982)CaMgK

  • 5.(1)Jeffery(1993)(2)(1998)


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  • 6.KrigingK(1)(1997)Kriging(K)(2)(1998) KrigingKKKK(3)(2000) KrigingK(4)(2008) KUSDATorri Wischmeier


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  • 12-26202,200mm-2,800mm

  • 1353,529


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  • (50)

  • 4010


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(50)

40

10


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  • (Kriging)

  • (stochastic)(deterministic)(1)(2)(dift)(structure)(3)


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THE END

Thanks for your listening


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