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題 名 | 應用參數推估法推求互層坡地滲流之土壤水力特性函數=Determining Soil Hydraulic Properties of Layered Hillslope Flow by Parameter Estimation Algorithm |
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作 者 | 許榮庭; 劉長齡; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 11:2 1999.06[民88.06] |
頁 次 | 頁243-248 |
分類號 | 434.222 |
關鍵詞 | 參數推估; 坡地滲流; 土壤水力特性函數; Parameter estimation; Hillslope flow; Soil hydraulic property; |
語 文 | 中文(Chinese) |
中文摘要 | 本文利用有限元素法建立坡地滲流模式,並且利用結點疊代修正技巧模擬坡面滲流點位置。於進行坡地滲流計算上所需要之土壤水力函數。本文利用土壤水頭觀測值作為目標函數,以參數推估技巧推求之。為驗證模式之可靠度,本文採用Rulon等人[1]之砂箱模型試驗結果,以參數推估方法得到代表該試驗土壤之最佳土壤水力函數。利用最佳土壤水力函數模擬Rulon等人[1]試驗條件下之坡地滲流流況,並將本文計算結果、Rulon等人[1]試驗觀測值及UNSAT模式[2]計算結果互相比較,此結果顯示出本文對於水力傳導度之推估結果與實測值相當吻合,並且於坡面滲流量及自由水位面之計算結果也與觀測結果相當接近。 |
英文摘要 | This study uses the finite element method to build the hillslope flow model, and a nodal iteration scheme to calculate the locations of seepage points. In praticular, the observed potential head obtained from the seepage experiments is used to construct the objective function, taking advantage of parameter estimation algorithm to get optimal parameters in hydraulic property function. On model calibration, the sand tank test results of Rulon et al, are adopted, and the optimal solution of parameters for describing the test soil in sand tank is found. By using this optimal solution, the hillslope flow under the experimental conditions of Rulon et al., can be simulated. The computational results of this study are compared both with observations from sand tank test and the numerical results of UNSAT model. It is comfirmed that the potential head, seepage discharge and free surface obtained by the three different approaches are all close each other. |
本系統中英文摘要資訊取自各篇刊載內容。