| 土壤特性空间变异对降雨下渗影响的统计理论研究 |
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| 引用本文： | 李长兴,沈晋. 土壤特性空间变异对降雨下渗影响的统计理论研究[J]. 西安理工大学学报, 1990, 0(3) |
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| 作者姓名： | 李长兴 沈晋 |
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| 作者单位： | 陕西机械学院水利水电学院，陕西机械学院水利水电学院 |
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| 摘 要： | 本文利用饱和土壤导水率K_5的对数正态特性,通过函数转换方法建立了降雨下渗中积水时间f_p的分布和两个统计特征值(即平均下渗率及估计方差)的表达式。研究了土壤特性空间变异对降雨下渗的影响。结果表明,土壤特性空间变异程度越大,影响越大,在产流计算中如果不考虑这种影响,将会引起较大误差。
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| 关 键 词： | 下渗 空间变化 统计特征 |
Statistical Study of Effect of Spatial Variability of Soil Property on Rainfall Infiltration |
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| Li Changxing Shen Jin. Statistical Study of Effect of Spatial Variability of Soil Property on Rainfall Infiltration[J]. Journal of Xi'an University of Technology, 1990, 0(3) |
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| Authors: | Li Changxing Shen Jin |
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| Affiliation: | Li Changxing Shen Jin |
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| Abstract: | utilizing the Log-normal distribution of saturated conductivity Ks, the paper develops the distribution of ponding time tp and the formula of two statistical characteristics: mean and variance of infiltration rate in the process of rainfall infiltration by means of function transformation of stochastic variable, and studies the effect of spatial variability of soil property on rainfall infiltration. The conclusion is: the large the extent of spatial variability of soil variability, the large the degree of effect. If we do not consider this effect, the more error will be caused in calculation of watershed run off production. |
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| Keywords: | Infiltration spatial variability statistical characteristics |
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