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   水动力弥散系数 在 地质学 分类中 的翻译结果: 查询用时:0.729秒
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水动力弥散系数
相关语句
  hydrodynamic dispersion coefficient
    Based on the Karhunen-Loeve expansion and polynomial chaos expansion(KLPC),a model for conditional simulation of groundwater flow under the condition of spatial variable precipitation is established. The variation of standard deviation of pressure head,velocity and hydrodynamic dispersion coefficient is analyzed when observed precipitation data are taken into account.
    建立了降雨空间变异条件下基于KLPC解法的潜水运动条件模拟方法,假设平面上若干测点的降雨量已知,分析了当随机模型中加入雨量站观测值时水头、流速和水动力弥散系数标准差的变化情况。
短句来源
    The variability of the pressure head,velocity and hydrodynamic dispersion coefficient obtained from conditional simulation are smaller than those obtained from unconditional simulation.
    条件模拟方法计算出的水头、流速和水动力弥散系数的标准差要小于非条件模拟的结果;
短句来源
  hydrodynamic dispersion coefficient
    Based on the Karhunen-Loeve expansion and polynomial chaos expansion(KLPC),a model for conditional simulation of groundwater flow under the condition of spatial variable precipitation is established. The variation of standard deviation of pressure head,velocity and hydrodynamic dispersion coefficient is analyzed when observed precipitation data are taken into account.
    建立了降雨空间变异条件下基于KLPC解法的潜水运动条件模拟方法,假设平面上若干测点的降雨量已知,分析了当随机模型中加入雨量站观测值时水头、流速和水动力弥散系数标准差的变化情况。
短句来源
    The variability of the pressure head,velocity and hydrodynamic dispersion coefficient obtained from conditional simulation are smaller than those obtained from unconditional simulation.
    条件模拟方法计算出的水头、流速和水动力弥散系数的标准差要小于非条件模拟的结果;
短句来源
  “水动力弥散系数”译为未确定词的双语例句
    STUDY OF DYNAMIC DIFFUSION COEFFICIENTS OF SOIL MOISTURE
    土壤水动力弥散系数研究
短句来源
    To test the reliability of the method in practices,pressure transitivity and hydrodynamic dispersion coefficients are computed for two cases. The result shows that the method to determine parameters by approximating erfc (x) is accurate.
    为验证该方法在实际求参中的可靠性 ,通过两个实例 ,用erfc(x)近似公式计算了压力传导系数和水动力弥散系数 ,计算结果表明该方法的精确性和实用性
短句来源
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  hydrodynamic dispersion coefficient
Dye concentrations obtained by means of an image processing method are used in conjunction with an analytical solution to identify the hydrodynamic dispersion coefficient that governs the advective-dispersive transport problem.
      
  hydrodynamic dispersion coefficient
Dye concentrations obtained by means of an image processing method are used in conjunction with an analytical solution to identify the hydrodynamic dispersion coefficient that governs the advective-dispersive transport problem.
      


The study of hydrodynamic dispersion coefficients of soil moisture are summarized and the mothods used to compute the coefficients are discussed. According to the results achieved abroad, some opions on the application of models are putforward.

本文概述了国内外水动力弥散系数的研究情况,并对其计算方法加以评述,结合国外最新研究成果,提出模型应用的几点看法。随着农业生产的发展和农业科学技术水平的提高,要求农田合理施肥,经济灌溉和有效预测、控制土壤盐碱化,防止农药,化肥及废水灌溉引起土壤和地下水污染,以及土壤溶质随地表径流迁移,引起水环境污染和土壤生产力降低,已成为当今世界普遍关注的问题。对此研究涉及到对土壤溶质的研究。对土壤溶质研究最广泛是利用数学模型,模拟土壤溶质运动,其水动力弥散系数是不可缺少的参数之一。水动力弥散系数由扩散系数和机械弥散系数组成。

Based on the derivation of erfc( x ) approximation,a new method is introduced to determine groundwater transport parameters in this paper.To test the reliability of the method in practices,pressure transitivity and hydrodynamic dispersion coefficients are computed for two cases.The result shows that the method to determine parameters by approximating erfc (x) is accurate.

推导了erfc(x)近似公式 ,引进了求解地下水运移参数的新方法 .为验证该方法在实际求参中的可靠性 ,通过两个实例 ,用erfc(x)近似公式计算了压力传导系数和水动力弥散系数 ,计算结果表明该方法的精确性和实用性

The influence of different textures of soils to the transportation law for fluorin in soils is studied. The results indicate that the coefficient of hydraulic dispersion and the retardation factor for fluorin in the soil with high clay content is greater than those with low clay content, and that the reaching time for the peak value of fluorin content when the NaF and NaCl added is later than that when NaF added only and the peak value is also lower. In the way of input solute the fluorin content when NaF added...

The influence of different textures of soils to the transportation law for fluorin in soils is studied. The results indicate that the coefficient of hydraulic dispersion and the retardation factor for fluorin in the soil with high clay content is greater than those with low clay content, and that the reaching time for the peak value of fluorin content when the NaF and NaCl added is later than that when NaF added only and the peak value is also lower. In the way of input solute the fluorin content when NaF added is greater that when sodium chloride added only.

采用垂直土柱易混置换法,就不同质地及不同的加溶质方式对氟在土中运移规律的影响进行了研究,结果表明:氟在黏粒含量高的土中的水动力弥散系数和阻滞因子均大于黏粒含量低的土,在溶质注入方式上,同时加NaF和NaCl混合液比单独加NaF溶液在浓度峰值到达时间上要来得慢些,浓度峰值也小,但在解吸过程中合加NaF溶液时淋出氟的浓度比单加溶液时要大。

 
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