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一维饱和与非饱和水动力弥散的实验研究

Experimental investigation of one-dimensional hydrodynamic dispersion in saturated and unsaturated soils

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【作者】 杨金忠

【Author】 Yang Jinzhong(Wuhan Institute of Hydraulic and Electric Engineering)

【机构】 武汉水利电力学院

【摘要】 本文通过室内对中壤土及轻壤土饱和、非饱和水动力弥散实验,认为对实验土样不动水体是存在的,在描述弥散过程的数学模型中应考虑不动水体的作用。根据一维饱和弥散实验结果,由相应的解析解,用单纯形法反求了参数;对于一维非饱和弥散实验,提出了一种求解水动力弥散方程的数值方法,并用试算法反求了实验土样的弥散参数。

【Abstract】 Experiments on hydrodynamic dispersion in saturated and unsaturated soils were conducted. It is shown that there exists immobile water for the experimental soils. The immobile water fraction should be taken into account in the hydrodynamic dispersion equation. A numerical model has been proposed for the solution of one-dimensional unsaturated dispersion equation. The numerical model is shown to be very effective. Dispersion coefficients are obtained from the experimental results.

  • 【文献出处】 水利学报 ,Journal of Hydraulic Engineering , 编辑部邮箱 ,1986年03期
  • 【被引频次】81
  • 【下载频次】696
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