对北京市污灌区非饱和土壤水扩散率及其影响因素进行了研究。

This paper discussed the unsaturated soil water diffusivity and its effect factors in waste water irrigation district in Beijing.

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铵态氮水平运移的浓度受非饱和土壤水扩散率的影响，并随非饱和土壤水扩散率的升高而呈幂函数曲线下降。

The concentration of ammonium nitrogen in horizontal migration decreased with the increase in unsaturated soil water diffusivity in power function.

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当土壤水吸力增大到一定值时，中间土层的土壤非饱和导水率反而大于底土层和表土层。

While the soil water suctions increased to some values, the unsaturated hydraulic conductivities in middle soil layers were higher than those in topsoil layers.

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