Development and Application of Single-Parameter Soil Water Diffusivity Models for the Nanxiaohegou Basin

Development and Application of Single-Parameter Soil Water Diffusivity Models for the Nanxiaohegou Basin
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南小河沟盆地单参数土壤水扩散系数模型的建立与应用

DOI:
10.1061/(asce)he.1943-5584.0000792
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发表时间:
2014-02
影响因子:
2.4
通讯作者:
Li, Huaiyou
Li, Huaiyou
中科院分区:
工程技术4区
文献类型:
--
作者:
Song, Xiaoyu;Li, Huaiyou

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摘要预测土壤水分运动和污染物运移需要对土壤水力特性有很好的了解。土壤水分扩散率是非饱和土壤最重要的水力特性之一。然而,因为这个参数表现出显着的空间变化,监测土壤水扩散率在一个大面积的土地将需要采集大量的测量,以避免引入显着的错误。为解决这一问题,测定了南小河沟流域56个土样的土壤水分扩散率。然后,这些实验数据被用来推导单对数和双对数模型,用于预测土壤水分扩散率的盆地作为一个整体,并为特定的土壤和地形类型内的盆地。观察到单对数模型的两个参数之间存在线性关系,从而可以建立第三系列单参数模型。三种模式…
AbstractPredicting soil water movement and the transport of pollutants requires a good understanding of soil hydraulic properties. One of the most important hydraulic properties of unsaturated soil is the soil water diffusivity. However, because this parameter exhibits significant spatial variation, monitoring the soil water diffusivity over a large area of land would require the acquisition of an impractically large number of measurements in order to avoid introducing significant errors. To address this issue, the soil water diffusivity was measured in 56 soil samples gathered from across the Nanxiaohegou basin. These experimental data were then used to derive single- and double-logarithmic models for predicting the soil moisture diffusivity for the basin as a whole and for specific soil and terrain types within the basin. A linear relationship was observed between the two parameters of the single-logarithmic model, making it possible to establish a third series of single-parameter models. All three mode...
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