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Uncertainty in soil physical data at river basin scale – a review

机译：流域尺度上土壤物理数据的不确定性回顾

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摘要

For hydrological modelling studies at the river basin scale, decision makersneed guidance in assessing the implications of uncertain data used bymodellers as an input to modelling tools. Simulated solute transport throughthe unsaturated zone is associated with uncertainty due to spatialvariability of soil hydraulic properties and derived hydraulic modelparameters. In general for modelling studies at the river basin scalespatially available data at various scales must be aggregated to anappropriate scale. Estimating soil properties at unsampled points by meansof geostatistical techniques require reliable information on the spatialstructure of soil data. In this paper this information is assessed byreviewing current developments in the field of soil physical datauncertainty and adopting a classification system. Then spatial variabilityand structure is inspected by reviewing experimental work on determiningspatial length scales for soil physical (and soil chemical) data. Availableliterature on spatial length scales for soil physical- and chemicalproperties is reviewed and their use in facilitating change of spatialsupport discussed. Uncertainty associated to the derivation of hydraulicproperties from soil physical properties in this context is also discussed.
机译：对于流域规模的水文建模研究，决策者需要指导者评估建模者使用的不确定数据作为建模工具的输入的含义。由于土壤水力特性和导出的水力模型参数的空间变化，模拟的溶质通过非饱和带的运输与不确定性有关。通常，对于流域规模的模型研究，必须将各种规模的空间可用数据汇总到适当的规模。利用地统计技术估算未采样点的土壤特性需要有关土壤数据空间结构的可靠信息。本文通过回顾土壤物理数据不确定性领域的最新进展并采用分类系统来评估这些信息。然后，通过审查确定土壤物理（和土壤化学）数据的空间长度尺度的实验工作，检查空间变异性和结构。审查了土壤物理和化学性质的空间长度尺度上的可用文献，并讨论了它们在促进空间支持变化中的用途。在这种情况下，还讨论了与从土壤物理性质推导水力性质相关的不确定性。

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