Sensing with boots and trousers — qualitative field observations of shallow soil moisture patterns
Sensing with boots and trousers — qualitative field observations of shallow soil moisture patterns
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用靴子和裤子进行传感——浅层土壤湿度模式的定性现场观察
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Seibert
中科院分区：
文献类型：
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作者：
M. Rinderer;A. Kollegger;B. Fischer;M. Stähli;J. Seibert
虽然土壤水分模式是研究与土壤-大气相互作用和土壤水分再分配的各种物理过程相关的流域时空异质性的有趣特征，但现有的许多捕捉空间模式的方法都很耗时、昂贵或需要特定地点的校准。在这项研究中，我们提出了一种快速、廉价的辅助野外分类方法，用于划分潮湿环境中的土壤湿度。这七个湿度等级是基于定性指标，人们可以在土壤表面触摸、听到或看到这些指标。为了反驳这样的定性方法受主观性影响很大的批评，我们通过对20名非专家评分者进行现场定性测量，对该方法进行了系统的测试。然后，我们根据一致性程度进行分析，并对照重力采样和时间域反射仪测量对结果进行评估。在所有分类中，70%的评分员同意分配给标记采样位置的湿度等级，在95%的等级中，他们没有偏离一个以上的湿度等级。七个定量湿度等级与重量法和时间域反射仪测量结果一致，尽管中等至潮湿等级显示其范围重叠，而最干燥等级显示出相当大的差异。尽管有一些优化方法的潜力，但它已被证明是对现有定量技术的可靠补充，用于评估潮湿环境中的土壤水分模式。版权所有©2012 John Wiley&Sons，Ltd.
While soil moisture patterns can be interesting traits to investigate spatio‐temporal heterogeneity of catchments relevant for various physical processes of soil–atmosphere interaction and soil water redistribution, many of the existing methods to capture spatial patterns are time consuming, expensive or need site‐specific calibration. In this study we present a quick and inexpensive supplementary field method for classifying soil wetness in wet environments. The seven wetness classes are based on qualitative indicators, which one can touch, hear or see on the soil surface. To counter critics that such qualitative methods are considerably affected by subjectivity, we performed systematic testing of the method by taking qualitative measurements in the field with 20 non‐expert raters. We then analyzed these in terms of degree of agreement and assessed the results against gravimetric sampling and time domain reflectometry measurements. In 70% of all classifications raters agreed on the wetness class assigned to the marked sampling locations and in 95% they were not off by more than one wetness class. The seven quantitative wetness classes agreed with gravimetric and time domain reflectometry measurements, although intermediate to wet classes showed an overlap of their range whereas the driest classes showed considerable spread. Despite some potential to optimize the method, it has been shown to be a reliable supplement to existing quantitative techniques for assessing soil moisture patterns in wet environments. Copyright © 2012 John Wiley & Sons, Ltd.
影响因子：
2.8
作者：
Bogena, H. R.;Herbst, M.;Vereecken, H.
通讯作者：
Vereecken, H.