On topographic controls of soil hydraulic parameter scaling at hillslope scales
نویسندگان
چکیده
منابع مشابه
simultaneous scaling of soil water retention and hydraulic conductivity functions
abstract scaling methods, which are based on similar media theory, are used to simplify the statistic description of soil spatial variations. to simulate the water flow in heterogeneous soils, simultaneous scaling of soil hydraulic functions, including soil water retention and unsaturated hydraulic conductivity functions, is highly desirable. in the similar media theory, the simultaneous scalin...
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Robust estimation of soil moisture using microwave remote sensing depends on extensive ground sampling for calibration and validation of the data. Soil surface sealing is a frequent phenomenon in dry environments. It modulates soil moisture close to the soil surface and, thus, has the potential to affect the retrieval of soil moisture from microwave remote sensing and the validation of these da...
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Soil moisture gradients along hillslopes in humid watersheds, although indicated by vegetation gradients and by studies using models, have been difficult to confirm empirically. While soil properties and topographic features are the two general physiographic factors controlling soil moisture on hillslopes, studies have shown conflicting results regarding which factor is more important. The rela...
متن کاملscaling of soil hydraulic conductivity function using effective capillary drive
abstract to estimate spatial variability of soil hydraulic functions, scaling methods were developed and have been widely used. among these functions, physically based methods have been found more desirable because of possibility of estimating soil hydraulic functions from soil physical properties. in this paper, a new and physically based method has been described for scaling soil hydraulic co...
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Controls on hillslope ̄ow pathways are still not well understood, despite the many dierent studies reported since the pioneering work of Hewlett (1961). In a wide range of recent modelling studies it has been assumed that ̄ow directions can be related to hydraulic gradients derived from surface topography. This assumption leads to believable maps of predictions of soil saturation and is convenie...
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ژورنال
عنوان ژورنال: Water Resources Research
سال: 2012
ISSN: 0043-1397
DOI: 10.1029/2011wr011204