Incident rainfall partitioning and canopy interception modeling for an abandoned Japanese cypress stand

Sun, Xinchao; Onda, Yuichi; Kato, Hiroaki

doi:10.1007/s10310-013-0421-2

Cited by 40 publications

(43 citation statements)

References 42 publications

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“…Canopy cover ( c ), which directly determines the area from which intercepted rainwater evaporates into the atmosphere, was the most influential parameter in the prediction of interception loss in this study. This result is in accordance with the results of Limousin et al () and Sun et al (), but disagrees with the findings of Deguchi et al (). As canopy cover increases, more rainwater is intercepted rather than diverted into throughfall.…”

Section: Discussionsupporting

confidence: 74%

Modelling interception loss using the revised Gash model: a case study in a mixed evergreen and deciduous broadleaved forest in China

Zhao

et al. 2016

Ecohydrology

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Interception loss accounts for a substantial portion of incident precipitation and evapotranspiration in forest ecosystems. Hence, identifying its magnitude is crucial for our understanding of biogeochemical cycling and related hydrological processes. In this study, gross rainfall partitioning into interception loss, throughfall and stemflow were measured and modelled using the revised Gash model for a mixed evergreen and deciduous broadleaved forest over the 2014 growing season. Field survey results revealed that interception loss accounted for 14.3% of gross rainfall, while understory rainfall was 84.8% throughfall and 0.9% stemflow. The revised Gash model produced a fairly good agreement between observed and estimated rainfall partitioning. The model underestimated interception loss by only 6.6%, while throughfall and stemflow were also slightly misestimated. Hence the interception loss predictions from the model were robust and reliable for this mixed evergreen and deciduous broadleaved forest. As quantified by the model, the vast majority of interception loss occurred as evaporation from the canopy under saturated conditions: 54.9% evaporated during rainfall events, and 38.3% after rainfall ceased. The sensitivity analysis indicated that predictions from the revised Gash model were most affected by changes in canopy storage capacity (S), followed by the mean evaporation rate (Ē) during rainfall events, the mean rainfall rate ( trueR¯) and last canopy cover (c). Model predictions were least sensitive to trunk parameters (St and pt). Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Discussionsupporting

confidence: 74%

Modelling interception loss using the revised Gash model: a case study in a mixed evergreen and deciduous broadleaved forest in China

Zhao

et al. 2016

Ecohydrology

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“…Previous studies have concluded that interception is linearly related to the P g amount, and the linear fitting equation varies site to site (Saito et al, 2013;Soto-Schonherr & Iroume, 2016;Staelens et al, 2008;Su, Zhao, Xu, & Xie, 2016;Sun, Onda, & Kato, 2014). Besides the P g amount, the rain rate, which is the ratio of P g amount to rainfall hours, also impacts the interception loss (Cuartas et al, 2007;Zhang et al, 2016).…”

Section: Factors Impacting the Interception Loss Algorithmsmentioning

confidence: 99%

Global canopy rainfall interception loss derived from satellite earth observations

Zheng

2020

Ecohydrology

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Information on global canopy rainfall interception loss is essential for understanding the dynamics of land surface processes and the water cycle. In addition, large uncertainty remains regarding the global variation in this factor. The development of satellite earth observations has provided a great opportunity for the estimation of global rainfall interception loss to reveal the spatiotemporal variations. In the current study, the analytical Gash model was adapted and applied to estimate global rainfall interception loss from 2001 to 2015 on the basis of satellite remote‐sensing products, for example, gross rainfall amount and rate and leaf area index. The Dalton‐type equation was adopted to estimate the wet canopy evaporation rate in the revised Gash model. The estimation on the basis of the Dalton‐type equation showed better agreement with the ground observations than the classical Penman–Monteith equation in terms of estimated rainfall interception loss and its ratio to gross rainfall. Large spatial variations in global rainfall interception loss were found, and high values appeared in the regions with dense vegetation cover and high gross rainfall amounts, for example, tropical rainforests, whereas high rainfall interception to gross rainfall ratios occurred in the regions with low rain rates and high vegetation cover. This study constitutes a significant step forward in understanding global hydrological cycle on the basis of earth observation products.

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“…The understory vegetation was sparse and included Gleichenia japonica, Cleyera japonica, and Ardisia japonica. Information about the canopy water budget and components of evapotranspiration at this site were reported by Sun et al (2014b) and Sun et al (2014a), respectively, and the vertical root density profile (i.e. the total length of root within a unit volume of the soil) was investigated by Kimura (2012).…”

Section: Study Sitementioning

confidence: 99%

Comparing root water uptake profile estimations from an isotope-calibrated mechanistic model and a mixing model

Yamanaka

Kimura

Sun

et al. 2017

Hydrological Research Letters

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Abstract:The root water uptake profile (RWUP) reflects a plant's survival strategy and controls evapotranspiration and carbon fluxes. Despite its importance, there is still no reliable method for reconstructing this profile. In this study, we applied and compared two possible approaches to a case study in a conifer plantation: an isotope-calibrated mechanistic model and a mixing model with a bell-shaped approximation. Our results show that, after calibrating the hydrologically-active root density profile, the mechanistic model gave a good estimation of the xylem water isotope delta (δ x ); even though the measured root density was greater in shallower soils, water uptake occurred throughout the entire soil profile, with more uptake in deeper soils. The RWUPs estimated by the mixing model were different from those estimated by the mechanistic model and were unrealistic. However, when we constrained the minimum thickness of the water uptake zone, there was good agreement between the RWUPs from the two approaches. We can therefore conclude that the mechanistic model calibrated with isotopes gave better results, and that sole use of the mixing model is not recommended unless appropriate constraints are applied.

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Incident rainfall partitioning and canopy interception modeling for an abandoned Japanese cypress stand

Cited by 40 publications

References 42 publications

Modelling interception loss using the revised Gash model: a case study in a mixed evergreen and deciduous broadleaved forest in China

Modelling interception loss using the revised Gash model: a case study in a mixed evergreen and deciduous broadleaved forest in China

Global canopy rainfall interception loss derived from satellite earth observations

Comparing root water uptake profile estimations from an isotope-calibrated mechanistic model and a mixing model

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