Rainfall interception by a Pinus sylvestris forest patch overgrown in a Mediterranean mountainous abandoned area I. Monitoring design and results down to the event scale

Llorens, Pilar; Poch, Ramon; Latron, Jérôme; Gallart, Francesc

doi:10.1016/s0022-1694(96)03334-3

Cited by 181 publications

(154 citation statements)

References 16 publications

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“…If we apply the bulk rainfall interception rates found in a similar nearby stand (24% of precipitation; Llorens et al, 1997), net rainfall amounts to only ca. 150 mm, and therefore fails to supply the amount of water transpired by the stand.…”

Section: Differences In Stand-level Transpiration Between Pinementioning

confidence: 99%

Transpiration of montane Pinus sylvestris L. and Quercus pubescens Willd. forest stands measured with sap flow sensors in NE Spain

Poyatos

Llorens

Gallart

2005

Hydrol. Earth Syst. Sci.

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Abstract. Stand transpiration was measured during the 2003 and 2004 growing seasons using heat dissipation sap flow sensors in a Scots pine (Pinus sylvestris L.) and a pubescent oak (Quercus pubescens Willd.) forests located in a montane area of the Eastern Pyrenees (NE Spain). The first aim of the study was to assess the differences in quantitative estimates of transpiration (E c ) and the response to evaporative demand of the two stands. Over the studied period of 2003, characterised by a severe drought episode during the summer, the oak stand E c was only 110 mm compared to the 239 mm transpired by the Scots pine stand, although the ratio of transpiration to reference evapotranspiration (E c /ET 0 ) in the oak stand compares well with the expected values predicted for low leaf area index (LAI) oak forests in southern Europe. Scots pine showed a strong reduction in E c /ET 0 as the drought developed, whereas pubescent oak was less affected by soil moisture deficits in the upper soil. As a second objective, and given the contrasting meteorological con-

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Section: Differences In Stand-level Transpiration Between Pinementioning

confidence: 99%

Transpiration of montane Pinus sylvestris L. and Quercus pubescens Willd. forest stands measured with sap flow sensors in NE Spain

Poyatos

Llorens

Gallart

2005

Hydrol. Earth Syst. Sci.

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“…Thus, the role of rainfall intensity in determining the maximum interception is still uncertain [46]. We argue that the relationship between maximum interception and sprinkling intensity depends on the range of intensity values, as suggested by a few other researchers [39,46,47]. Further study with a broader range of sprinkling intensities is needed in order to fully understand the mechanism of how rainfall intensity affects the maximum interception.…”

Section: Model Coefficientsmentioning

confidence: 81%

“…This suggests that how the rate of The value of k ranged from 1.49 to 23.93, tending to increase with the increase in sprinkling intensity and to decrease with the development of vegetative stages (Figure 4b). Previous results also demonstrated that under higher rainfall intensities it took less time to reach maximum interception by the canopy of forests [39,40] and shrubs [7]. The difference between the highest and lowest values of k was greater than that of I m , demonstrating that the rate of interception changed more drastically than did the maximum interception across different vegetative stages and sprinkling intensities.…”

Section: Model Coefficientsmentioning

confidence: 82%

A Rainfall Interception Model for Alfalfa Canopy under Simulated Sprinkler Irrigation

Jiao¹,

Su²,

Han³

et al. 2016

Water

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Estimating canopy interception of water by plants during rainfall or sprinkler irrigation is a critical step for evaluating water-use efficiency. Most existing experimental studies and mathematic models of canopy interception have paid little attention to the interception losses of water by herbaceous plants. To better understand the canopy interception processes of herbaceous plants and to estimate the interception losses, a process-based dynamic interception model for alfalfa canopy was developed and validated by an experiment under conditions of simulated sprinkler irrigation. The parameters of the model included the maximum interception, the rate of interception of the alfalfa canopy, and the duration of sprinkler irrigation. The model demonstrated that the amount of interception increased rapidly with duration in the early stage of sprinkler irrigation, and then gradually leveled off until the maximum retention capacity of the canopy was reached. The maximum interception by the alfalfa canopy, ranging from 0.29 to 1.26 mm, increased nonlinearly with the increase of leaf area index (LAI) and sprinkling intensity. The rate of interception increased with the decrease of LAI and the increase of sprinkling intensities. Meanwhile, a nonlinear equation based on sprinkling intensity and plant height was proposed in order to more practically estimate the maximum interception by alfalfa canopy.

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“…Rainfall interception on the plant surface is an important component of the hydrological cycle of the forest environment and depends, among others, on species-related characteristics of plants (leaf size and arrangement, bark roughness), weather conditions, rainfall amount and intensity as well as raindrop size (Herwitz 1985, Levia & Frost 2003, Levia & Herwitz 2005, Klamerus-Iwan 2014. The amount of water stored on the plant surface may reach from 6 to 50% of total rainfall (Liu 1997, Llorens et al 1997, Aboal et al 1999, Bryant et al 2005) and the key role in that process is played by the bark layer of trees (Herwitz 1985, Llorens & Gallart 2000.…”

Section: Introductionmentioning

confidence: 99%

Hygroscopicity of the bark of selected forest tree species

Ilek¹,

Kucza²,

Morkisz³

2017

iForest

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As the outer layer of trees and shrubs, bark is exposed to the direct action of atmospheric conditions and reacts to changes in relative air humidity. This study focuses on the actual hygroscopicity of the bark, regarded as a component of the total bark retention capability. The main research aims were to: (1) determine the physical properties (specific density, bulk density, total porosity), actual hygroscopicity and maximum water storage capacity of the stem bark at breast height (1.3 m) of eight forest tree species; (2) assess the relationship between bark actual hygroscopicity and its physical properties; (3) determine the share of the actual hygroscopicity of bark in its maximum water storage capacity. Significant differences were observed among the different species considered as a consequence of the variation in physical properties of their bark. Actual hygroscopicity of bark (expressed in balance units), i.e., the maximum water amount that can be absorbed from saturated air by the outer bark layer, showed a significant relationship with bark physical properties. Depending on tree species, actual hygroscopicity may constitute from 10 to 30% of the maximum water storage capacity of bark.

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Rainfall interception by a Pinus sylvestris forest patch overgrown in a Mediterranean mountainous abandoned area I. Monitoring design and results down to the event scale

Cited by 181 publications

References 16 publications

Transpiration of montane Pinus sylvestris L. and Quercus pubescens Willd. forest stands measured with sap flow sensors in NE Spain

Transpiration of montane Pinus sylvestris L. and Quercus pubescens Willd. forest stands measured with sap flow sensors in NE Spain

A Rainfall Interception Model for Alfalfa Canopy under Simulated Sprinkler Irrigation

Hygroscopicity of the bark of selected forest tree species

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