Influence of a hedge surrounding bottomland on seasonal soil‐water movement

Caubel, Virginie; Grimaldi, C.; Mérot, Philippe; Grimaldi, Michel

doi:10.1002/hyp.1214

Cited by 25 publications

(27 citation statements)

References 22 publications

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“…Two other important results from this work were to quantify the soil-water balance below the hedgerow and confirm the hypothesis in Caubel et al (2003) that hedgerow-tree transpiration exerts a strong impact not only on water content within the vadose zone but also on the water-table profile along the transect (Figure 6). In the simulation, most of the water taken up by trees came from lateral shallow ground water flow, since the model computed that direct infiltration corresponded to 20% of total input.…”

Section: Discussionsupporting

confidence: 79%

“…It is assumed that this depression is due to a relatively low soil hydraulic conductivity and that in more conductive soils watertable depletion would not be observed. One consequence of this depression will be a delay in soil rewetting when infiltration starts to increase during early autumn, which in turn could potentially delay the return of lateral ground water flow from the hillslope to the riparian zone (Caubel et al, 2003). Lastly, results depend on climate, and differences in AET due to tree presence actually increase during the driest times of the year (Aussenac, 2000;Viaud et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

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Simulating soil‐water movement under a hedgerow surrounding a bottomland reveals the importance of transpiration in water balance

Thomas

Molénat

Caubel³

et al. 2007

Hydrological Processes

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The objective of this study was to quantify components of the water balance related to root-water uptake in the soil below a hedgerow. At this local scale, a two-dimensional (2D) flow domain in the x-z plane 6 m long and 1*55 m deep was considered. An attempt was made to estimate transpiration using a simulation model. The SWMS-2D model was modified and used to simulate temporally and spatially heterogeneous boundary conditions. A function with a variable spatial distribution of root-water uptake was considered, and model calibration was performed by adjusting this root-water uptake distribution. Observed data from a previous field study were compared against model predictions. During the validation step, satisfactory agreement was obtained, as the difference between observed and modelled pressure head values was less than 50 cm for 80% of the study data. Hedge transpiration capacity is a significant component of soil-water balance in the summer, when predicted transpiration reaches about 5*6 mm day−1. One of the most important findings is that hedge transpiration is nearly twice that of a forest canopy. In addition, soil-water content is significantly different whether downslope or upslope depending on the root-water uptake. The high transpiration rate was mainly due to the presence of a shallow water table below the hedgerow trees. Soil-water content was not a limiting factor for transpiration in this context, as it could be in one with a much deeper water table. Hedgerow tree transpiration exerts a strong impact not only on water content within the vadose zone but also on the water-table profile along the transect. Results obtained at the local scale reveal that the global impact of hedges at the catchment scale has been underestimated in the past. Transpiration rate exerts a major influence on water balance at both the seasonal and annual scales for watersheds with a dense network of hedgerow

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Simulating soil‐water movement under a hedgerow surrounding a bottomland reveals the importance of transpiration in water balance

Thomas

Molénat

Caubel³

et al. 2007

Hydrological Processes

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“…These studies increase knowledge of hedgerow hydrological functions and their interaction with the environment, which can be used, for instance, to include hedgerows in hydrological distributed models (Viaud et al , 2005). Soil water movement under bottomland hedgerows have been studied in temperate climates (Caubel et al , 2003; Ghazavi et al , 2008). The effect on soil rewetting delay was observed but the difference on soil moisture due to meteorological conditions was not yet addressed.…”

Section: Introductionmentioning

confidence: 99%

Soil water movement under a bottomland hedgerow during contrasting meteorological conditions

Ghazavi

Thomas

Hamon

et al. 2010

Hydrological Processes

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"Linear vegetation structures such as hedge tree networks (hedgerows), shelterbelts, and isolated trees play a major role on soil water transfer. Our objective is to evaluate the influence of a bottomland hedgerow on water flux in the saturated and unsaturated zones. Soil water movement was investigated in a hillslope crossed by a hedgerow using total water-potential gradients and shallow groundwater dynamics. Results of a dry year were presented by Ghazavi et al. (2008). In this study, we analyse a wet year and then compare the two contrasting years (dry and wet). During the 2 years, the soil located at the vicinity of the hedgerow developed a drier status than the surrounding soils. Water flux in the unsaturated zone was directed towards the hedgerow for a longer period during the dry year than the wet year. The duration of delayed rewetting of the soil decreased from 3 months for the dry year to 1 month for the wet year. Variation in water storage calculated over the study period was highest near the hedgerow and lowest far from the hedgerow. In the hillslope studied, hedgerow and stream proximity controlled water transfer. It is clear that the hedgerow controlled water transfer in the unsaturated zone throughout the year, except for the period when the soil profile was fully saturated. First, hedgerows control water transfer by increasing lateral transfer, which is related to high soil water potential gradients in its vicinity. These processes may increase capillary rise and decrease groundwater recharge near the hedgerow. Second, reverse hydraulic gradient (upward flux of water) occurred during the period of lowest groundwater level, mainly because of groundwater and stream connectivity. Processes related to hedgerow presence, such as delayed soil rewetting and flow towards the hedgerow need to be considered to quantify the impact of linear vegetation structures on water flux.

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“…Hedges can also act as a barrier for other species and ecological processes (Schmitz et al, 2007). The role of hedges has been investigated throughout the world, especially as windbreaks, for limiting soil and water losses and for protecting adjacent croplands (Caubel et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Mediterranean species for hedges in solar photovoltaic farms: A four-year study.

2014

Global NEST Journal

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In an effort to reduce the environmental impact on the landscape caused by the installation of photovoltaic farms, Spanish legislation requires the establishment of a hedge on the perimeter of each plot. The objective of the work described here was to increase our knowledge of the hedge species that are best adapted to the soil and climatic conditions of Mediterranean areas. Six species were planted on the perimeter of a photovoltaic farm: Olea europeae var. sylvestris, Pistacea lentiscus, Pistacea terebinthus, Quercus coccifera, Quercus ilex and Retama sphaerocarpa. From 2009 to 2013 the survival percentages, apical growth, height and growth rate were studied for each species. Retama sphaerocarpa (91.7%), Pistacia lentiscus (83.3%) and Olea europaea var. sylvestris (70.8%) had the highest survival percentages at the end of the study period. In the same period, for those species that surpassed a survival percentage of 50%, the highest apical growths were shown by Retama Sphaerocarpa (37.04 cm), Pistacia lentiscus (26.4 cm) and Olea europaea var. sylvestris (25.8 cm), with average growth rate of 13.79 cm·year -1 , 7.60 cm·year -1 and 7.14 cm· year -1 , respectively. These three species are the best adapted to the conditions in Mediterranean areas for use as hedges.

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Influence of a hedge surrounding bottomland on seasonal soil‐water movement

Cited by 25 publications

References 22 publications

Simulating soil‐water movement under a hedgerow surrounding a bottomland reveals the importance of transpiration in water balance

Simulating soil‐water movement under a hedgerow surrounding a bottomland reveals the importance of transpiration in water balance

Soil water movement under a bottomland hedgerow during contrasting meteorological conditions

Mediterranean species for hedges in solar photovoltaic farms: A four-year study.

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