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Supporting dune management by quantitative estimation of evapotranspiration

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Supporting dune management by quantitative estimation of evapotranspiration. / Samson, R; Provoost, Sam; Willaert, L; Lemeur, R.

In: Unknown Journal, 2005.

Onderzoeksoutput: Bijdrage aan tijdschriftA3: Artikel in een tijdschrift zonder peer review

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@article{058bd09323204cfda01143ee6b927cf3,
title = "Supporting dune management by quantitative estimation of evapotranspiration",
abstract = "Research was conducted in the nature reserve De Westhoek (B) in order to estimate the hydrological impact of shrub removal in favour of the recolonisation and development of herbaceous vegetation types in the dune slacks. Dune slacks are one of the most rare ecotopes in Europe. Therefore, the evapotranspiration of herbaceous and shrub vegetation types was estimated based on experimentally obtained data and modelling. Analysis of the experimentally obtained stomatal resistance values revealed that there was no difference in the minimal stomatal resistance values (in absence of any stress) between herbs and shrubs. Stomatal resistance was modelled based as a function of climatic variables. Maximal rooting depth was similar in both vegetation types, and was maximal 60cm. For both vegetation types more than 60{\%} of the roots were found in the upper 15cm. The mean leaf-area-index (LAI) of herbaceous and shrub vegetations is respectively 2.11±0.34 and 3.27±0.20 m2.m-2. Evapotranspiration of both vegetation types was modelled with a multi-layer dynamic vegetation model FORUG and seasonal evapotranspiration amounted roughly 200 and 550mm for the herbaceous and shrub vegetation types respectively. Although these estimates can be somewhat refined, from these results it can be concluded that shrub removal, and the replacement of this vegetation type by a herbaceous vegetation type, will not result in a lowering of the groundwater table. This knowledge can help managing hydrologically disturbed dune ecosystems.",
author = "R Samson and Sam Provoost and L Willaert and R Lemeur",
note = "Publication Authorstring : Samson, R.; Provoost, S.; Willaert, L.; Lemeur, R. Publication RefStringPartII : <b><i>in</i></b>: Herrier, J.-L. <i>et al.</i> (Ed.) (2005). <i>Proceedings 'Dunes and Estuaries 2005': International Conference on nature restoration practices in European coastal habitats, Koksijde, Belgium 19-23 September 2005. VLIZ Special Publication,</i> 19: pp. 345-354",
year = "2005",
language = "English",
journal = "Unknown Journal",

}

RIS

TY - JOUR

T1 - Supporting dune management by quantitative estimation of evapotranspiration

AU - Samson, R

AU - Provoost, Sam

AU - Willaert, L

AU - Lemeur, R

N1 - Publication Authorstring : Samson, R.; Provoost, S.; Willaert, L.; Lemeur, R. Publication RefStringPartII : <b><i>in</i></b>: Herrier, J.-L. <i>et al.</i> (Ed.) (2005). <i>Proceedings 'Dunes and Estuaries 2005': International Conference on nature restoration practices in European coastal habitats, Koksijde, Belgium 19-23 September 2005. VLIZ Special Publication,</i> 19: pp. 345-354

PY - 2005

Y1 - 2005

N2 - Research was conducted in the nature reserve De Westhoek (B) in order to estimate the hydrological impact of shrub removal in favour of the recolonisation and development of herbaceous vegetation types in the dune slacks. Dune slacks are one of the most rare ecotopes in Europe. Therefore, the evapotranspiration of herbaceous and shrub vegetation types was estimated based on experimentally obtained data and modelling. Analysis of the experimentally obtained stomatal resistance values revealed that there was no difference in the minimal stomatal resistance values (in absence of any stress) between herbs and shrubs. Stomatal resistance was modelled based as a function of climatic variables. Maximal rooting depth was similar in both vegetation types, and was maximal 60cm. For both vegetation types more than 60% of the roots were found in the upper 15cm. The mean leaf-area-index (LAI) of herbaceous and shrub vegetations is respectively 2.11±0.34 and 3.27±0.20 m2.m-2. Evapotranspiration of both vegetation types was modelled with a multi-layer dynamic vegetation model FORUG and seasonal evapotranspiration amounted roughly 200 and 550mm for the herbaceous and shrub vegetation types respectively. Although these estimates can be somewhat refined, from these results it can be concluded that shrub removal, and the replacement of this vegetation type by a herbaceous vegetation type, will not result in a lowering of the groundwater table. This knowledge can help managing hydrologically disturbed dune ecosystems.

AB - Research was conducted in the nature reserve De Westhoek (B) in order to estimate the hydrological impact of shrub removal in favour of the recolonisation and development of herbaceous vegetation types in the dune slacks. Dune slacks are one of the most rare ecotopes in Europe. Therefore, the evapotranspiration of herbaceous and shrub vegetation types was estimated based on experimentally obtained data and modelling. Analysis of the experimentally obtained stomatal resistance values revealed that there was no difference in the minimal stomatal resistance values (in absence of any stress) between herbs and shrubs. Stomatal resistance was modelled based as a function of climatic variables. Maximal rooting depth was similar in both vegetation types, and was maximal 60cm. For both vegetation types more than 60% of the roots were found in the upper 15cm. The mean leaf-area-index (LAI) of herbaceous and shrub vegetations is respectively 2.11±0.34 and 3.27±0.20 m2.m-2. Evapotranspiration of both vegetation types was modelled with a multi-layer dynamic vegetation model FORUG and seasonal evapotranspiration amounted roughly 200 and 550mm for the herbaceous and shrub vegetation types respectively. Although these estimates can be somewhat refined, from these results it can be concluded that shrub removal, and the replacement of this vegetation type by a herbaceous vegetation type, will not result in a lowering of the groundwater table. This knowledge can help managing hydrologically disturbed dune ecosystems.

M3 - A3: Article in a journal without peer review

JO - Unknown Journal

JF - Unknown Journal

ER -

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