Quantifying the effects of urban green space on water partitioning and ages using an isotope-based ecohydrological model

dc.contributor.authorGillefalk, Mikael
dc.contributor.authorTetzlaff, Dörthe
dc.contributor.authorHinkelmann, Reinhard
dc.contributor.authorKuhlemann, Lena-Marie
dc.contributor.authorSmith, Aaron
dc.contributor.authorMeier, Fred
dc.contributor.authorManeta, Marco P.
dc.contributor.authorSoulsby, Chris
dc.date.accessioned2022-01-13T14:52:27Z
dc.date.available2022-01-13T14:52:27Z
dc.date.issued2021-06-29
dc.description.abstractThe acceleration of urbanization requires sustainable, adaptive management strategies for land and water use in cities. Although the effects of buildings and sealed surfaces on urban runoff generation and local climate are well known, much less is known about the role of water partitioning in urban green spaces. In particular, little is quantitatively known about how different vegetation types of urban green spaces (lawns, parks, woodland, etc.) regulate partitioning of precipitation into evaporation, transpiration and groundwater recharge and how this partitioning is affected by sealed surfaces. Here, we integrated field observations with advanced, isotope-based ecohydrological modelling at a plot-scale site in Berlin, Germany. Soil moisture and sap flow, together with stable isotopes in precipitation, soil water and groundwater recharge, were measured over the course of one growing season under three generic types of urban green space: trees, shrub and grass. Additionally, an eddy flux tower at the site continuously collected hydroclimate data. These data have been used as input and for calibration of the process-based ecohydrological model EcH2O-iso. The model tracks stable isotope ratios and water ages in various stores (e.g. soils and groundwater) and fluxes (evaporation, transpiration and recharge). Green water fluxes in evapotranspiration increased in the order shrub (381±1mm)<grass(434±21mm)<trees(489±30 mm), mainly driven by higher interception and transpiration. Similarly, ages of stored water and fluxes were generally older under trees than shrub or grass. The model also showed how the interface between sealed surfaces and green space creates edge effects in the form of “infiltration hotspots”. These can both enhance evapotranspiration and increase groundwater recharge. For example, in our model, transpiration from trees increased by ∼ 50 % when run-on from an adjacent sealed surface was present and led to groundwater recharge even during the growing season, which was not the case under trees without run-on. The results form an important basis for future upscaling studies by showing that vegetation management needs to be considered within sustainable water and land use planning in urban areas to build resilience in cities to climatic and other environmental change.en
dc.description.sponsorshipDFG, 414044773, Open Access Publizieren 2021 - 2022 / Technische Universität Berlinde
dc.identifier.eissn1607-7938
dc.identifier.issn1027-5606
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16123
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-14897
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc550 Geowissenschaftende
dc.subject.otherisotope-based ecohydrological modelen
dc.subject.otherurban green spaceen
dc.subject.otherwater partitioningen
dc.subject.otherecohydrological partitioning of urban wateren
dc.subject.otherstable water isotopesen
dc.titleQuantifying the effects of urban green space on water partitioning and ages using an isotope-based ecohydrological modelen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.5194/hess-25-3635-2021en
dcterms.bibliographicCitation.issue6en
dcterms.bibliographicCitation.journaltitleHydrology and Earth System Sciences (HESS)en
dcterms.bibliographicCitation.originalpublishernameCopernicusen
dcterms.bibliographicCitation.originalpublisherplaceMünchenen
dcterms.bibliographicCitation.pageend3652en
dcterms.bibliographicCitation.pagestart3635en
dcterms.bibliographicCitation.volume25en
tub.accessrights.dnbfreeen
tub.affiliationFak. 6 Planen Bauen Umwelt>Inst. Bauingenieurwesen>FG Wasserwirtschaft und Hydrosystemmodellierungde
tub.affiliation.facultyFak. 6 Planen Bauen Umweltde
tub.affiliation.groupFG Wasserwirtschaft und Hydrosystemmodellierungde
tub.affiliation.instituteInst. Bauingenieurwesende
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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