Hydraulic properties of fen peat soils in Poland

Gnatowski, Tomasz; Szatyłowicz, Jan; Brandyk, T.; Kechavarzi, Cédric

doi:10.1016/j.geoderma.2009.02.021

Cited by 83 publications

(85 citation statements)

References 22 publications

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“…Morris et al (2015) reported near-surface saturated hydraulic conductivities (K) of 2.69 × 10 −2 to 7.16 × 10 −6 m s −1 in bogs. Gnatowski et al (2010) measured values of 5 × 10 −6 m s −1 in a mosscovered peat, which was 2 orders of magnitude larger than for a woody peat (5.56 × 10 −8 m s −1 ). Peat hydraulic parameters values used in this study were applied after Largeron et al (2017), based on Letts et al (2000) and Dawson (2006) ( Table 1).…”

Section: Peat-specific Soils Hydraulicsmentioning

confidence: 63%

“…Observed peatsaturated hydraulic conductivity (K) and diffusivity (D) strongly vary in space, depth, and time. This is partly related to the degree of decomposition and compression of organic matter (Gnatowski et al, 2010). Morris et al (2015) reported near-surface saturated hydraulic conductivities (K) of 2.69 × 10 −2 to 7.16 × 10 −6 m s −1 in bogs.…”

Section: Peat-specific Soils Hydraulicsmentioning

confidence: 99%

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ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales

et al. 2018

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Abstract. Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO 2 fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5 • grid cell, defined from a global peatland map and identified with peat-specific soil hydraulic properties. Runoff from non-peat vegetation within a grid cell containing a fraction of peat is routed to this peat soil tile, which maintains shallow water tables. The water table position separates oxic from anoxic decomposition. The model was evaluated against eddy-covariance (EC) observations from 30 northern peatland sites, with the maximum rate of carboxylation (V cmax ) being optimized at each site. Regarding short-term day-to-day variations, the model performance was good for gross primary production (GPP) (r 2 = 0.76; NashSutcliffe modeling efficiency, MEF = 0.76) and ecosystem respiration (ER, r 2 = 0.78, MEF = 0.75), with lesser accuracy for latent heat fluxes (LE, r 2 = 0.42, MEF = 0.14) and and net ecosystem CO 2 exchange (NEE, r 2 = 0.38, MEF = 0.26). Seasonal variations in GPP, ER, NEE, and energy fluxes on monthly scales showed moderate to high r 2 values (0.57-0.86). For spatial across-site gradients of annual mean GPP, ER, NEE, and LE, r 2 values of 0.93, 0.89, 0.27, and 0.71 were achieved, respectively. Water table (WT) variation was not well predicted (r 2 < 0.1), likely due to the uncertain water input to the peat from surrounding areas. However, the poor performance of WT simulation did not greatly affect predictions of ER and NEE. We found a significant relationship between optimized V cmax and latitude (temperature), which better reflects the spatial gradients of annual NEE than using an average V cmax value.

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Section: Peat-specific Soils Hydraulicsmentioning

confidence: 63%

Section: Peat-specific Soils Hydraulicsmentioning

confidence: 99%

ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales

et al. 2018

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“…In order to handle the heterogeneities along the examined field location, three representative sets of physical-thermal parameters (Table 1) were estimated and assigned to the 38 measurement points. The thermal characteristics were determined based on physical properties of peat of the Biebrza River valley (Churski and Szuniewicz, 1994;Gnatowski et al, 2010), as well as the literature, including Farouki (1986), PetersLidard et al (1998), Schwärzel et al (2002) and Côté and Konrad (2005). Alternatively, uniform sets of parameters were used for simulations.…”

Section: Thermal Modelmentioning

confidence: 99%

A hierarchical approach on groundwater-surface water interaction in wetlands along the upper Biebrza River, Poland

Anibas

Verbeiren

Buis

et al. 2012

Hydrol. Earth Syst. Sci.

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Abstract. As recognized in the European Water Framework Directive, groundwater-dependent wetlands and their diverse ecosystems have important functions which need to be protected. The vegetation in such habitats is often dependent on quality, quantity and patterns of river discharge and groundwater-surface water interaction on a local or reach scale. Since groundwater-surface water exchange studies on natural rivers and wetlands with organic soils are scarce, more functional analysis is needed. To this end we combined different field methods including piezometer nests, temperature as tracer and seepage meter measurements. Some of these measurements were used as inputs and/or as validation for the numerical 1-D heat transport model STRIVE. In transient mode the model was used to calculate spatially distributed vertical exchange fluxes from temperature profiles measured at the upper Biebrza River in Poland over a period of nine months. Time series of estimated fluxes and hydraulic head gradients in the hyporheic zone were used to estimate the temporal variability of groundwater-surface water exchange.This paper presents a hierarchical approach for quantifying and interpreting groundwater-surface water interaction in space and time. The results for the upper Biebrza show predominantly upward water fluxes, sections of recharge, however, exist along the reach. The fluxes depend more on hydraulic gradients than on riverbed conductivity. This indicates that the fluvio-plain scale is required for interpreting the exchange fluxes, which are estimated on a local scale. The paper shows that a conceptual framework is necessary for understanding the groundwater-surface water interaction processes, where the exchange fluxes are influenced by local factors like the composition of the riverbed and the position of the measurement on a local scale, and by regional factors like the hydrogeology and topography on a fluvio-plain scale. The hierarchical methodology increases the confidence in the estimated exchange fluxes and improves the process understanding. The accuracy of the measurements and related uncertainties, however, remain challenges for wetland environments. Gaining quantitative information on groundwatersurface water interaction can improve modeling confidence and as a consequence helps to develop effective procedures for management and conservation of valuable groundwater dependent wetlands.

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“…Properties such as the water holding capacity and hydraulic conductivity are important variables in wetland hydrological studies, and more research into these properties will help improve the understanding of both water dynamics and substance transport through the soil . Soil water retention curves describe the relationship between soil water content and the soil water potential, which is a distinctive characteristic of different conditions and soil types (Gnatowski et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Soil water retention and carbon pools in tropical forested wetlands and marshes of the Gulf of Mexico

Campos

Hernández

Moreno‐Casasola

et al. 2011

Hydrological Sciences Journal

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The ability of marshes and forested wetlands to provide environmental services (water retention in soil and carbon storage) was evaluated at three locations along the coast of Veracruz, Mexico. Hydro-periods were obtained for the different vegetation communities of marshes and forested wetlands. Total organic carbon contents were 26.2% in Pachira swamp, 23.1% in Ficus swamp and 11.2% in marsh soils. The largest values of hydraulically active pore space were observed for marshes (0.79 cm 3 cm -3 ), and the lowest in forested wetlands (0.57 cm 3 cm -3 ). Soil water holding capacity ranged from 556 to 834 L m -2 for swamp areas and from 687 to 880 L m -2 for marshes. The thickness of soil organic layers in the wetland studied had a major control on soil water storage. This suggests that a vast amount of rain water could be retained in the soil. The results indicate that both swamps and marshes play important roles in their capacities to retain water and sequester carbon, although there were no significant differences among them.Key words environmental services; freshwater wetlands; Ficus; hydro-periods; organic soils; Pachira aquatica; swamp; water storage capacity; Mexico Rétention de l'eau des sols et pools de carbone dans les régions tropicales humides boisées et les marais du Golfe du MexiqueRésumé La capacité des marais et zones humides boisées à fournir des services environnementaux (rétention d'eau dans le sol et stockage du carbone) a été évaluée pour trois sites de la côte de Veracruz, au Mexique. Des hydro-périodes ont été obtenues pour les différentes communautés végétales des marais et des zones humides boisées. Les teneurs en carbone organique total ont été de 26,2% dans le marais Pachira and Ficus are swamps, thus forested wetlands. I believe they are in french "humid boisées" Pachira, 23, 1% dans les marais Ficus et 11.2% dans les sols de marais. Les plus grandes valeurs de l'espace poreux hydrauliquement actif ont été observées pour les marais (0.79 cm 3 cm -3 ), et les plus faibles dans les zones humides boisées (0.57 cm 3 cm -3 ). La capacité de rétention en eau du sol varie de 556 à 834 L m -2 pour les zones marécageuses et de 687 à 880 L m -2 pour les marais. L'épaisseur des couches de sol organique dans les zones humides étudiées exerçe un contrôle majeur sur le stockage en eau du sol. Ceci suggère qu'une grande quantité d'eau de pluie pourrait être retenue dans le sol. Les résultats indiquent que les marécages et les marais jouent un rôle important dans leur capacité à retenir l'eau et à piéger le carbone, bien qu'il n'y ait aucune différence significative parmi eux.

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Hydraulic properties of fen peat soils in Poland

Cited by 83 publications

References 22 publications

ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales

ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales

A hierarchical approach on groundwater-surface water interaction in wetlands along the upper Biebrza River, Poland

Soil water retention and carbon pools in tropical forested wetlands and marshes of the Gulf of Mexico

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Hydraulic properties of fen peat soils in Poland

Cited by 83 publications

References 22 publications

ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO&lt;sub&gt;2&lt;/sub&gt;, water, and energy fluxes on daily to annual scales

ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO&lt;sub&gt;2&lt;/sub&gt;, water, and energy fluxes on daily to annual scales

A hierarchical approach on groundwater-surface water interaction in wetlands along the upper Biebrza River, Poland

Soil water retention and carbon pools in tropical forested wetlands and marshes of the Gulf of Mexico

Contact Info

Product

Resources

About

ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales

ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales