A Method to Determine Unsaturated Hydraulic Conductivity in Living and Undecomposed <i>Sphagnum</i> Moss

Price, Jonathan S.; Whittington, Peter; Elrick, D. E.; Strack, Maria; Brunet, N.; Faux, Erica

doi:10.2136/sssaj2007.0111n

Cited by 89 publications

(115 citation statements)

References 31 publications

Supporting

Mentioning

100

Contrasting

Order By: Relevance

“…The parameter values of the moss layer for water and energy properties were derived from a number of recent experiments measuring the hydraulic properties of mosses (Price et al, 2008;Price and Whittington, 2010;McCarter and Price, 2012) (Table 1). Living mosses range from 2-3 to over 5 cm in height (Rice et al, 2008) and have lower values of dry bulk density and field capacity than fibric peat (Price et al, 2008).…”

Section: Soil Layersmentioning

confidence: 99%

“…Living mosses range from 2-3 to over 5 cm in height (Rice et al, 2008) and have lower values of dry bulk density and field capacity than fibric peat (Price et al, 2008). Compared to fibric peat, the saturated hydraulic conductivity of living moss is higher by orders of magnitude (Price et al, 2008) and the thermal conductivity is more affected by the water content (O'Donnell et al, 2009). To fully account for the effect of mosses, we set the depth of the living moss (z m ) within the top soil (i.e.…”

Section: Soil Layersmentioning

confidence: 99%

See 1 more Smart Citation

Integrating peatlands into the coupled Canadian Land Surface Scheme (CLASS) v3.6 and the Canadian Terrestrial Ecosystem Model (CTEM) v2.0

Verseghy

Melton

2016

Geosci. Model Dev.

View full text Add to dashboard Cite

Abstract. Peatlands, which contain large carbon stocks that must be accounted for in the global carbon budget, are poorly represented in many earth system models. We integrated peatlands into the coupled Canadian Land Surface Scheme (CLASS) and the Canadian Terrestrial Ecosystem Model (CTEM), which together simulate the fluxes of water, energy, and CO 2 at the land surface-atmosphere boundary in the family of Canadian Earth system models (CanESMs). New components and algorithms were added to represent the unique features of peatlands, such as their characteristic ground floor vegetation (mosses), the slow decomposition of carbon in the water-logged soils and the interaction between the water, energy, and carbon cycles. This paper presents the modifications introduced into the CLASS-CTEM modelling framework together with site-level evaluations of the model performance for simulated water, energy and carbon fluxes at eight different peatland sites. The simulated daily gross primary production (GPP) and ecosystem respiration are well correlated with observations, with values of the Pearson correlation coefficient higher than 0.8 and 0.75 respectively. The simulated mean annual net ecosystem production at the eight test sites is 87 g C m −2 yr −1 , which is 22 g C m −2 yr −1 higher than the observed annual mean. The general peatland model compares well with other site-level and regional-level models for peatlands, and is able to represent bogs and fens under a range of climatic and geographical conditions.

show abstract

Section: Soil Layersmentioning

confidence: 99%

Section: Soil Layersmentioning

confidence: 99%

Integrating peatlands into the coupled Canadian Land Surface Scheme (CLASS) v3.6 and the Canadian Terrestrial Ecosystem Model (CTEM) v2.0

Verseghy

Melton

2016

Geosci. Model Dev.

View full text Add to dashboard Cite

show abstract

“…The saturated hydraulic conductivity and parameters (i.e., α, n, θ sat , and θ r ) for van Genuchten water retention curve (Eq. (10)) were set separately for individual organic layers (Price et al, 2008) (see supplementary material for more details). The saturated hydraulic conductivity (λ sat ), α, m, θ sat , and θ r , for the mineral soil were estimated using ROSETTA based on the soil texture (Schaap et al, 2001).…”

Section: Model Descriptionmentioning

confidence: 99%

Water and heat transport in boreal soils: Implications for soil response to climate change

Fan

Neff

Harden

et al. 2011

Science of The Total Environment

View full text Add to dashboard Cite

“…Some work is underway in Canada. Price et al (2008) designed laboratory apparatus that can measure hydraulic conductivity of the porous material found in peat soils. Levrel et al (this issue) measured hydraulic conductivity from peatland columns sampled in boreal bogs as well as from nearby forests established on partially peaty soils.…”

Section: How Could Hydrological Models Be Improved To Incorporate Peamentioning

confidence: 99%

Improving Hydrological Predictions in Peatlands

Whitfield¹,

St‐Hilaire²,

Kamp³

2009

Canadian Water Resources Journal

View full text Add to dashboard Cite

Abstract:Peatlands form an important part of the Canadian landscape and of many Canadian drainage basins. While there is a considerable body of literature and existing research on peatlands, this paper presents a discussion of areas that should be considered in the future to improve hydrological predictions for drainage basins that contain a significant proportion of peatlands. The critical hydrological issues concern evapotranspiration from peatlands and the water storage and water transmission properties of peatlands as influenced by the structure and composition of peat. The transient surface and subsurface exchange of peatland water with adjacent peatlands and with the surrounding uplands is also important but difficult to characterize. A related area of research is determining how organic matter decomposes and accumulates and changes through time creating the shallow aquifer-aquitard system that is a peatland. The resulting structural differences lead to hydrological, chemical, and ecological differences that reflect the diversity and complexity of peatlands across Canada. This synthesis was informed by the contents of the present volume and the opinions of a cross-section of our colleagues.Résumé : Les tourbières forment une composante importante du paysage canadien et de nombreux bassins versants du pays. Bien que de nombreuses recherches aient porté sur les tourbières, cet article présente une discussion sur les sujets méritant un effort de recherche accru afin d'améliorer la prévision hydrologique pour les bassins versants influencés par la présence de tourbières. Les lacunes importantes au niveau hydrologique incluent la compréhension détaillée des processus d'évapotranspiration, de même que les mécanismes d'emmagasinement et de transmission de l'eau qui sont influencés par la structure et la composition de la tourbe. Les transferts en surface et hypodermiques de l'eau d'une tourbière vers d'autres milieux humides adjacents sont aussi imparfaitement compris. La décomposition de matière organique et son accumulation, qui influencent l'évolution des mécanismes de stockage d'eau souterraine nécessitent aussi plus d' étude. Les différences dans la structure des tourbières amènent des différences dans l'hydrologie, la chimie et les fonctions écosystémiques des tourbières au Canada. Cette synthèse a été réalisée à partir des conclusions des travaux présentés dans ce volume, de même que les opinons d'un échantillon de collègues à travers le pays et au-delà. 468Canadian Water Resources Journal/Revue canadienne des ressources hydriques

show abstract

A Method to Determine Unsaturated Hydraulic Conductivity in Living and Undecomposed Sphagnum Moss

Cited by 89 publications

References 31 publications

Integrating peatlands into the coupled Canadian Land Surface Scheme (CLASS) v3.6 and the Canadian Terrestrial Ecosystem Model (CTEM) v2.0

Integrating peatlands into the coupled Canadian Land Surface Scheme (CLASS) v3.6 and the Canadian Terrestrial Ecosystem Model (CTEM) v2.0

Water and heat transport in boreal soils: Implications for soil response to climate change

Improving Hydrological Predictions in Peatlands

Contact Info

Product

Resources

About