Area separation of streamflow in an upland catchment with partial peat cover

Smit, Robert; Bragg, Olivia; Ingram, H. A. P.

doi:10.1016/s0022-1694(99)00045-1

Cited by 6 publications

(2 citation statements)

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“…One such attribute is the difference between the hydrological responses of peatlands when compared to the more rapid response of adjacent mineral soils (Smit et al, 1999). Most conventional hydrological models are only capable of simulating the hydraulic conductivity and vertical flow processes of mineral 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

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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

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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

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“…Blackwell (1992) explored the sources of water to the lagg zone of an Irish bog and developed a two-dimensional model of flow into the lagg. Similarly, Smit et al (1999) focused on the hydrological conditions of a lagg in Scotland. Peregon et al (2009) looked at the historic rate of lateral expansion of two Siberian raised bogs, which included characterizing the vegetation and geomorphology of the lagg zone.…”

Section: Introductionmentioning

confidence: 99%

The Essential Role of the Lagg in Raised Bog Function and Restoration: A Review

Howie

Meerveld

2011

Wetlands

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The lagg of a raised bog is a transition zone where runoff collects from the ombrotrophic (rain-fed) bog and adjacent mineral soils. Distinct hydrological and hydrochemical gradients exist across the lagg zone, resulting in specific plant communities. Little research emphasis has been placed on the lagg zone in the past, with studies tending to focus on the more easily-defined bog instead. Recently, peatland researchers have begun to discuss the importance of the lagg to raised bog restoration. This paper reviews current knowledge on lagg zones, the function of this transition zone, some useful indicators to determine its location in the field, and argues that restoration of the lagg should be a key element in raised bog restoration.

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