Quantification of the water balance and hydrogeological processes in the vicinity of a small groundwater-fed wetland, East Anglia, UK

Gilvear, David; Andrews, Richard; Tellam, John H.; Lloyd, John William; Lerner, David N.

doi:10.1016/0022-1694(93)90178-c

Cited by 67 publications

(53 citation statements)

References 8 publications

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“…McNamara et al (1992), working in a similar fen complex in central New York, also found that such small changes in hydraulic head were crucial in determination of recharge and discharge patterns. Conversely, however, in a tufa mound fen (UK), Gilvear et al (1993) found very strong hydraulic head gradients (1 m or more) within piezometer clusters, and temporal variability of individual piezometers ranged from 30 to 60 cm. Such disparate ®ndings indicate that hydrogeological setting has great bearing on the local and ®ne-scale groundwater¯ow in a wetland.…”

Section: Discussionmentioning

confidence: 91%

“…Of the studies that have been conducted, most have focused chie¯y on wetland-or watershed-wide biogeochemical and hydrological processes in the context of larger ow systems (e.g. Hill, 1990;Roulet, 1990;McNamara et al, 1992;Gilvear et al, 1993). These studies have largely stressed spatial over temporal aspects of natural hydrological variability.…”

Section: Introductionmentioning

confidence: 98%

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Fine-scale characteristics of groundwater flow in a peatland

et al. 1999

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Abstract:Fine-scale dynamics of groundwater¯ow were studied in a 1 . 5 ha peatland in central New York. Measurements of the hydraulic head throughout a detailed network of piezometer clusters revealed spatial and temporal variability in the direction of groundwater¯ow at a very ®ne (within a few metres) scale of analysis. Within the small wetland, there were areas of groundwater recharge, discharge and lateral¯ow. Such patterns of groundwater¯ow frequently reversed or changed due to¯uctuations of only a few centimetres in hydraulic head. Speci®c conductance, deuterium signatures and calcium concentrations of groundwater corroborated the groundwater¯ow patterns determined with hydraulic head measurements and illustrated the in¯uence of source water chemistry and evaporation on dierent layers in the peat column. The control of peat chemistry by such ®ne-scale groundwater¯ow may have important implications for plant community composition and diversity in groundwater-fed peatlands.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 98%

Fine-scale characteristics of groundwater flow in a peatland

et al. 1999

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“…One way in which this may be achieved is through the use of hydrological models. Although data-intensive, the technique is invaluable in determining the relationship of wetlands to groundwater flow (Gilvear et al, 1993) and in considering water flows through large wetland systems (Hammer and Kadlec, 1986). Most recent examples of hydrological models applied to wetland systems are derived from Collection of data to characterize wetland hydrology and for input to a hydrological model of the site.…”

Section: Discussionmentioning

confidence: 99%

“…Most wetland studies appear to have been directed towards the study of wetlands exposed to peat cutting (e.g. Heathwaite, 1994) and small groundwater-fed wetlands (Gilvear et al, 1993;Lloyd et al, 1993). A notable exception has been the study of Grieve et al (1995) who described the hydrology of the Insh Marshes in Scotland and the importance of a combination of three water sourcesÐriver water, groundwater and rainfall.…”

Section: Introductionmentioning

confidence: 97%

The hydrological basis for conservation of floodplain wetlands: implications of work at Narborough Bog, UK

Bradley

1997

Aquatic Conserv: Mar. Freshw. Ecosyst.

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1. Increasing concern for the environmental consequences of wetland loss has yet to be reflected in a wider application of hydrological techniques for their preservation. This paper looks at the specific example of floodplain wetlands by first considering how local hydrogeomorphological conditions may explain varied wetland occurrence. The effects of variations in individual hydrological fluxes are identified and the ability of standard hydrological monitoring programmes to represent these processes is considered. 2. These concepts are illustrated with reference to work on Narborough Bog, a small floodplain wetland in the UK. The characteristics of the wetland are outlined to illustrate how this determined the design of a monitoring programme investigating wetland hydrology and the practicalities of conservation. Measurements of water‐table height were completed using a network of 30 piezometers located in the wetland and with additional measurements of river stage and meteorological variables. 3. The results of this data collection programme over the period 1991–1993 are described. The value of the data in characterizing the hydrology of the wetland is assessed and the need for sustained monitoring of variations in wetland water storage and flux is emphasized. The implications of the results for future wetland monitoring programmes are identified. 4. Hydrological data collected in this way can be used to develop a wetland mathematical model. This may be achieved by aggregating wetland sedimentological characteristics and by modelling specific periods of precipitation and evapotranspiration to determine the validity of the modelling process. Current shortcomings in the modelling process are discussed; however, wider application of this technique might help direct informed conservation of floodplain wetland landforms through improved understanding of the balance between internal and external water fluxes and their interrelationships. Similarly, models enable evaluation of the impacts of future catchment changes on wetlands. © 1997 John Wiley & Sons, Ltd.

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“…Several studies have stressed a need for an improved understanding of wetland hydrology as a critical component for supporting a variety of wetland research and management objectives (Kusler and Kentula, 1990;NRC, 1995;Hughes et al, 1998) and for developing wetland hydrologic models for vulnerability assessment (Gilvear et al, 1993). Despite of the importance placed on the influence of hydrology on wetland processes, the wetland hydrology is still not fully understood (Zmolek et al, 1997), and consequently, many of the mechanisms by which wetlands retain and process waterborne inputs are also poorly understood (Johnson, 1991).…”

Section: Introductionmentioning

confidence: 99%

Hydrologic Budget Analysis of a Small Natural Wetland in Southeast USA

Chaubey

Ward

2006

J ENV INFORM

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ABSTRACT. Temporal variability and linkages among hydrologic components of a natural riparian wetland in the southeast USA were examined using two years of measured data. Rainfall was the dominant inflow and evapotranspiration (ET) the dominant outflow for the wetland. The wetland response factor, defined as the ratio of runoff to rainfall volume, was small and surface runoff accounted for only 9% of the total rainfall. ET was significantly different for wetland vegetation types and was significantly less than Class A Pan evaporation for most part of the year. Water losses through groundwater discharge accounted for 20% of the annual water budget. On an annual scale, very little water was added to storage within the wetland. Because of its shallow nature the wetland did not have a large capacity for flood storage and did not always attenuate floods. The results obtained from this research should be applicable to other natural riparian wetlands in temperate/subtropical climates. Also, the data should be useful to developing and validating hydrologic models of natural and constructed wetlands.

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Quantification of the water balance and hydrogeological processes in the vicinity of a small groundwater-fed wetland, East Anglia, UK

Cited by 67 publications

References 8 publications

Fine-scale characteristics of groundwater flow in a peatland

Fine-scale characteristics of groundwater flow in a peatland

The hydrological basis for conservation of floodplain wetlands: implications of work at Narborough Bog, UK

Hydrologic Budget Analysis of a Small Natural Wetland in Southeast USA

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