Chapter 9 Tides on the North-West European Continental Shelf

Huntley, David A.

doi:10.1016/s0422-9894(08)71354-0

Cited by 11 publications

(5 citation statements)

References 145 publications

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“…This approach is straight forward, albeit time consuming, in tidal habitats such as the British estuaries and the Wadden Sea, where the lunar tidal amplitude exceeds one metre (Huntley 1980). In such areas the birds can normally rely on two daily low tides, exposing the intertidal habitat, and the investigator can estimate available biomass by mapping food density at low tide.…”

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“…Superimposed on tidal fluctuations are weather induced changes in water level, whereby wind or air pressure moves additional water into or out of tidal areas and modifies the overall water table pattern (e.g. Huntley 1980, Pingree 1980). Dependent on wind strength and direction, this may increase or decrease the extent of habitat area exposed, and thereby food availability during low tide, and storm surges occasionally overrule the tidal fluctuations (Huntley 1980), with subsequent impact on the feeding performance of waders (Evans 1981) and on brent goose habitat use (Clausen & Fischer 1994).…”

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“…Huntley 1980, Pingree 1980). Dependent on wind strength and direction, this may increase or decrease the extent of habitat area exposed, and thereby food availability during low tide, and storm surges occasionally overrule the tidal fluctuations (Huntley 1980), with subsequent impact on the feeding performance of waders (Evans 1981) and on brent goose habitat use (Clausen & Fischer 1994). Zwarts, Hulscher, Koopman & Zegers (1996), however, made a very comprehensive analysis of oystercatchers feeding on mudflats in the Dutch Wadden Sea.…”

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Modelling water level influence on habitat choice and food availability for Zostera feeding brent geese Branta bernicla in non‐tidal areas

Clausen¹

2000

Wildlife Biology

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Brent geese Branta bernicla spring fattening around Agerø, Denmark, alternate between feeding on saltmarshes and submerged Zostera beds in Limfjorden. It appeared from field observations that these alternations depended on the water level in Limfjorden. A model was developed to assess the impact of water level fluctuations on the habitat use. A second model was developed to estimate the impact of water level on Zostera availability. The first model was successful in demonstrating that fluctuations in water levels had considerable influence on habitat use by the brent geese, i.e. they fed on Zostera at low water levels and on saltmarshes during high water levels, particularly so in early spring, and that the switch between habitats occurred within a narrow water level span of ca 30 cm. The second model demonstrated that the switch between habitats could be explained by lowered availability of Zostera as water levels increased. By combining the output from the two models, differences between years could partly be explained by differences in Zostera availability in the early spring period (21 March ‐ 25 April), whereas a more complicated situation was detected later in spring (26 April ‐ 31 May). The models presented may be considered as tools in investigations of habitat use and carrying capacity of seagrass beds in non‐tidal areas, where birds' access to feeding areas regularly may be hindered by high water levels.

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Modelling water level influence on habitat choice and food availability for Zostera feeding brent geese Branta bernicla in non‐tidal areas

Clausen¹

2000

Wildlife Biology

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“…5 knots) at spring tide with the currents predominantly rectilinear to the coastline (Uncles, 1984). The currents are asymmetric due to channel topography, resulting in a stronger but shorter flood than ebb (Huntley, 1980). The Bristol Channel/Severn estuary also has one of the largest tidal ranges in the world (up to 13 .…”

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Tidal turbine deployment in the Bristol Channel: a case study

Willis

Masters

Thomas

et al. 2010

Proceedings of the Institution of Civil Engineers - Energy

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The renewable energy route map for Wales outlines ambitious targets for 50% renewables by 2025. The Welsh coast, subject to tidal ranges of the order of 13 m and tidal flows in excess of 3 m/s, is thus in an ideal position to significantly contribute to these targets. Tidal stream energy is an emerging energy sector and a relatively small number of devices are at various stages of development in Wales. However, before such demonstration devices or arrays can be applied at a larger scale, a number of consents and permissions must be obtained to ensure safe and environmentally responsible deployment. This paper describes the multidisciplinary work that has been undertaken on an area of ocean that could be used for the deployment of a tidal stream turbine. The paper aims to put the scientific work undertaken into the context of device deployment in a complex marine environment and to provide an overview of the surveying and modelling required for the deployment of a single demonstration device off the Welsh coast. The Bristol Channel was chosen as a case study because of its high tidal flows and proximity to national grid connections and support infrastructure. This paper provides an overview of the research carried out during the project; the details of each discipline will be provided in individual papers by the respective subject authors.

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“…surges in the North Sea, strong winds and large pressure anomalies resulting from storms result in an abnormal elevation in sea level(HUNTLEY, 1980) YANAGI et al (1984). revealed that a shelf wave with a period of about five days excited by such meteorological events, had propagated along the San in coast in the Japan Sea from west to east.…”

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The tidal exchange in Lake Shinji under low discharge conditions.

et al. 1989

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The tidal exchange in Lake Shinji, an inner coastal lake connected to a lower one by a long narrow channel, was investigated under low discharge conditions. Fixed point observations at the cross-section in the uppermost reaches of the channel were carried out. Evaluation from the analysis of the velocity and salinity profiles showed that the tidal exchange was the dominant component responsible for the inward salt flux under normal tidal conditions. Moreover, longer term variations of water level with an amplitude superior to the tidal one were recognized in Lake Shinji, and were considered to be another factor of the water exchange between this inner lake and a lower one.

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Chapter 9 Tides on the North-West European Continental Shelf

Cited by 11 publications

References 145 publications

Modelling water level influence on habitat choice and food availability for Zostera feeding brent geese Branta bernicla in non‐tidal areas

Modelling water level influence on habitat choice and food availability for Zostera feeding brent geese Branta bernicla in non‐tidal areas

Tidal turbine deployment in the Bristol Channel: a case study

The tidal exchange in Lake Shinji under low discharge conditions.

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