A model for the estimation of convective exchange in the littoral region of a shallow lake during cooling

Stefan, Heinz G.; Horsch, Georgios M.; Barko, John W.

doi:10.1007/bf00008162

Cited by 28 publications

(22 citation statements)

References 11 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The two-layered circulation pattern, described by Horsch and Stefan (1988) and Stefan et al ( 1989), occurred during both study periods. During nighttime cooling, bottom water from the littoral zone moved into the pelagic zone as an interflow and was replaced by a return flow of pelagic surface water.…”

Section: H Forward Movement +----A Reverse Movementmentioning

confidence: 69%

“…Two known mechanisms that potentially mediate horizontal P transport are wind-driven circulation (Weiler 19 7 8) and convective circulation induced by nighttime cooling (Horsch and Stefan 198 8;Stefan et al 1989).…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…Horsch and Stefan (1988) and Stefan et al (1989) showed that during calm, cold nights, littoral water cools more rapidly than does pelagic water due to volume differences, resulting in horizontal temperature gradients. Under these conditions, littoral water can move as an undercurrent below the warmer pelagic water, inducing a circulation pattern that transports P. Based on studies with a fluorescent dye, we examined convective circulation patterns and P flux between the littoral and pelagic zones of Eau Galle Reservoir.…”

Section: Acknowledgmentsmentioning

confidence: 99%

See 2 more Smart Citations

Estimation of phosphorus exchange between littoral and pelagic zones during nighttime convective circulation

James

Barko

1991

Limnology & Oceanography

View full text Add to dashboard Cite

A fluorescent dye was used in Eau Galle Reservoir, Wisconsin, to examine nighttime convective circulation patterns and exchanges of P between the littoral and pelagic zones during 25–26 July and 12–13 September 1988. Cooler littoral bottom water moved into the pelagic zone at night as an interflow at 2.5 m in July and at 4.0 m in September. Warmer pelagic water moved into the littoral zone as a surface flow during both periods. The littoral zone exhibited high total P concentrations above the sediment in July, but much lower concentrations in September. Estimated net areal total P flux to the pelagic zone was 1.8 mg m−2 d−1 in July but only 0.2 mg m−2 d−1 in September. Net areal total P flux in July accounted for 22% of the summer average, lakewide internal total P load to the reservoir.

show abstract

Section: H Forward Movement +----A Reverse Movementmentioning

confidence: 69%

Section: Acknowledgmentsmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

See 1 more Smart Citation

Estimation of phosphorus exchange between littoral and pelagic zones during nighttime convective circulation

James

Barko

1991

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Q 12 is mathematically equivalent to the convective¯ow rate described by Stefan et al (1989) and can be seen as an exchange¯ow rate between the two sides of the structure. Q 12 is expected to depend on the volume, porosity and permeability of the structure, as well as on wave dynamics.…”

Section: The Two-cell Modelmentioning

confidence: 99%

“…Although a closed form analytical solution is no longer possible in this case, a unique solution can still be obtained (Stefan et al, 1989).…”

Section: The Two-cell Modelmentioning

confidence: 99%

The beneficial role of rubble mound coastal structures on seawater oxygenation

2000

View full text Add to dashboard Cite

Abstract. The bene®cial role of rubble mound coastal structures on oxygenation under the eect of waves is discussed, based on analytical considerations and experimental data from laboratory experiments with permeable and impermeable structures. Signi®cant oxygenation of the wave-protected area was observed as a result of horizontal transport through the permeable structure. A two-cell model describing the transport of dissolved oxygen (DO) near a rubble mound breakwater structure was developed and used for the determination of the oxygen transfer coecients from the experimental data. Oxygen transfer through the airwater interface is considered a source term in the transport equation and the oxygen¯ux through the structure is taken into account. The mass transport equations for both sides of the structure are solved analytically in terms of time evolution of DO concentration. The behaviour of the solution is illustrated for three dierent characteristic cases of initial conditions. The oxygen transfer through the air±water interface in the wave-in¯uenced area increases the DO content in the area; the resulting oxygen¯ux through the structure is discussed. The analytical results depend on the initial conditions, the oxygen transfer coecient and the exchange¯ow rate through the structure. Experiments with impermeable structures show that air water oxygen transfer in the harbour area is negligible in the absence of waves. In addition the ratio of the horizontal DO¯ux to the vertical¯ux into the seaward side tends towards a constant value, independent of the initial conditions.

show abstract

Fundamentals of Lake Ecology Relevant to Fish‐Forestry Interactions

Northcote¹

2004

Fishes and Forestry

View full text Add to dashboard Cite

A model for the estimation of convective exchange in the littoral region of a shallow lake during cooling

Cited by 28 publications

References 11 publications

Estimation of phosphorus exchange between littoral and pelagic zones during nighttime convective circulation

Estimation of phosphorus exchange between littoral and pelagic zones during nighttime convective circulation

The beneficial role of rubble mound coastal structures on seawater oxygenation

Fundamentals of Lake Ecology Relevant to Fish‐Forestry Interactions

Contact Info

Product

Resources

About