A COMPREHENSIVE ANALYSIS OF MEASURED AND COMPUTED DEPTH OF CLOSURE AROUND THE COAST OF JAPAN

  • Keiko Udo
  • Yuriko Takeda
  • Roshanka Ranasinghe

Abstract

The Depth of closure (DoC), i.e., the depth seaward of which significant sediment transport and consequent elevation changes do not occur, is one of the most important parameters in coastal morphodynamics. The concept is widely used for estimating sediment budgets, numerical models of coastal change, beach nourishment design and disposal of dredged material. With recent interest on climate change impact assessments on coasts, the Bruun (1962) rule, in which DoC is a key parameter, is often used for future beach loss analysis (e.g., Udo and Takeda, 2017); However, the determination of DoC, especially in the absence of repeated profile measurements, is one of the controversial issues in employing the Bruun rule for such impact assessments for decision making (e.g., Ranasinghe et al., 2012).

References

Bruun, P. (1962): Sea-level rise as a cause of shore erosion, J. Waterways and Harbors Div., 88, pp. 117-130.

Hallermeier, R.J. (1978): Uses for a calculated limit depth to beach erosion, Proc. 16th Coastal Eng. Conf., pp. 1493- 1512.

Nicholls R.J., Birkemeier, W.A., and Lee, G. (1998): Evaluation of depth of closure using data from Duck, NC, USA, Marine Geology, vol. 148, pp. 179-201.

Ranasinghe, R., Callaghan, D., and Stive, M.J.F. (2012): Estimating coastal recession due to sea level rise: beyond the Bruun Rule, Climatic Change, vol. 110, pp. 561-574.

Uda, T. (1996): Coastal erosion in Japan, 442p.

Udo, K., Takeda, Y. (2017): Projections of future beach loss in Japan due to sea-level rise and uncertainties in projected beach loss, Coast. Eng. J., vol. 59, 1740006.

Published
2018-12-30
How to Cite
Udo, K., Takeda, Y., & Ranasinghe, R. (2018). A COMPREHENSIVE ANALYSIS OF MEASURED AND COMPUTED DEPTH OF CLOSURE AROUND THE COAST OF JAPAN. Coastal Engineering Proceedings, 1(36), sediment.37. https://doi.org/10.9753/icce.v36.sediment.37

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