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Numerical Modeling of Beach Morphological Change: A Case Study of Kaanapali Beach, Maui, Hawaii

Sea Engineering, Inc. Honolulu, HI 96817, USA

E-mail Address: ihardy@seaengineering.com

Previously at the Department of Ocean and Resources Engineering, University of Hawaii at Manoa.

Department of Ocean and Resources Engineering, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI 86822, USA

E-mail Address: zhenhua@hawaii.edu

Corresponding author.

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David Smith

Sea Engineering, Inc. Honolulu, HI 96817, USA

E-mail Address: dsmith@seaengineering.com

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, and

Charles H. Fletcher

Department of Earth Sciences, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI 86822, USA

E-mail Address: fletcher@soest.hawaii.edu

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https://doi.org/10.1142/S2529807020500025Cited by:0 (Source: Crossref)

Abstract

This case study reports results from field observations and numerical simulations of waves and morphological changes along a portion of Kaanapali Beach on West Maui, Hawaii, which is protected by a hard coral reef and experiences shoreline changes from season to season. The SWAN spectral wave model shows reasonable agreement with ADCP observations of wave-heights for the winter months. Simulated beach profile change over one-month time frame was able to reasonably capture the trend of beach face migration (accretion or erosion); the modeled shoreline also shows satisfactory agreement with beach survey data. This case study suggests that Delft3D is able to capture key features of sediment transport along a narrow beach protected by a fringing reef.

Keywords:

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