Shifting the waterlines of satellite images to the mean water shorelines considering wave runup, setup, and tidal variation

Hsien-Kuo Chang; Wei-Wei Chen; Jin-Cheng Liou

doi:10.1117/1.JRS.9.096004

25 September 2015 Shifting the waterlines of satellite images to the mean water shorelines considering wave runup, setup, and tidal variation

Hsien-Kuo Chang, Wei-Wei Chen, Jin-Cheng Liou

Author Affiliations +

Funded by: National Science Council

Journal of Applied Remote Sensing, Vol. 9, Issue 1, 096004 (September 2015). https://doi.org/10.1117/1.JRS.9.096004

Abstract

Shoreline evolution is a simple and common method to illustrate beach erosion or accretion in coastal engineering. Extracted waterlines on different satellite images are sometimes used for shoreline evolution. However, time-varying waterlines for tidal variation and wave runup are different from the shoreline at the mean water level. Waterline evolution may bring about misunderstanding of beach erosion or accretion. In a former study, the one-line shift method was proposed to determine the waterlines on a satellite image and to shift the waterlines to shorelines while only considering the tidal variation. The upward shift extension of the waterline due to wave runup and wave setup is considered. Some acceptable equations of wave runup were examined to correct the waterlines on three satellite images in one month when the foreshore beach slopes were specified. The suggested equation for wave runup includes both wave conditions and an average beachface slope at two points located shoreward and seaward away from mean water level by an equal distance of 62.5 m. When on-site shore bathymetrical measurement is sometimes unavailable, a method of minimizing the difference between the initially guessed and estimated foreshore beach slopes by the one-line shift method is proposed.

Citation Download Citation

Hsien-Kuo Chang, Wei-Wei Chen, and Jin-Cheng Liou "Shifting the waterlines of satellite images to the mean water shorelines considering wave runup, setup, and tidal variation," Journal of Applied Remote Sensing 9(1), 096004 (25 September 2015). https://doi.org/10.1117/1.JRS.9.096004

Published: 25 September 2015

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE