Coastal lake tidal range amplifies sea-level threat in Lake Macquarie, Australia

摘要: Understanding the contributions of sea-level and tidal range to total water levels is important for accurate assessments of future inundation risk. This is particularly critical in estuaries where low-lying development often becomes vulnerable to inundation with only small changes in water levels. Lake Macquarie is a large, microtidal coastal lake on the eastern coast of Australia. Increasing tidal range has been observed since water level records began in 1986 and has been attributed to morphological adjustment to entrance training that occurred in the late 1800s. Within tidal basins, the tidal range (the mean height between low and high water levels) is influenced by many variables including entrance conditions, basin geometry, river flow, and the tidal range at the ocean boundary. Increasing water depths in shallow, dissipative tidal basins like Lake Macquarie are linked to reduced attenuation, thus rising sea-level is …