Post on 29-Jan-2016
transcript
Shorelines
Wave Definitions
Wave Physics
Longshore Transport
Shoreline features
Erosional (mostly)
Shoreline features
Erosional (mostly)
Shoreline featuresDepositional (mostly)
Shoreline ErosionBreakwater
Shoreline Erosion
Jetties and Groins
Shoreline ErosionJetties and Groins
Tides
Tides Types
TsunamisNot all earthquakes generate tsunamis.
Source: Earthquakes by Bruce A. Bolt
Shallow focus-near sea bottom.
Must displace seafloor.
Large magnitude ( > 7.5 )
Open Ocean
Jetliner Speed
Small Height (1-2 feet)
Tectonic earthquake-generated tsunamis
Global Security: http://www.globalsecurity.org/eye/andaman-pix2.htm
Characteristics of Tsunamis
Water Recession: A Precursor
From: Nature Publishing Group
Draw Down Effect
From: Digital Globe
Kalutara Beach, Sri Lanka
Tsunami Propagation
National Institute of Advanced Industrial Science and Technology, Japan
Tsunami Damage
Before Tsunami
January 10, 2003
After Tsunami
December 29, 2004
Source: National University of Singapore
Location: Lhoknga, Indonesia
epicenter
Lhoknga
epicenter
Lhoknga
Tsunami DamageLocation: Lhoknga, Indonesia
epicenter
Lhoknga
epicenter
Lhoknga
Exposed bridge piers of road that washed away.
Damage zone showing an overturned tanker, trees snapped in half, and the high water mark on islands where vegetation was stripped away.
Overturned ship
High Water Mark
Broken Trees
Photo: Jose Borrero
Photo: Jose Borrero