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

http://upload.wikimedia.org/wikipedia/en/c/c8/Banda_Aceh_Before_and_After_2004_Tsunami.jpg