Minggu Ke-8 Coastal System
Minggu Ke-8 Coastal System
Minggu Ke-8 Coastal System
DOSEN PENGAMPU :
1. ALFEND RUDYAWAN, S.T., M.T., PH.D.
2. DICKO RIZKY FEBRIANSANU, S.T., M.ENG.
Terrain :
• Fluvial
• Coastal
• Folded Mountain
• Volcanoes
• Karst Morphology
• Complex Structures Coastal
COASTAL SYSTEM
Coastal
COASTAL SYSTEM
Wind-driven waves
Currents
Littoral drift (Longshore Drift)
Tides
Storm surges and tsunamis
Fluvial processes
Coastal
Coastal System COASTAL DYNAMICS
Coastal
Surf zone adalah daerah yang terbentang antara bagian dalam dari gelombang pecah
Coastal System
sampai batas naik-turunnya gelombang di pantai.
COASTAL ZONES
Surf zone adalah daerah yang terbentang antara bagian dalam dari gelombang pecah sampai batas naik-
turunnya gelombang di pantai.
Breaker zone adalah daerah dimana gelombang yang datang dari laut (lepas pantai ) mencapai ketidak-
stabilan dan menyebabkan gelombang pecah.
Swash zone adalah daerah yang dibatasi oleh garis batas tertinggi naiknya gelombang dan batas terendah
turunnya gelombang di pantai.
Coastal
Coastal System WAVE TERMINOLOGY
Coastal
Coastal System WAVE ACTION
Coastal
Coastal System WAVE ACTION
Wave reflection
• Occurs on steep shorelines (i.e.
deep water near shore)
• Waves don’t break; instead they
are
• Reflected back from the
shoreline
Coastal
Coastal System WAVE ACTION
Coastal
PERGERAKAN GELOMBANG VS GARIS PANTAI
Coastal
Coastal System WAVE ACTION
Coastal
Coastal System WAVE ACTION
Coastal
Coastal System WAVE ACTION
Coastal
Coastal System WAVE ACTION
Tides
• Waves generated by interaction of
the gravitational fields of Earth,
Moon, and Sun
• In deep water, very large L and C
• as tidal waves shoal, L and C
decrease, H increases
Coastal
GELOMBANG & TRANSPORT SEDIMEN
Coastal
ARUS LONGSHORE PEMBAWA TRANSPORT SEDIMEN
Coastal
Coastal System WAVE ACTION
WAVE REFRACTION
Coastal
Coastal System WAVE ACTION
WAVE REFRACTION
Coastal
Coastal System WAVE - TRANSPORT & SEDIMENTATION
LONGSHORE CURRENTS
Coastal
Coastal System WAVE - TRANSPORT & SEDIMENTATION
Coastal
Coastal System WAVE - TRANSPORT & SEDIMENTATION
LONGSHORE DRIFT
Coastal
Coastal System WAVE EROSION
Coastal
Coastal System WAVE EROSION
Coastal
Coastal System COASTAL LANDFORM
PRIMARY COASTS
Coastal
Coastal System COASTAL LANDFORM
SECONDARY COASTS
Coastal
Coastal System COASTAL LANDFORM
• Sea cliff
• Wave cut platform
• Coastal terraces
Coastal
Coastal System COASTAL LANDFORM
Include :
• - beaches and beach ridges
• - spits
• - barrier islands
Coastal
Coastal System COASTAL LANDFORM
COASTAL
MORPHOLOGY
Coastal
Coastal System COASTAL LANDFORM
COASTAL
MORPHOLOGY
Coastal
Coastal System COASTAL LANDFORM
SPITS
Coastal
Coastal System COASTAL LANDFORM
SPITS
>> BARRIER ISLANDS
Coastal
Coastal System COASTAL LANDFORM
BARRIER ISLANDS
Coastal
Coastal System COASTAL LANDFORM
Barrier island -
Delta
Coastal
Coastal System COASTAL LANDFORM
Barrier island -
Delta
Coastal
Coastal System COASTAL LANDFORM
SPITS MIGRATION
Coastal
Coastal System COASTAL LANDFORM
TOMBOLO
Coastal
Coastal System
COASTAL
DEVELOPMENT
Coastal
Coastal System COASTAL LANDFORM
SEA ARCH
Coastal
Coastal System COASTAL LANDFORM
BEACH TERRACES
Coastal terraces
• Wave cut platforms now high above sea or
lake level
• Sea-cliffs may be preserved above and/or
below terrace
• Form through sea- or lake-level fall or
through tectonic uplift
Coastal
Coastal System COASTAL LANDFORM
BEACH TERRACES
Coastal
Coastal System COASTAL LANDFORM
WAVE-CUT PLATFORM
Coastal
Coastal System STREAM - COAST Interaction
Deltas
DELTA
Coastal
Coastal System STREAM - COAST Interaction
DELTA
Delta growth
• Progradation into ocean or lake
• Switching between delta lobes
Delta Form
• Reflects interaction of river flow, waves,
and tidal currents
Coastal
Coastal System STREAM - COAST Interaction
DELTA
Coastal
Coastal System STREAM - COAST Interaction
DELTA
Coastal
Coastal System STREAM - COAST Interaction
DELTA
Coastal
Coastal System STREAM - COAST Interaction
DELTA
Coastal
Coastal System STREAM - COAST Interaction
DELTA
Coastal
Coastal System STREAM - COAST Interaction
DELTA
Coastal