B.5.1 Spatial Interactions in Coastal and Ocean Systems (Synthesis)
System Interconnectivity
Coastal Systems Dynamics
The coastal zone is one of Earth's most dynamic environments, where land meets sea in a complex dance of interactions.
CalloutKey components include:
- Beach systems with their ever-shifting sands
- Dune formations acting as natural barriers
- Estuaries where fresh and salt water mix
- Barrier islands protecting mainland coasts
Ocean Systems and Their Flow Patterns
Ocean systems operate on a grand scale, driven by two main types of circulation:
- Surface circulation: Wind-driven currents
- Deep circulation: Density-driven thermohaline flows
- Transports warm tropical water
- Influences coastal weather patterns
- Affects marine ecosystem distribution
Interactions
Coastal Erosion and Sediment Dynamics
The Sediment Supply Chain
Coastal areas receive sediment through two main pathways:
- Fluvial transport (rivers) - accounting for 95% of sediment delivery
- Aeolian transport (wind) - particularly important in arid coastal regions
Impact on Ecosystems
Changes in sediment supply create ripple effects throughout coastal ecosystems:
- Altered beach profiles
- Changed habitat availability
