Coastal Systems And Landscapes Flashcards
` ``What are the 4 factors in dynamo equilibrium in a beach
-supply of sand
-energy of waves
-changes in sea level
-location of shoreline
Explain dynamic equilibrium of a coast in the terms of waves?
Summer-constructive waves, beach grows
Winter-destructive waves, beach erodes
Definition of dynamic equilibrium
System counteracts change in elements to remains in set parameters
Definition of negative feedback
System counteracts change by lessening the effect and reversing it
Definition of positive feedback
Accelerates effect of element in system
Example of positive feedback
Sun warms up earth,ice melts, dark ocean absorbs rays, heats up earth
What is an open system and examples
-System allows flow of mass and energy across system boundary
-sun, hydrosphere,coast
What is a closed system and example
-System allows flow of energy across system boundary. Fixed mass
-earth,geosphere
What are some energy inputs in a coastal system
wind, waves,tides
What are some material inputs in a coastal system
cliff erosion, fluvial processes, glacial processes
What are some stores/processes in a coastal system
beaches ,dunes, salt marshes, wave cut platforms
What are some outputs in a coastal system
sediment of beach
What are the reasons why there is a small amounts of sediment lost
-high energy conditions- leaks into neighbouring cells
-transfer of sediment beyond coastline- upper beaches
-sediment permanently lost- sediment sinks
What is an input?
material or energy moving into system from outside
What is an output?
material or energy moving from system to outside
