TheAthena
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Hi!
I've been reading about coastal erosion and 'groynes' came up. As far as I can understand, the advantage to having groynes is that material is not moved down the beach in LSD. My teacher then mentioned 'terminal groyne syndrome' as a disadvantage to groynes, and I don't understand what it is or why it is a disadvantage. Could someone please explain what TGS is? (And why it's bad)...
:confused:
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Ferret1
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Terminal groyne syndorme occurs after the 'terminal groyne' (the last one). It leads to extra erosion on the beach further down shore because the sand is prevented from reaching it, hence why it's a bad thing.
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Chlorophile
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(Original post by TheAthena)
Hi!
I've been reading about coastal erosion and 'groynes' came up. As far as I can understand, the advantage to having groynes is that material is not moved down the beach in LSD. My teacher then mentioned 'terminal groyne syndrome' as a disadvantage to groynes, and I don't understand what it is or why it is a disadvantage. Could someone please explain what TGS is? (And why it's bad)...
:confused:
Coastal erosion happens normally in nature. Beaches undergo destructive processes, i.e. material being broken off and carried away, and constructive processes, i.e. sediment being deposited. As you know, Groynes are one strategy used to prevent material from carried away from a beach you want to "protect". However, material being transported away from one beach is probably the source of material for another beach. If you interrupt this natural process, you're starving later beaches of material. The rate of deposition in those beaches will therefore decrease so the net rate of erosion will increase, resulting in greater erosion. So on their own, Groynes are basically a method of protecting parts of the coast at the expense of others.
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