coasts (CS) Flashcards
(30 cards)
What is Louisiana susceptible to?
Storm surges
Global sea rise
Isostatic tectonic uplift
Which coast of Ireland is an example of a discordant coastline?
west cork coastline
Sognefjorden-Norway
Submergent coastline as a result of eustatic SLR
Largest Fjord system in Norway -extends 200km inland from west coast
Alignment corresponds to fracture system in bed rock (exploited by rivers, then glaciers)
properties of the White rocks
located in Northern Ireland, made from ulster limestone and chalk. Protected from storm waves by the Skerries. Basalt rock cap protects it from sub- aerial erosion.
NW Guinea sea levels has risen how much since 1950?
10cm
Why is Bight of Benin, off the coast of Guinea, an area that is particularly affected by erosion?
The Bight of Benin, off the coast of Guinea, is an area particularly affected by erosion resulting from the construction of jetties and large harbours with breakwaters extending into the sea,
dredging activities, and the extraction of sand for construction (Wellens- Mensah 1994).
Why is NW Guinea coast receding?
- Rising sea-levels – 10cm since 1950, 1m by 2100
- Swell waves (Stormy months of august and October – wave heights upto 3m)
- Loss of mangrove forests – e.g. Kabrousse – because mangroves being harvested as fuel wood to smoke fish / household needs
- Additionally, lots of rainfall
- Intensive sand-mining in the mangroves and rivers, stops material getting into the sea.
- Gold and diamond mining along rivers, means gravel is extracted from rivers each day, but not
necessarily returned, e.g. used for building local mud houses – so material doesn’t - Sand is removed from coastline for construction
Because of NW Guinea coastal recession what were the consequences?
Tourist resorts swept away
o Saltwater intrusions destroying the habitats of marine tutles / African manatee
o Beach dunes reduced
o Natural vegetation (mangroves) removed or dislodged
case study example of storm surges
Bangladesh; very much low-lying, 1-3m asl
Surges meet outflowing river discharges
Intense rainfall from tropical cyclones
trinidad + tobago (T+T)
- SID (small island developing state)
- 70% live or work on the coast
- 400k+ for desireable beach location and growing eco-tourism industry
What beach flooded in 2014? and how much could replacement cost? (econ loss) (T+T)
Manzanillo - destroyed 300m of road access, replacement up to 5M pounds
How much are beach homes estimated in Mayaro? (T+T)
In excess of 700K
What will happen to luxury local property? (T+T)
Value will decrease w/increased erosion rates. Cost of relocation and break up of community more damaging for poorer locals.
How is transport/access affected? (T+T)
By road damage during Manzanillo flood -> location for Hindu Karthik festival, impact for commuters to oil and tourism
Nesting sites for which endangered species contribute to the ecotourism industry? (T+T)
Leatherback turtles
What does the Wildlife Sanctuary & Reserve on South Coast have? (T+T)
16,000-acre wealth of flora and fauna
Why is New York going to suffer with so much flooding? (NY)
because the coastlines are low-lying
Why are the coasts low-lying? (NY)
Because they are coastal plains, such as beaches - makes it good access for trade and tourism
How low-lying is The Netherlands? (NDL)
very ; 26% below sea level
What is the SLR since 1900? (NDL)
19cm
rate of subsidence per year? (NDL)
~8mm/yr
What was the cause of the February 1953 Great Flood? (NDL)
A mid-latitude depression had moved south through the North Sea, generating a 5m storm surge.
What percentage of land has the sea inundated of Holland’s land area? (NDL)
17%
What percent of the population are living on flood-prone land? (NDL)
66%
