Sample Sidebar Module

This is a sample module published to the sidebar_top position, using the -sidebar module class suffix. There is also a sidebar_bottom position below the menu.

Sample Sidebar Module

This is a sample module published to the sidebar_bottom position, using the -sidebar module class suffix. There is also a sidebar_top position below the search.

Coastal Erosion Map

Coastal Erosion

Coastal erosion in Sierra Leone is accelerated due to anthropogenic activities and poorly planned coastal infrastructure development adding stresses on the coastal ecosystems. The complex coastal environment processes and shoreline stability or the dynamics of accretion or erosion are driven by coastal hydrodynamics, sediment balance and coastal geomorphology etc. influenced by wave climate and shoreline geometry.

Frequency
Often

Magnitude
Moderate

Duration
Long

Areal Extent
Limited

Spatial Predictability
Highly Predictable

Speed of Onset
Very Slow

Importance
Important

Spatial Dispersion
Very Concentrated

































The coastal erosion hazard profile uses a sediment cell approach that considers wave incident angle, sediment balance and length of the cell on the shoreline stability.

The coastal erosion driver significances have been adjusted in the study using the coping capacities corresponding to each cell, based on the physical coast protection structures. The final rank of the degree of erosion in each cell was determined in a reference scale. The coastal erosion profile is useful for designing setback systems in coastal management and strategic planning bearing in mind the uncertainties associated in modelling and data limitations.

Coastal erosion has been and is still posing a serious problem for coastal management authorities and the population in along the coast of Sierra Leone. This phenomenon which is very evident along the Sierra Leone coastline has attained rates of some 4 -6 metres per year in some locations (e.g. Konakridee, Lumley, Lakka, Hamilton etc.)[1]. Other areas with visible erosion signs along coast include: Krim area, Shenge, Plantain Island, Katta and Bunce Island, Adonkia, Mahera beach in Lungi area, Bullom shores, Moa wharf, and Man of War Bay[2].

National Profile

Parameters

Scale

1

2

3

4

5

Frequency

Very Rarely

Rarely

Sometimes

Often

Frequently

Magnitude

Trivial

Small

Moderate

Large

Very Large

Duration

Very Short

Short

Average

Long

Very Long

Areal Extent

Limited

Very Sparsely

Sparsely

Densely

Widespread

Spatial Predictability

Highly Predictable

Predictable

Likely

Randomly

Very Randomly

Speed of onset

Very Slow

Slow

Moderate

Fast

Very Fast

Importance

Not Important

Somewhat Important

Moderately

Important

Very Important

Spatial Dispersion

Very Concentrated

Concentrated Moderately

Moderately

Diffused

Widely Diffused

District Profile

Area/District

Frequency Scale

Magnitude Scale

1

2

3

4

5

1

2

3

4

5

Western Area

 

 

 

 

 

 

 

 

 

 

Bo

 

 

 

 

 

 

 

 

 

 

Bonthe

 

 

 

 

 

 

 

 

 

 

Moyamba

 

 

 

 

 

 

 

 

 

 

Pujehun

 

 

 

 

 

 

 

 

 

 

Bombali

 

 

 

 

 

 

 

 

 

 

Port Loko

 

 

 

 

 

 

 

 

 

 

Tonkolili

 

 

 

 

 

 

 

 

 

 

Kambia

 

 

 

 

 

 

 

 

 

 

Koinadugu

 

 

 

 

 

 

 

 

 

 

Kenema

 

 

 

 

 

 

 

 

 

 

Kono

 

 

 

 

 

 

 

 

 

 

Kailahun

 

 

 

 

 

 

 

 

 

 

[1] Johnson, R. G. (2006). Coastal Erosion Issues in Sierra Leone: Adaptation, planning and implementation relating to the Sierra Leone coastal zone. National Adaptation Programme of Action (NAPA) Project for Sierra Leone. UNFCCC African Regional Workshop on Adaptation, Accra. Ghana, September.

[2] Tarawalli, P. (2012). Diagnostics Analysis of Climate Change and Disaster Management in Relation to the PRSP III in Sierra Leone. Freetown: UNDP - SL.