CDMP Storm Hazard Atlas: Montserrat - PowerPoint PPT Presentation

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CDMP Storm Hazard Atlas: Montserrat

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Montserrat. Probable Storm Effects. Montserrat. Redonda ... Montserrat. 10-Year Return Time. Winds. Ross Wagenseil. for CDMP. January 2000. CDMP. 16.5 N ... – PowerPoint PPT presentation

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Title: CDMP Storm Hazard Atlas: Montserrat


1
Montserrat Probable Storm Effects
The projection of the illustrations is Plate
Carrée, a square grid of latitude and longitude.
Resolution is 30 arc-seconds. North-South
distances are true to scale. East-West distances
are stretched 4.3 at 16.5 degrees North, and
stretched 4.6 at 17.0 degrees North. All model
results were calculated using great-circle
distances based on the WGS84 datum.
Redonda
Points of Interest
1. Little Bay Small cove village on steep
western shore
Little Bay
1
2. Plymouth Main town on a steep shore facing
southwest.
Montserrat
Note Waves and surges for Points of Interest
are reported from the nearest cell offshore.
2
Plymouth
N
  • This set of maps is part of Section 2 of the
    Atlas of Probable Storm Effects in the Caribbean
    Sea, which was sponsored by the Caribbean
    Disaster Mitigation Project (CDMP), a joint
    effort of the Organization of American States
    (OAS) and the US Agency for International
    Development (USAID). These maps are a result of
    new techniques for modeling storms and
    estimating the probabilities of storms, developed
    in part under the patronage of CDMP. Refer to
    the Atlas for explanatory materials.
  • WINDS represent sustained 1-minute winds at 10 m
    above the surface, and include both surface
    friction and topographic effects at a resolution
    of 30 arc-seconds. Friction factors derive from
    a Level I land-cover classification, with water,
    forest and open land predominating. If using
    wind damage models or building codes which
    internally include surface friction or
    topographic corrections, the nearest open-water
    wind speed from one of these maps may be used as
    input. Careful judgement is advised in reading
    and applying the values.
  • SURGES include astronomical tide and setups from
    pressure, wind and wave, but not wave runup.
    Surges over land are shown as elevation above sea
    level, not water depth.
  • WAVES are the heights of wave crests above the
    storm surge level in open water. Shoreline
    effects do not appear at this resolution.

2
Winds
10-Year Return Time
Montserrat
1. Little Bay 34 m/s
1
2. Plymouth 34 m/s
2
N
3
Waves
10-Year Return Time
Montserrat
1. Little Bay 4.3 m
1
2. Plymouth 4.2 m
2
N
4
Surges
10-Year Return Time
Montserrat
1. Little Bay 0.3 m
1
2. Plymouth 0.3 m
2
N
5
Winds
25-Year Return Time
Montserrat
1. Little Bay 44 m/s
1
2. Plymouth 44 m/s
2
N
6
Waves
25-Year Return Time
Montserrat
1. Little Bay 5.5 m
1
2. Plymouth 5.5 m
2
N
7
Surges
25-Year Return Time
Montserrat
1. Little Bay 0.5 m
1
2. Plymouth 0.5 m
2
N
8
Winds
50-Year Return Time
Montserrat
1. Little Bay 51 m/s
1
2. Plymouth 51 to 52 m/s
2
N
9
Waves
50-Year Return Time
Montserrat
1. Little Bay 6.4 m
1
2. Plymouth 6.4 to 6.5 m
2
N
10
Surges
50-Year Return Time
Montserrat
1. Little Bay 0.7 m
1
2. Plymouth 0.8 m
2
N
11
Winds
100-Year Return Time
Montserrat
1. Little Bay 58 m/s
1
2. Plymouth 58 to 59 m/s
2
N
12
Waves
100-Year Return Time
Montserrat
1. Little Bay 7.2 m
1
2. Plymouth 7.3 m
2
N
13
Surges
100-Year Return Time
Montserrat
1. Little Bay 0.9 m
1
2. Plymouth 1.1 m
2
N
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