NATURAL HAZARD MITIGATION WORKSHOP
ANTIGUA AND BARBUDA
August 16 17, 2000
WORKSHOP REPORT
prepared by Cassandra T. Rogers, Ph.D.
for USAID / OAS Post-Georges Disaster Mitigation Project
August 31, 2000
Table of Contents
List of Tables
Table 1a Availability of Hazard Data: Earthquake Hazard
Table 1b Availability of Hazard Data: Storm Surge Hazard
Table 1c Availability of Hazard Data: Flood Hazard
Table 2 Summary of Hazard Assessment Requirements for Priority Hazards
Table 3 Critical Facility Categories and Supporting Agencies
Table 4 Terms of Reference Guidelines for Natural hazard Map Suite
Table 5 Workplan for Hazard and Vulnerability Assessments
Appendix
Table 1 Workshop Agenda
Table 2 List of Participants
Table 3 Results of Workshop Evaluation
1.0 Introduction
As part of the Post-Georges Disaster Mitigation (PGDM) Project, the United States Agency for International Development (USAID) through the Organisation of American States (OAS), is assisting the Government of Antigua and Barbuda and St. Kitts and Nevis with the development of natural hazard mitigation plans (NHMP). In fulfillment of Task 7 of the NHMP workplan, a natural hazard / vulnerability assessment prioritisation workshop was held at the Royal Antiguan Hotel in Antigua from August 16 to 17, 2000. This report summarises the workshop activities and recommendations.
2.0 Workshop Objectives
The objectives of the workshop were:
3.0 Workshop Description
The workshop agenda is presented as Table 1 of the Appendix. Twelve participants attended the first day of the workshop while 20 attended on the second day (See Table 2 of Appendix). Representatives from the National Office of Disaster Services (NODS), the Development Control Authority, the Ministries of Health, Tourism and Environment (Tourism Division), Labour and Home Affairs, the Antigua and Barbuda Public Utilities Authority, the Transport Board, the Government Information Service and the St. Vincent de Paul Society attended on both days. Representatives from the Ministries of Agriculture (Fisheries Division), Tourism and Environment (Environmental Division), the Insurance Sector, the Antigua and Barbuda Red Cross and the Caribbean Conference of Churches attended on the second day only.
The first day of the workshop was devoted to a review of hazard assessment methodologies, the identification and prioritisation of natural hazards and a data needs assessment for prioritised hazards. On Day 2, the methodologies for conducting simple and detailed vulnerability assessments were reviewed. This was followed by a data needs assessment for identified critical facilities at risk, and an exercise on vulnerability assessment. The latter part of the day was devoted to the development of guidelines for the terms of reference for the hazard assessment studies and a workplan for hazard and vulnerability assessments.
3.1 Hazard Prioritisation and Data Needs Assessment
In order to identify the natural hazards for which hazard assessments would be performed under the project, participants conducted a formal prioritisation exercise to identify the natural hazards of critical importance to Antigua and Barbuda. The prioritisation exercise employed a methodology which ranked the hazards on a relative ranking scale according to their probability, frequency, area of impact and magnitude. Using this methodology, six priority hazards were identified, viz.:
Tables 1a to 1c summarise both typical and existing hazard data for three of the priority hazards (storm surge, earthquake and flood). Similar data on wind, drought and erosion hazards were not generated, as the relevant information was not available by the dates of the workshop (See Section 5.0). Summaries of the hazard assessment requirements for each of the six hazards were developed during the workshop and are presented in Table 2.
3.2 Priority Critical Facilities and Needs Assessment
The workshop participants agreed that the project should focus on the following types of critical facilities:
As many of the sectors responsible for the identified critical facilities categories were not represented at the workshop, it was not possible to detail existing data on relevant critical facilities, nor identify data gaps. It was agreed that Mr. Phillip Harris of the Development Control Authority would be responsible for this task. Several supporting agencies and / or individuals agreed to be responsible for data collection and database development, once the data gaps were identified. These are indicated in Table 3.
3.3 Vulnerability Assessment Exercise
Participants were divided into four groups. Using the detailed methodology discussed, each group conducted a vulnerability assessment of one of the following critical facility categories:
4.4 Terms of Reference Guidelines and Workplan
Terms of reference guidelines for hazard assessment studies for the six priority hazards are presented in Table 4. A workplan was developed for both hazard and vulnerability assessment studies and is presented as Table 5.
4.0 Workshop Evaluation
A summary of the responses to the workshop questionnaire is presented in Table 3 of the Appendix. Participants rated the course as good or very good, and felt that the course had met its objectives and that it was very relevant to their jobs. All rated the course highly in terms of its success in improving their understanding of natural hazards and hazard mitigation planning. The performance of the consultant was rated as good or very good. All of the participants felt that handouts were helpful in understanding the workshop material. The large majority rated the physical facilities highly. Many participants lamented the fact that representatives from key sectors did not attend the workshop and expressed the need for the same participant from each sector to attend the series of project workshops, for purposes of continuity. Two participants wondered whether the poor attendance was related to late advertising.
5.0 Consultants Comments and Recommendations
The consultant notes the following:
The following are recommended:
TABLES
Table 1a: Availability of Hazard Data Earthquake Hazard
[SR suitability rating]
TYPICAL HAZARD DATA |
EXISTING DATA | |||||||
END PRODUCT | SOURCE DATA | COMMENTS | END PRODUCT | SR | SOURCE DATA | SR | COMMENTS | |
Isoacceleration map (shows peak ground acceleration) |
|
|
|
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Isointensity map |
|
|
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Isovelocity |
|
|
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Microzonation map (liquefaction) |
|
|
Data Gaps
MAP AND/OR SOURCE DATA | REQUIREMENTS- SCALE, FORMAT, DIGITAL TABLE, COVERAGE , ETC |
PGA, Intensity maps ok but require finer resolution | |
Liquefaction map, require DEM? | |
Table 1b: Availability of Hazard Data Storm Surge Hazard
TYPICAL HAZARD DATA | EXISTING DATA | |||||||
END PRODUCT | SOURCE DATA | COMMENTS | END PRODUCT | SR | SOURCE DATA | SR | COMMENTS | |
Storm Surge Hazard Map |
|
|
|
Maps show maximum wind, wave heights and storm surges likely to occur for 10, 25, 50 and 100 years |
Data Gaps
MAP AND/OR SOURCE DATA | REQUIREMENTS - SCALE, FORMAT, DIGITAL TABLE, COVERAGE, END PRODUCT TYPE ETC. |
Table 1c: Availability of Hazard Data Flood Hazard
TYPICAL HAZARD DATA | EXISTING DATA | |||||||
END PRODUCT | SOURCE DATA | COMMENTS | END PRODUCT | SR | SOURCE DATA | SR | COMMENTS | |
Flood Hazard Map |
|
|
|
? | Flood-prone maps not suitable for project purpose |
Data Gaps
MAP AND/OR SOURCE DATA | REQUIREMENTS - SCALE, FORMAT, DIGITAL TABLE, COVERAGE, END PRODUCT TYPE ETC. |
Require detailed flood hazard maps | |
Table 2: Summary of Hazard Assessment Requirements
Hazard Type: | Wind |
Coverage: | Antigua and Barbuda |
Hazard Product: | Maximum wind speeds for given return period |
Scale: | To be determined |
Level of Assessment: | Detailed |
Existing Data: |
|
Data Needs: |
|
Constraints: | - |
Comments / Recommendations: | Check Meteorological Office for wind records |
Hazard Type: | Storm Surge |
Coverage: | Antigua and Barbuda |
Hazard Product: | Storm surge hazard |
Scale: | Grid resolution: 200m |
Level of Assessment: | Detailed |
Existing Data: |
|
Data Needs: |
|
Constraints: | - |
Comments / Recommendations: |
|
Hazard Type: | Drought |
Coverage: | Antigua and Barbuda |
Hazard Product: | Drought Hazard / Drought Index |
Scale: | 1: 25000 |
Level of Assessment: | Detailed Methodology |
Existing Data: |
|
Data Needs: | To verify |
Constraints: | - |
Comments / Recommendations: |
|
Hazard Type: | Ground shaking |
Coverage: | Antigua and Barbuda |
Hazard Product: | Seismic Hazard Maps (peak ground acceleration, maximum mercalli intensity and maximum velocity for given return period) |
Scale: | 1: 25000 |
Level of Assessment: | Detailed Methodology |
Existing Data: |
|
Data Needs: |
|
Constraints: | - |
Comments / Recommendations: |
|
Hazard Type: | Flood |
Coverage: | Antigua and Barbuda |
Hazard Product: | Flood Hazard Map |
Scale: | 1: 25000 |
Level of Assessment: | Detailed Methodology |
Existing Data: |
|
Data Needs: |
|
Constraints: | - |
Comments / Recommendations: |
|
Hazard Type: | Erosion (Coastal and Inland) |
Coverage: | Antigua and Barbuda |
Hazard Product: | Erosion Hazard |
Scale: | 1: 25000 |
Level of Assessment: | Detailed Methodology |
Existing Data: |
|
Data Needs: | To be verified |
Constraints: | - |
Comments / Recommendations: | Check:
|
Table 3: Critical Facilities Categories and Supporting Agencies
Category | Agency* | |
1 | Medical | NODS |
2 | Utilities | APUA |
3 | Schools | NODS |
4 | Shelters | NODS |
5 | Infrastructure | DCA and Public Works |
6 | Government Buildings | NODS and Public Works |
7 | Tourism | D. Edwards |
8 | Agriculture | D. Black |
* Responsible for data collection and database development
Table 4: Terms of Reference Guidelines for Natural Hazard Map Suite
Hazard Type: | Wind, Storm Surge, Earthquake Hazard, Drought, Flood, Erosion (Coastal and Inland) |
Coverage: | Antigua and Barbuda |
Scale of Mapping: | Drought, Flood, Erosion - 1:25000 Wind, Storm Surge: 200 m grid resolution Ground Shaking 0.1 degrees |
Deliverables: |
|
Information to include on map sheet: |
|
Submission Date: | December 15, 2000 |
Other: | Project to specify projection, datum to be used |
Table 5: Workplan for Hazard and Vulnerability Assessments
TASK | DUTIES |
TIME / DEADLINE |
RESPONSIBILITY | |
6 | Compilation of data on hazards and resources at risk | Hazards: | 15/9/00 | |
Wind:
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Storm Surge:
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Drought:
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Ground Shaking:
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Flood:
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Erosion:
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Critical Facilities
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7 | Hazard / Vulnerability Prioritisation Workshop | Completed |
||
8 | Terms of reference for hazard mapping assessment contracts | Completed |
||
9 | Contracts by Project Coordinator to perform hazard assessments |
|
1/9 15/12 |
Consultants |
10 | Vulnerability Assessment Data Collection |
|
19/8 31/10 |
S. Stichter, Consultant, Supporting Agencies/Sectors |
11 | Vulnerability Assessment |
|
1/11 31/1 |
S. Stichter, Consultant, Supporting Agencies/Sectors |
APPENDIX
Table 1: Workshop Agenda
USAID/OAS POST-GEORGES DISASTER MITIGATION PROJECT
HAZARD / VULNERABILITY ASSESSMENT PRIORITISATION WORKSHOP,
ANTIGUA AND BARBUDA
August 16 17, 2000
Facilitator: Dr. Cassandra Rogers
AGENDA
Wednesday August 16
9.00 9.45 Opening Ceremony
9.45 10.00 Break
10.00 10.15 Introduction, Review of Definitions
Session 1 Hazard Assessment
10.15 12.15 Hazard Prioritsation Exercise
12.15 1.15 Lunch
1.15 3.00 Needs Assessment for Hazard Data
Review of Hazard Assessment Methodologies for Individual Hazards
Review of Typical Hazard Data
Review of Available Data
Data Gaps
3.00 3.15 Break
3.15 4.15 Needs Assessment for Hazard Data (Contd)
Thursday August 17
Session 2 Vulnerability Assessment
8.30 9.30 Vulnerability Assessment Methodologies
9.30 10.15 Needs Assessment
Definition of Resources at Risk
Data Availability
Data Gaps
10.15 10.30 Break
10.30 12.15 Vulnerability Assessment Exercise
12.15 1.15 Lunch
Session 3 TOR / Workplan
1.15 2.30 Terms of Reference for Hazard / Vulnerability Assessments
2.30 2.45 Break
2.45 3.45 Workplan
3.45 4.00 Closing Ceremony
Table 2: List of Participants
August 16 and 17, 2000
FIRST NAME | SURNAME | ORGANIZATION | POST | TEL | FAX | |
Desiree | Edwards | Min of Tourism & Environment | HRD & Training Officer | 462-4625 | 462-6398 | [email protected] |
Greg | Faustin | Development Control Authority | Civil Engineer | 462-6426 | 462-6427 | [email protected] |
Rosemary | Georges | Local Coordinator, PGDM | ||||
Phillip | Harris | Development Control Authority | Physical Planner | 462-6427 | 462-6427 | [email protected] |
Harry | Josiah | Transport Board | Dep. Gen. Manager | 460-8300 | 460-8302 | |
Rose | Margetson | St. Vincent De Paul Society | Ass to Diocesan | 462-0496 | 462-2383 | [email protected] |
Philmore | Mullin | NODS | Deputy Director | 462-4206 | 462-4742 | [email protected] |
Easton | OGarro | CBH | Public Health Inspector | 462-2936 | ||
Milton | Pringle | APUA-Planning | Coordinator-Planning | 480-7256 | 462-4233 | |
Patrick | Rayn | GEO. W. Bennette Bryson | Director of Operations | 480-1296 | 462-0325 | [email protected] |
Isaac | Robelto | Min of Labour & Home Affairs | President Ass Sec | 462-4733 | 462-1595 | |
Frederick | Southwell | Development Control Authority | Physical Planner | 462-2038 462-6426 |
462-6427 | [email protected] |
Steven | Stichter | OAS | PGDM Technical Coordinator | 202-458-3300 | 202-458-3560 | [email protected] |
Gus | Thomas | Gov. Information Service | Coordinator | 464-3622 | [email protected] |
August 17th, 2000 only
FIRST NAME | SURNAME | ORGANIZATION | POST | TEL. | FAX | |
Dianne | Black-Lane | Environment Division | Chief Environmental Officer | 462-4625 | 462-6398 | [email protected] |
Patricia | Bird | Min of Labour & Home Affairs |
Commissioner of Social Improvement | 462-5247 | ||
Era | Birk | Red Cross | Training Officer | 462-0800 | 460-9595 | [email protected] |
Joan | Gomes | Min of Labour & Home Affairs |
Social Development Officer | 462-5247 | ||
Harry | Hobson | Anjo Insurance | Claims Manager | 480-3050 | 480-3064 | [email protected]
|
Philmore | James | Fisheries Division | Senior Fisheries Officer | 462-372/6106 | 462-1372 | [email protected] |
Michael | Mason | Antigua & Barbuda Red Cross | Volunteer Member | 462-0800 | 460-9595 | [email protected] |
David | Spencer | Caribbean Conference of Churches | Senior Programme Officer | 462-0261; 462-2597/8 | 462-1854 | [email protected] |
Table 3: Results of Workshop Questionnaire
USAID/OAS
POST-GEORGES DISASTER MITIGATION PROJECT
NATURAL HAZARD / VULNERABILITY ASSESSMENT
PRIORITISATION WORKSHOP
ANTIGUA AND BARBUDA
August 16-17, 2000
Workshop Questionnaire
12 Responses
In an effort to improve the quality of subsequent courses, please answer the following questions.
Please use the following rating system to answer all questions, except question 6, 7 and 8.
1 = Very Poor; 2 = Poor; 3 = Fair; 4 = Good; 5 = Very Good; n/a = not applicable.
1. How would you rate the following:
2. Were the handouts helpful in improving your understanding of the course material? 4.3
3. Was the course helpful in improving your understanding of natural hazards and hazard mitigation planning: 4.0
In your current job?
4. Did the course meet its objectives? 4.2
5. How would you rate the course on an overall basis? 4.3
6. Do you intend to use this information directly in your current job? Explain.
7. How could the course be improved?
8. Add any additional comments here.