International workshop on flash floods forecasting 13 17 march 2006 san jose costa rica l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 27

International Workshop on Flash Floods Forecasting 13-17 March 2006, San Jose, Costa Rica PowerPoint PPT Presentation


  • 249 Views
  • Updated On :
  • Presentation posted in: Travel / Places

International Workshop on Flash Floods Forecasting 13-17 March 2006, San Jose, Costa Rica. Development of Equipment for Community Flash Flood Warning in the Caribbean and the Central America.

Related searches for International Workshop on Flash Floods Forecasting 13-17 March 2006, San Jose, Costa Rica

Download Presentation

International Workshop on Flash Floods Forecasting 13-17 March 2006, San Jose, Costa Rica

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


International workshop on flash floods forecasting 13 17 march 2006 san jose costa rica l.jpg

International Workshop on Flash Floods Forecasting 13-17 March 2006, San Jose, Costa Rica

Development of Equipment for Community Flash Flood Warning

in the Caribbean and the Central America

Hidetomi Oi Japan International Cooperation Agency (JICA)

Jacob Opadeyi West Indies University in Trinidad and Tobago


History of development of equipment l.jpg

History of development of equipment

  • After hurricane Mitch in 1998, a person of CEPREDENAC invented a water level gauge: cheap and simple but much more functional than the conventional stuff gauge. Many communities in Central America have now warning system using this equipment.

  • In 2003 the equipment was presented at a conference in Jamaica. A participant from CDERA thought rain gauge should also be improved applying the same concept.


Slide3 l.jpg

  • In 2004 a new type of rain gauge was manufactured in Japan and was donated to a community project in the Philippines.

  • In 2005, improvement was made with the equipment (increase in the number of sensors from 1 to 3). The improved one was installed in a community in Barbados.

  • In 2006, a group of engineers of UWI volunteered to make further improvement (automatic dialing to residents). The new one will be used for community projects in CDERA member states to start in 2006.

  • Mass production is necessary to cover so many communities at risk of floods, while continuing effort for improvement. Problem is lack of fund.


Slide4 l.jpg

What is new? What are advantages ? What are limitations?

Answers will be given by the following examples.

Reventado

Caparo

Speightstown


Community flood warning for reventado in costa rica l.jpg

Community Flood Warning for Reventado in Costa Rica

- Example of using the new water level gauge -


Slide6 l.jpg

Rio reventado

Taras, Los Diques

Afectado x avalancha

1964

Costa Rica. Effects by avalanches. Area Reventado Watersheds and Los Diques

Communities.

Cartago. Reventado watershed. A big avalanche in 1964related with volcanic deposits and different materials (ash & piroclast) combined with heavy rains.


Slide7 l.jpg

Installation of water level gauge

Costa Rica


Slide9 l.jpg

ADVANTAGES

  • Cheap, easy O/M

  • Heavy rain is monitored even if it occurs in the midnight.

  • Presently, the gauge readers have to remain stand-by when alerted by weather forecast of possible heavy rainfall. But with this equipment, they are free until alarmed by buzzer/lamp.


Community flood warning for speightstown in barbados l.jpg

Community Flood Warning for Speightstown in Barbados

- Example of using the new rain gauge -


Barbados meteorological services bms flood warning 7 00 am monday november 22 2004 l.jpg

Barbados Meteorological Services (BMS) Flood Warning7:00 am Monday, November 22, 2004

Here is a Flood Warning from BMS.

A persistent trough that has been in the area for the last few days produced moderate to heavy showers during the night.

These conditions are expected to persist over the island today and with the saturated conditions of the ground any additional rain is likely to produce flooding in some areas.

Residents in flood prone areas should be on the alert and take the necessary precautions.

This warning will remain in effect until 4 pm today.


Slide12 l.jpg

Rainfall equipment with the alarm unitfor community operated flood warning

Fixed or Mobile Phone


Slide13 l.jpg

The buzzer sounds and the light turns on, and dials residents at the same time

Whenever accumulated rain reaches pre-set levels, then,


Conceptual system design l.jpg

Conceptual System Design


Features of the system l.jpg

Dept. of Surveying and Land Administration

The University of the West Indies, Trinidad

Jacob Opadeyi, PhD

Features of the System

  • The system is capable of detecting 3 predefined rainfall levels.

  • The device generates an audible alarm based upon the changing rainwater levels.

  • The electronic of the system transmit alarm signals to a public or cell telephone using either landline or GSM network.

  • It is a stand alone system.


Features of the system16 l.jpg

Dept. of Surveying and Land Administration

The University of the West Indies, Trinidad

Jacob Opadeyi, PhD

  • When it rains, rainwater drips into the cylindrical container through the funnel place outside of the monitoring station.

  • When the rainwater reaches any of the three pre-determined level, the system will self-dial a call to a phone to the alarm level using 3 different rates of tones.

  • The system will dial a user-configured number within 6 seconds of any new level being crossed.

Features of the System


Features of the system17 l.jpg

Dept. of Surveying and Land Administration

The University of the West Indies, Trinidad

Jacob Opadeyi, PhD

  • The unit will output a unique level-dependent audible beep pattern approximately 2 minutes after any level has been exceeded. The unit remains silent otherwise.

  • Calls are repeated every 5 mins

  • The unit identifies itself using caller-ID.

  • The phone number is stored in non-volatile system memory.

  • Currently operates ONLY with 115V AC.

Features of the System


System requirements l.jpg

Dept. of Surveying and Land Administration

The University of the West Indies, Trinidad

Jacob Opadeyi, PhD

SystemRequirements

  • The device should be installed on a house or a remote monitoring station.

  • The station should have a direct phone line to be used for initiating calls

  • The station should be wired with 110V electric power with outlet for the system

  • The landline or cell phone capable of receiving calls 24/7 within the territory


Slide19 l.jpg

Flood Hazard Map of Speightstown, Barbados


Slide20 l.jpg

ADVANTAGES

  • Cheap, easy O/M;

  • Sudden rise in water level can be detected even if it occurs in the midnight;

  • Gauge readers no more need to go out to the gauging sites under the risky condition of wind storm, in the midnight etc.


Community flood warning for caparo in trinidad and tobago l.jpg

Community Flood Warning for Caparo in Trinidad and Tobago

- Introduction of the new water level gauge is under consideration-


Slide22 l.jpg

EX. OF COMMUNITY OPERATED FLOOD WARNING

Caparo river, Trinidad

10 year flood

50 year flood

5 year flood

2 year flood


Slide23 l.jpg

Stuff gauge for community flood warning

Problem: Difficult to go to the sites under heavy rainfall and strong wind


Advanced systems l.jpg

Advanced Systems


Recommendation 1 l.jpg

Recommendation (1)

  • WMOwill support national/regional institutes to produce/improve equipment for community flood warning and to test/evaluate the appropriateness to different conditions, and will officially announce the result.


Recommendation 2 l.jpg

Recommendation(2)

  • WMO, NOAA and other leading agencies will take actions for the more closer cooperation between:

    - meteorologists, hydrologists and disaster managers

    - all levels, central level through community level.

  • Representatives from all levels will be invited to this kind of meetings in the future.

  • Manuals, guidelines etc. will be prepared to cover not only advanced technologies but also primitive ones so that governments and local groups may chose whatever most appropriate to their respective conditions, natural, social, human, financial etc.

  • In conclusion, in order to attain the goal (protect lives and properties) community based flood warning should be promoted while continuing effort for the advancement of high-technology and its application.


Thanks l.jpg

Thanks

For further information please contact:

[email protected]

[email protected]


  • Login