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Written by Administrator   
Thursday, 12 November 2009 12:51

Marine Information Sub-Division

GISTDA currently operates a marine environmental monitoring system that

integrates data collection using buoy network and data analysis with an advanced computerized system for distribution of marine information to interested operators and/or authorities. The SEAWATCH project started in 1991 under co-operation between the National Research Council of Thailand (NRCT), OCEANOR, the Oceanographic Company of Norway, and other involving parties, including the Harbour Department, the Meteorological Department, Port Authority of Thailand, Naval Hydrographic Department, Department of Fisheries, the Petroleum Authority of Thailand, Marine Police Division, Chulalongkorn University, Kasetsart University, Prince of Songkla University, Burapha University, etc. Since November 2, 2000 , Geo-Informatics and Space Technology Development Agency (GISTDA) was officially established and the activity was then transferred to GISTDA as Marine Information Sub-Division. Due to the implementation of TDBOC, Thailand is now recognized as a nation following up with the Global Ocean Observing System (GOOS).



 

Program Objectives

 

• To set up a marine database using technological integration of remote sensing, buoy network, and meteorological data.

• To archive and distribute marine data and information to involving offices both in governmental and private sectors to be used in national resources development and management.

• To coordinate and work with other offices in the studies and researches in the field of oceanography and marine resources.

• To coordinate and work with involving offices in the utilization of marine data and information in national resources planning, development, preservation.

• To distribute the knowledge and technology in the use of marine data and information for the development and management of national resources.

 

Program Activies

Data Acquisition A real time data covering is provided by a network of moored data buoys

(called SEAWATCH buoys and BLUE buoys in Phase II, TOBIS buoys in Phase I), for measurement of meteorological parameters (wind speed & direction, air temperature & pressure) and oceanographic parameters (oxygen content, light attenuation, wave (wave height/period for Seawatch buoys, and wave direction for Blue buoy), currents, temperature/salinity profile, radioactivity). The buoys have also their own data logging equipment, on-board processing (for data analysis & quality control), and a transmission system.

During Phase I, Buoy-measured data is transmitted from the buoys to NRCT via ARGOS system, allowing the transmission of 6-10 data sets per day. In phase II, each new buoys are equipped with the INMARSAT transmitter, capable of sending hourly data. ARGOS system was used as a backup system for buoy positioning. Data Storage, Analysis and Presentation Buoy data is processed and stored in ORKAN database, which is also used in presentation, time and frequency analysis, and data import/export.



http://ocean.gistda.or.th/images/stories/imgwgistda/andamanpos.jpghttp://ocean.gistda.or.th/images/stories/imgwgistda/pacificpos.jpg



 

Buoy locations in Phase I

First Deployment Date

1. Sichang island, Chonburi

11 December 1991

2. Rayong bay, Rayong

12 December 1991

3. Chang Island , Trad

19 December 1991

4. Plathong Platform

22 July 1992

5. Tao Island , Chumporn

12 February 1993

6. Songkhla

10 March 1993

7. Huahin, Prachuap Khirikhan

31 March 1993

 

Buoy locations in Phase II

First Deployment Date

1. Sichang island, Chonburi

11 December 1991

2. Rayong bay, Rayong

12 December 1991

3. Chang Island , Trad

19 December 1991

4. Plathong Platform

22 July 1992

5. Tao Island , Chumporn

12 February 1993

6. Songkhla

10 March 1993

7. Huahin, Prachuap Khirikhan

31 March 1993

8. Petchaburi

24 December 2002

9. Phuket

23 April 1996

10. Rawi, Satun

2 May 1996

Data Distribution Buoy data in the form of hard copies can be requested directly from GISTDA. The data sheets can be sent by fax or mail to users. Data in the table format or postscript plot files can be stored in the diskette and picked up by the users or sent by mail. The followings are the report's formats, which can be generated:

·     Table of Parameters

·     Joint Occurrence Table

·     Time Series Plot

·     Rose Vector Diagram

·     Progressive Vector Diagram

·     Extreme Parameter Analysis

Data Utilization Buoy data can be used for many purposes including: • Weather forecast

• Planning, managing and monitoring aqua-cultures, plants and commercial fishing

• Environmental preservation for tourist industry & future generations

• Providing design parameters for onshore and offshore structures

• Analysis of marine pollution from sewage outfalls, industry and offshore installations

GISTDA Researches

• Processing and Analysis of Meteorological and Oceanographic Data from Buoy Network of SEAWATCH Thailand during 1992-2000

• The Use of RADARSAT for Monitoring Oil Spill and Oil Seep in the Gulf of Thailand

• The Use of Sea Surface Temperature Retrieved from ASTER images to Determine Water Properties of the First Monsoon Transition Period in the Upper Gulf of Thailand

Last Updated on Friday, 12 February 2010 19:27
 

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