Information system for water quality management in the lower part in Songkhla Lake

Information system for water quality management in the lower part in Songkhla Lake
การจัดทำระบบข้อมูลสารสนเทศเพื่อการจัดการคุณภาพน้ำบริเวณทะเลสาบสงขลาตอนล่าง

Danupon Tonnayopas, Asst. Prof., D. of Mining and Materials Eng., F. of Eng., PSU.
Pornsilp Pholpunthin, Asst. Prof., D. of Biology, Faculty of Sci., PSU.
Chao Yongchalermchai, D. of Earth Sci., F. of Natural Resources, PSU.
Anon Kumpeera, Southern Remote Sensing and GIS Center, Office of Research and Development, PSU.
Suchada Yongsathid, Southern Remote Sensing and GIS Center, Office of Research and Development, PSU.
Corresponding e-mail : tdanupon@ratree.psu.ac.th

Grant : Prince of Songkla University
Published : Research Report
Key words : GIS, Songkhla Lake, water quality

Information system for water quality management in the lower part of Songkhla Lake was evaluated the relative vulnerability of water in Songkhla Lake to contamination from waste water flowed from dwelling and industries around the lake by using a geographic information system (GIS)

From vital parameters values consisted of depth of water, transparency, temperature, pH, dissolved oxygen, salinity, dispersion sediment, chlorophyll A, B and C, chlorinity, chlorocity, nitrite, nitrate, ammonia, silicate, phosphate and sulfate. Some their parameters values showing good correlation in linear regression level 1, either physical or nutrient compositions parameters. These evaluated criterias could be confirmed that the system of information was established in high signi-ficance.

GIS-derived values of digitized maps were extracted from a variety of sources, including the Landsat 5 TM imagery, published topographic and hydrogeologic maps. Addition to computerized maps were generated contours for the several physical factors that giving view point of boundary and distribution for water quality in the lake.

This knowledge-based system will include information that would allow policy makers to deal more efficiently with water resource and management and development issues at regional and national levels.

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