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Study on the Impact of Fish Farming in Cages on Water Quality and Soil Quality in the Rainy and Summer Seasons in the Klong Lam Chan Area Khok Saba Subdistrict, Na Yong District, Trang Province

Organization(s):Wichienmatu
Country:Thailand
Student(s):Miss Phichaon Somprathan Miss Paphawadee Nuwong Miss Supanuch Kareem Mr.Chanakan Phetphrom
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Member(s):Jiraporn Sirirat
Contributors:
Report Type(s):Virtual Science Symposium Report
Protocols:Clouds, Relative Humidity, Alkalinity, Conductivity, Dissolved Oxygen, Nitrates, pH, Salinity, Water Temperature, Water Transparency, Soil Fertility, Soil pH, Soil Temperature, Soil Moisture - Gravimetric
Presentation Poster: View Document
Language(s):English
Date Submitted:2026-01-30
This study examines water and soil quality during the rainy and dry seasons in the Khlong Lam Chan area, Khok Saba Subdistrict,Na Yong District, Trang Province, to investigate the impact of fish farming in cages. Water quality parameters measured included temperature, pH, transparency,dissolved oxygen, electrical conductivity, salinity, water hardness, nitrate, ammonia, and nitrite. Soil quality parameters measured included nitrogen, phosphorus, potassium, electrical conductivity, salinity, pH, temperature, and soil moisture.
This research aimed to investigate the water quality at areas above, within, and below fish cages, as well as the soil quality in the surrounding vicinity. The study compared variations between the rainy and summer seasons.The results indicated that water quality within and below the fish cages exhibited higher levels of Electrical Conductivity 32.625 -34.125 µS/cm, Water Hardness 44.43- 46.875 mg/l, and Ammonia 0.38-0.47 mg/l compared to the area above the cages. Conversely, pH and Oxygen levels were lower in the cage and downstream areas. Parameters such as Temperature, Transparency, and Nitrite remained relatively similar across all locations.Regarding seasonal variations, Temperature, pH, Transparency, and Oxygen levels were similar in both seasons, with average temperatures ranging from 29.62-30.5°C, pH at 5.5, and Transparency at 0.7 m. However, the summer season showed significantly higher values for Electrical Conductivity 33.38 µS/cm, Salinity 61.25 ppt, and Water Hardness 45.66 mg/l than the rainy season. When compared to surface water quality standards, the water was classified as Type 1 natural quality water.Soil quality analysis revealed that the rainy season had lower levels of Nitrogen, Phosphate, Potassium, Electrical Conductivity, and Salinity compared to the summer. In contrast, soil pH and relative humidity were higher in the rainy season, while soil temperature was lower.In conclusion, seasonality significantly impacts water and soil quality transitions around fish cages. These findings should be utilized for monitoring and environmental management to ensure appropriate and sustainable aquaculture practices


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