Student Research Reports
The Effects of Seasons on Water Quality Changes at Wonnapha Beach
Organization(s):Princess Chulabhorn Science High School Chonburi
Country:Thailand
Student(s):Sorachat Naknun
Nasikan Nithisihawat
Naphada Boonjan
Grade Level:Middle School (grades 6-8, ages 11-14)
GLOBE Member(s):Thapanee Ouppatham, Jantarawan jantarakong, Suparat Kromsaeng
Contributors:Asst. Prof. Vichaya Gunbua
Report Type(s):Virtual Science Symposium Report
Protocols:Dissolved Oxygen, pH, Salinity, Water Temperature, Water Transparency
Presentation Poster:
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Language(s):English
Date Submitted:2026-01-27
The research, " The Effects of Seasons on Water Quality Changes at Wonnapha Beachâ, aims to study the changes in seawater quality during different seasons and analyze the relationship between rainfall and coastal water quality. Seawater samples were collected from Wonnapha Beach. According to the observation of seawater discoloration in July 2024, measurements of temperature, salinity, pH, dissolved oxygen (DO), and water transparency were taken, with supporting data from The Institute of Marine Science, Burapha University and Thai Meteorological Department (TMD). The study found that seasons significantly affect seawater quality, with water quality ranging from poor to fair during the summer, while it is fair to good during the rainy and winter seasons. The study found that increased rainfall leads to a decrease in salinity and DO levels due to the transport of sediment and nutrients from land-based sources to the sea. This promotes plankton growth and may be the cause of seawater discoloration, which could be related to climate change or global warming.