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The Study of Water Quality in the Area of Huai Yang Reservoir and Huai Thap Than Stream, Huai Thap Than District, Sisaket Province

Organization(s):Phakmaiwittayanukul school
Country:Thailand
Student(s):Mr. Chotipon Sampao, Miss. Warattaya Sopa, and Miss. Thanaporn Sanga-ngam
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Educator(s):Darunee Samerpak
Contributors:Mrs. Darunee Samoephak, Miss Sasiwimon Phaengma and Mr. Samruan Samerpak
Report Type(s):International Virtual Science Symposium Report
Protocols:Conductivity, Dissolved Oxygen, Nitrates, pH, Water Temperature, Water Transparency
Presentation Video: View Video
Presentation Poster: View Document
Language(s):English, Thai
Date Submitted:03/05/2025
The Study of Water Quality
This research aims to study and compare the water quality in the area of Huai Yang Reservoir and Huai Thap Than Stream, Huai Thap Than District, Sisaket Province, based on different data collection, time and sampling locations. A total of 54 samples were collected from three study sites: 1.Upstream (Ban Or Village) – A densely populated area. 2.Midstream (Huai Yang Reservoir) – A popular tourist spot with dense habitation. 3.Downstream (Huai Thap Than Stream) – An area with riparian forest along the riverbanks, spanning 6.3 km. Water samples were collected once per month for three months, from November 2024 to January 2025, measuring six physical and chemical parameters: water temperature, electrical conductivity (EC), dissolved oxygen (DO), pH, nitrate concentration, and phosphate concentration.The research findings showed the following results across the three study sites:Water temperature: 27–32°C.Electrical conductivity (EC): 68–73 µS/cm.pH level: 7.2 –7.80.Dissolved oxygen (DO): 9.30–10.37 mg/L.Nitrate concentration: 0.26–0.27 mg/L.Phosphate concentration: 0.07–0.12 mg/L.As a result of applying a one-way ANOVA analysis using Scheffe’s method to compare water quality across months and sampling locations, it was found that water temperature differed significantly between December and January at a statistical significance level of 0.05. Keywords: Water quality, parameter values


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