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KMID : 1024520190280110935
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Journal of the Environmental Sciences
2019 Volume.28 No. 11 p.935 ~ p.942
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Statistical Analysis of Paddy Water Properties and Variational Factors on Chl-a in Rice Paddy Field
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Bae Hui-Su
Jang Hyeon-Soo
Hwang Jae-Bok
Ahn Seung-Hyun
Youn Jong-Tak
Kim Uk-Han
Bae Beom-Soo
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Abstract
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Statistical analysis was carried out to identify the influence on environmental factors between paddy water chemical properties and Chl-a concentration (algae biomass index) using water samples collected in June for 3 years at rice paddy field. As a result of correlation analysis, there was a significantly negative relationships in DO(-0.366) and pH(-0.141). In contrast, significantly positive relationships were founded in COD(+0.431) and TOC(+0.422). According to the result of factor analysis, 3 factors were obtained and indicated that PC1 were Ca, K, Mg cation, PC2 were TOC, T-P, PO4 3--P and DO, and PC3 were T-N and NH4 +-N. As a result of linear regression analysis to develop a prediction model for chl-a concentration, the total amount of explanation was 20.6%, PC2 had the greatest influence on the increase of chl-a concentration and PC1 also showed a positive correlation but the PC3 has a negative correlation. In conclusion, carbon and phosporous content are the main factors for the increase algae blooms of rice paddy.
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KEYWORD
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Freshwater algae, Factor analysis, Eutrophication, Chl-a content
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