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| Minh, Vo Quang; Giao, Nguyen Thanh. |
| The main objective of this study is to assess the monitoring system of surface water quality in Can Tho using Principal Component Analysis (PCA) and Cluster Analysis (CA). Water samples were monthly collected in 2020 at 35 sampling sites and then analyzed for 18 parameters including temperature, pH, turbidity, dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), ammonium (NH4+-N), nitrate (NO3ˉ-N), nitrite (NO2ˉ-N), orthophosphate (PO43ˉ-P), chromium (Cr), fluoride (F-), arsenic (As), lead (Pb), mercury (Hg) and coliform. These values were compared with the national technical regulation on surface water quality and calculated water quality index (WQI). The findings indicated that surface water... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2024 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8273 |
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| Minh, Vo Quang; Vu, Pham Thanh; Du, Thai Thanh; Khoa, Le Van; Tinh, Tran Kim. |
| The soil organic carbon (C) content played an important factor in soil fertility for crop yield, but in wider regions, the estimation in the fields require costly to analyze. The study objectives were to use soil color as an indicator for assessment and correlation with the soil organic C content as the soil degradation indicator from 82 soil samples of the study area in Hau Giang province, Vietnam. The results showed that when the soil has the same humidity, the soil has a different Value and Chroma but the same Munsell Hue color. The organic C content is ranging from 1,32 to 5.6%. There was the negative significant correlation between Munsell soil color properties and organic C content, as Value (r = -0.75** air-dry, r = -0.74** moist); Chroma (r=... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2023 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7885 |
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