ĐÁNH GIÁ CHẤT LƯỢNG NƯỚC MẶT VÀO MÙA KHÔ Ở KHU BẢO TỒN ĐẤT NGẬP NƯỚC LÁNG SEN, HUYỆN TÂN HƯNG, TỈNH LONG AN

The study was conducted to assess the current status of surface water quality in Lang Sen Wetland Reserve, Long An Province. Surface water quality of the reserve was surveyed in the dry season at 5, 6, 9, 10, 11 and 12 sub-zone (3 sample points/ sub-zone) using physical and chemical parameters of water. The results showed that the concentrations of total suspended solids, dissolved oxygen, chemical oxygen, total nitrogenof water in the sub-zones ranging 16.8-30.9; 0.67-1.73; 15.5-44.3; 0.99-3.34 mg/l, respectively, not meeting the standard justified in QCVN 08:2023/BTNMT. In addition, the electrical conductivity, total dissolved solids, turbidity, and nitrite nitrogen were also high that may affect aquatic organisms. Therefore, it is necessary to take measures to effectively monitor and manage water quality, especially in sub-zones 9 and 10 to ensure a favorable water environment for the conservation of large fish species in the reserve.