Đánh giá chất lượng nước sông Hàm Luông - Đoạn chảy qua Thành phố Bên Tre thông qua chỉ số WQI và khả năng chịu tải của sông

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Tác giả: Tiến Thịnh Lê, Ngọc Trinh Nguyễn, Thị Thu Hiền Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Môi trường, 2023

Mô tả vật lý: tr.45818

Bộ sưu tập: Metadata

ID: 344056

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Ben Tre City, with a total natural area of 2394.82 km2 and a population of 1,289,908 people as of April 1, 2019 [11], is traversed by the Ham Luong River, which stretches over 70 km, flowing entirely within its territory. Concurrent with socio-economic development, the issue of water pollution in the Ham Luong River has become a pressing concern for the local community. This study aims to evaluate the water quality of the Ham Luong River, specifically the section that runs through Ben Tre City, during two distinct seasons: the dry season and the rainy season, spanning from 2019 to 2021. The findings reveal that the VN-WQI (Vietnam Water Quality Index) values during the dry season fluctuate between 71 and 90 (yellow to green), which is higher compared to the values during the rainy season, ranging from 68 to 89 (yellow to green). Generally, surface water quality tends to be better during the rainy season than in the dry season. It is noteworthy that the river's capacity to directly receive wastewater from five monitoring locations exceeds the carrying capacity of the Ham Luong River section passing through Ben Tre City. This research serves as a foundational resource to assist environmental managers in implementing suitable measures to mitigate water pollution in the Ham Luong River.Thành phố Bến Tre với tổng diện tích tự nhiên 2394,82 km2, dân số tính đến ngày 1/4/2019 là 1289908 người [11], có sông Hàm Luông với chiều dài trên 70 km, chảy trọn vẹn trên toàn địa phận tỉnh. Cùng với sự phát triển kinh tế - xã hội, việc ô nhiễm nguồn nước sông Hàm Luông cũng đang là vấn đề nhức nhối của địa phương. Nghiên cứu này tập trung đánh giá chất lượng nước sông Hàm Luông - đoạn chảy qua TP. Bến Tre vào hai mùa: mùa khô và mùa mưa thông qua chỉ số chất lượng nước (WQI) trong giai đoạn 2019 - 2021. Kết quả cho thấy, giá trị VN – WQI ở mùa khô dao động từ 71 - 90 (vàng - xanh), cao hơn mùa mưa 68 - 89 (vàng - xanh) và chất lượng nước mặt vào mùa mưa thường có xu hướng tốt hơn vào mùa khô. Khả năng tiếp nhận trực tiếp nước thải từ 5 vị trí quan trắc đều vượt quá khả năng chịu tải của sông Hàm Luông đoạn chảy qua TP. Bến Tre. Nghiên cứu là cơ sở giúp cho các nhà quản lý môi trường có được những biện pháp phù hợp để hạn chế ô nhiễm nguồn nước sông Hàm Luông.

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