Hiện trạng và nguyên nhân ảnh hưởng đến chất lượng nước hồ Búng Bình Thiên, tỉnh An Giang

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Tác giả: Thị Việt Hương Đào, Thanh Hùng Nguyễn, Thị Bé Phúc Nguyễn, Thị Thùy Vân Nguyễn, Ngọc Châu Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Môi trường, 2023

Mô tả vật lý: tr.88-92

Bộ sưu tập: Metadata

ID: 340671

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Bung Binh Thien Wetland Reserve, a natural freshwater ecosystem located in An Phu district, is one of the largest lakes in An Giang province. It plays a vital role in providing water for local livelihoods, agricultural activities, and tourism. However, the water quality of the lake is being adversely affected by various factors associated with activities in its vicinity. These factors include decreasing lake levels during the dry season, flooding combined with rainfall during the wet season, direct boating activities on the lake, sewage from the residential area of Cua Ong Cai, water hyacinth covering the lake's surface, waste from Binh Di River flowing into the lake, and the discharge of floodwater combined with wastewater from the Sa To sewer and small Bung ditch. Based on the investigation and survey conducted from 2018 to 2022, the water quality of Bung Binh Thien Lake is deteriorating. Parameters such as total suspended solids (TSS), dissolved oxygen (DO), biochemical oxygen demand (BOD5 ), and total coliforms have reached the B1 column in comparison to the standards specified in QCVN 08:2015/BTNMT (the national technical regulation on surface water quality). This regulation defines the water quality required for irrigated agriculture or other purposes that necessitate similar water quality.Khu bảo tồn đất ngập nước Búng Bình Thiên (BBT), một hệ sinh thái nước ngọt tự nhiên tại huyện An Phú là một trong những hồ lớn nhất tại tỉnh An Giang, đóng vai trò rất quan trọng trong việc cung cấp nước cho sinh hoạt, sản xuất nông nghiệp và du lịch của địa phương. Tuy nhiên, chất lượng nước của hồ đang bị ảnh hưởng bởi nhiều yếu tố khác nhau từ các hoạt động xung quanh hồ như: sụt giảm mực nước hồ vào mùa khô, mùa lũ kết hợp mưa dầm nước Búng cũng bị ảnh hưởng, hoạt động du lịch trên thuyền thải trực tiếp vào lòng hồ, nước thải từ khu dân cư Cua Ông Cải, lục bình phủ bề mặt Búng quá nhiều, rác thải từ bên ngoài sông Bình Di chảy vào, nước lũ rút nước thải từ cống Sa Tô thải ra, mương Búng Nhỏ xả thải vào. Theo điều tra và khảo sát từ năm 2018 đến năm 2022, chất lượng nước của hồ BBT đang bị suy giảm được đặc trưng bởi các thông số tổng chất rắn lơ lửng (TSS), oxy hòa tan (DO), nhu cầu oxy sinh hóa (BOD5), tổng coliform chỉ đạt cột B1 so với QCVN 08:2015/BTNMT và mức C của QCVN 08:2023/BTNMT, chất lượng nước không đạt cho nhu cầu sử dụng sinh hoạt.

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