ĐÁNH GIÁ CHẤT LƯỢNG NƯỚC HỒ AN DƯƠNG, TỈNH HẢI DƯƠNG SỬ DỤNG CHỈ SỐ CHẤT LƯỢNG VÀ CÁC CHỈ SỐ Ô NHIỄM NƯỚC

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2020

Mô tả vật lý: tr.39-46

Bộ sưu tập: Báo, Tạp chí

ID: 303015

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Nghiên cứu này được thực hiện để đánh giá chất lượng nước hồ An Dương, tỉnh Hải Dương từ 2019 - 2020. 12 mẫu nước mặt đã được lấy trên hồ vào mùa mưa (9/2019) và mùa khô (2/2020) để phân tích các thông số chất lượng nước. Chỉ số chất lượng nước (WQI), chỉ số ô nhiễm tổng hợp (CPI) và chỉ số ô nhiễm hữu cơ (OPI) đã được sử dụng để đánh giá chất lượng nước hồ. Phân tích Pearson, T-test và Cluster được tính toán để đánh giá mối tương quan của nồng độ các chất ô nhiễm trong nước hồ, sự biến động chất lượng nước hồ theo không gian và thời gian. Kết quả nghiên cứu cho thấy: Chất lượng nước hồ trong mùa mưa còn tốt có thể dùng để cấp nước sinh hoạt. Tuy nhiên, trong mùa khô chất lượng nước bị ô nhiễm bởi các thông số TSS, PO43-, NH4+, COD và BOD5. Có sự khác biệt về chất lượng nước hồ theo không gian và thời gian. Trong đó, quá trình pha loãng chất ô nhiễm trong mùa mưa và gia tăng chất thải của chim, cò trong mùa khô là hai yếu tố dẫn tới chất lượng nước trong mùa mưa tốt hơn trong mùa khô. Theo không gian chất lượng nước hồ phân thành các điểm ít biến động và biến động. Sự phân chia này phụ thuộc vào phân bố nguồn thải xung quan hồ và vị trí các cống dẫn nước vào hồ.This study was carried out to assess water quality of An Duong lake in Hai Duong province in the period from 2019 to 2020. 12 surface water samples were taken on the lake in rainy season (9/2019) and dry season (2/2020) to analyze water quality parameters. Water quality index (WQI), comprehensive pollution index (CPI) and organic pollution index (OPI) were used to assess water quality of the lake. Pearson, T-test and Cluster analysis were calculated to evaluate the correlation among concentration of pollutants in the lake water and the fluctuation in water quality of the lake over time and space. The results showed that: water quality of the lake in rainy season is still good for domestic use. However, in dry season, water quality is polluted by the parameters of TSS, PO43-, NH4+, COD and BOD5. There is a difference in water quality of the lake over time and space. In which, the process of diluting concentration of pollutants in rainy season and increasing the waste of birds and storks in dry season are two factors that lead to water quality of the lake in the rainy season better than in the dry season. According to space, water quality of the lake is divided into points with little fluctuation and fluctuation. This division depends on the distribution of waste sources around the lake and the location of culverts that drain water into the lake.

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