Ảnh hưởng theo mùa và thủy triều lên chất lượng nước mặt sông Hậu thuộc tỉnh Hậu Giang

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Tác giả: Hồng Thảo Ly Nguyễn, Thanh Giao Nguyễn, Thị Hằng Phùng

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Đại học Hạ Long, 2022

Mô tả vật lý: tr.79

Bộ sưu tập: Metadata

ID: 337268

Thêm vào giỏ Liên kết toàn văn

Nghiên cứu nhằm đánh giá ảnh hưởng của mùa và thủy triều đến chất lượng nước mặt sông Hậu tỉnh Hậu Giang, Việt Nam. Dữ liệu chất lượng nước được thu thập tại sáu địa điểm khi thủy triều xuống và thủy triều lên. Các thông số giám sát bao gồm pH, oxy hòa tan (DO), nhu cầu oxy sinh hóa (BOD), nhu cầu oxy hóa học (COD), tổng chất rắn lơ lửng (TSS), amoni (NH4+-N), nitrat (NO3--N), orthophosphat (PO43--P), tổng photpho (TP), tổng nitơ (TN), sắt (Fe) và coliform. Phân tích phương sai một chiều (One-way ANOVA), phân tích cụm (CA) và phân tích phân biệt số (DA) đã được áp dụng để xác định ảnh hưởng của thủy triều và các mùa lên chất lượng nước. Chất lượng nước mặt được so sánh với Quy chuẩn kỹ thuật quốc gia cho thấy, nước mặt tại khu vực nghiên cứu bị ô nhiễm hữu cơ và có khả năng phú dưỡng cao. Các thông số BOD, COD, TN, TP, Fe và coliform khi triều thấp có xu hướng cao hơn khi triều cường. Năm thông số bao gồm TSS, TP, TN, PO43--P và coliform có sự khác biệt đáng kể giữa mùa mưa và mùa khô bằng phân tích DA. Phân tích theo cụm phân loại chất lượng nước thành 3 cụm chủ yếu theo các thông số BOD, COD, TSS, PO43--P và Fe. Nghiên cứu cung cấp thông tin quan trọng về chất lượng nước sông Hậu ở tỉnh Hậu Giang cho việc sử dụng và giám sát nguồn nước.The study aimed to evaluate the influence of seasons and tides on the surface water quality of the Hau river in Hau Giang province, Vietnam. Water quality data were collected at six locations at low tide and high tide. The monitoring parameters included pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), ammonium (NH4+-N), nitrate (NO3--N), orthophosphate (PO43--P), total phosphorus (TP), total nitrogen (TN), iron (Fe), and coliform. One-way analysis of variance (One-way ANOVA), cluster analysis (CA), and discriminant analysis (DA) were applied to determine the influence of tides and seasons on water quality. Surface water quality is compared with the national technical regulation on surface water quality. It showed that surface water in the study area had organic pollution and high eutrophication potential. The parameters of BOD, COD, TN, TP, Fe, PO43--P and coliform in low tide tended to be higher than those in high tide. Five parameters including TSS, TP, TN, PO43--P and coliform had a significant difference between the wet season and the dry season by DA analysis. Cluster analysis classified water quality into three clusters mainly by parameters BOD, COD, TSS, PO43--P and Fe. The study provides important information on the water quality of the Hau river in Hau Giang province for water use and monitoring.

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