Thực trạng chất lượng nước trong hệ thống thủy lợi Dầu Tiếng và đề xuất biện pháp giảm thiểu ô nhiễm

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Tác giả: Thị Xuyến Hà, Công Toại Nguyễn, Thị Thu Ngân Phạm, Vũ Phương Trang Phạm, Mạnh Hùng Phan

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ Thủy lợi, 2023

Mô tả vật lý: tr.79

Bộ sưu tập: Báo, Tạp chí

ID: 380430

Thêm vào giỏ Liên kết toàn văn

Nghiên cứu sử dụng hai phương pháp là (i) thống kê để đánh giá thông qua các chỉ tiêu chất lượng nước riêng lẻ và được so sánh với QCVN 08-MT:2015/BTNMT (cột A1, B1) và (ii) chỉ số chất lượng nước WQI so sánh bảng thang màu tại Quyết định 1460/QĐ-TCMT ngày 12/11/2019. Phạm vi nghiên cứu chất lượng nước (CLN) mặt trong hệ thống thủy lợi (HTTL) Dầu Tiếng tại 24 vị trí quan trắc thuộc phân bố đều trong hệ thống (công trình đầu mối, kênh tưới, kênh tiêu, khu đẩy mặn) với 07 đợt thu mẫu vào mùa khô tới đầu mùa mưa cho 12 chỉ tiêu quan trắc (Độ mặn, pH, DO, TSS, BOD5, COD, PO43-, NH4+, NO2-, NO3-, FeTS và Coliform). Kết quả nghiên cứu đã đưa ra được thực trạng, diễn biến CLN trong HTTL có sự biến động rõ theo không gian và thời gian như: khu vực đầu mối, kênh chính CLN tốt ngoại trừ một vài vị trí vào một số thời điểm trong năm
khu vực hạ lưu (kênh nhánh, kênh tiêu, khu đẩy mặn) CLN xấu hơn, có dấu hiệu bị ô nhiễm dinh dưỡng, hữu cơ thông qua một số chỉ tiêu amoni, nitrit, BOD5, coliform. Từ đó đã đưa ra được các biện pháp giảm thiểu ô nhiễm nguồn nước góp phần cho phát triển nông nghiệp, cấp nước sinh hoạt nhằm bảo vệ bền vững, ổn định tài nguyên nước mặt trong HTTLThe study used two methods: (i) statistical assessment through individual water quality index and compared with QCVN 08-MT:2015/BTNMT (columns A1, B1) and (ii) WQI water quality index compares with the color scale at Decision 1460/QD-TCMT dated 12/11/2019. The scope of the study of surface water quality in the Dau Tieng irrigation system at 24 observation locations is evenly distributed in the system (key works, irrigation canals, drainage channels, saltwater suppression areas) with 07 sampling periods in dry season to early rainy season for 12 monitoring indicators (Salinity, pH, DO, TSS, BOD5, COD, PO43-, NH4+, NO2-, NO3-, FeTS and Coliform). Research results have shown the situation, the evolution of water quality in the irrigation system has obvious fluctuations in space and time such as: upstream areas (lakes, behind culverts and main canals) are generally of good quality except for a few locations at some times of the year
downstream areas (branch canals, drainage canals, salt-dispersing areas) water quality is worse, signs of nutrient and organic pollution through some indicators of ammonium, nitrite, BOD5, coliform. The results of water quality assessment to propose measures to reduce water pollution, stably and sustainably protect surface water resources in the region.

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