Bài viết này trình bày đặc điểm phân bố các muối dinh dưỡng, đây là một trong các nội dung nghiên cứu của dự án bảo vệ môi trường “Áp dụng các mô hình hiện đại nhằm đánh giá, phòng tránh và giảm thiểu thiệt hại các tác động môi trường của hiện tượng đóng/mở các cửa sông, đầm phá phục vụ chiến lược phát triển bền vững kinh tế xã hội, bảo vệ môi trường tại dải ven biển Nam Trung Bộ (Đà Nẵng - Bình Thuận)” | Vietnam Journal of Marine Science and Technology Vol. 19 No. 1 2019 57 66 DOI https 1859-3097 19 1 9632 https jmst Distribution of nutrients in the O Loan lagoon waters Phu Yen province 2012 2014 Le Thi Vinh Nguyen Hong Thu Pham Huu Tam Le Trong Dung Institute of Oceanography VAST Vietnam E-mail levinh62@ Received 12 April 2017 Accepted 26 December 2017 2019 Vietnam Academy of Science and Technology VAST Abstract The results of three surveys in the O Loan lagoon in the dry season April 2013 and the rainy season December 2012 and December 2014 showed that in the rainy season the average concentrations of nutrients in waters ammonium μgN l nitrite μgN l nitrate 55 μgN l and silicate 4021 μgSi l tended to be higher than those in the dry season ammonium μgN l nitrite μgN L nitrate 35 μgN l and silicate 1973 μgSi l while phosphate concentraiton did not differ between the two seasons with an average concentration of μgP l in rainy season and 60 μgP L in dry season. By space the concentrations of nutrients except nitrate in the lagoon especially in the southern part were usually higher than those in the canal connected to the sea. At O Loan lagoon waters only ammonium mainly in the southern part of the lagoon and nitrate mainly in the canal and southern part of the lagoon concentrations were higher than the criteria values in the rainy season December 2014 with pollution coefficient of about . However the water quality of O Loan lagoon regarding nutrients always still needs to be monitored because from 1992 to the surveyed time the concentrations of nutrients containing nitrogen and phosphate had the increasing trend in both seasons. Keywords Nutrients water O Loan lagoon Phu Yen. Citation Le Thi Vinh 2019. Distribution of nutrients in the O Loan lagoon waters Phu Yen province 2012 2014 . Vietnam Journal of Marine Science and Technology 19 1 57 66. 57 Tạp chí Khoa học và Công nghệ Biển Tập 19 Số
