Phân vùng chất lượng nước nuôi trồng thủy sản ở đầm cầu hai, tỉnh thừa thiên huế

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Tác giả: Như Bình Mạc, Thành Luân Nguyễn, Văn Đàn Trương, Ngọc Út Vũ

Ngôn ngữ: vie

Ký hiệu phân loại: 639 Hunting, fishing, conservation, related technologies

Thông tin xuất bản: Tạp chí khoa học đại học cần thơ, 2018

Mô tả vật lý: 120-128

Bộ sưu tập: Metadata

ID: 489137

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Chủ đề

Phân vùng chất lượng nước nuôi trồng thủy sản ở đầm Cầu Hai được thực hiện bằng cách so sánh với các bộ tiêu chuẩn (QCVN02-19(:)2014/BNNPTNT, QCVN08-MT(:)2015/BTNMT,QCVN38(:)2011/BTNMT dưới sự hỗ trợ của công nghệ GIS. Các yếu tố nhiệt độ, DO, nitrate thích hợp cho hoạt động nuôi trồng thủy sản. Giá trị pH phù hợp cho hoạt động nuôi trồng thủy sản và mùa khô là 100% diện tích và mùa mưa là 79,4% diện tích. Độ mặn hầu hết phù hợp để lấy nước nuôi tôm. Độ kiềm không phù hợp cho nuôi trồng thủy sản ở mùa mưa và mùa khô lần lượt là 88,04% và 28,92%. Hàm lượng BOD5, vượt quá tiêu chuẩn cho phép. Hàm lượng phosphate không phù hợp cho hoạt động nuôi trồng thủy sản 91,13% diện tích vào mùa mưa và 53,57% vào mùa khô. Hàm lượng NH3 vượt giới hạn cho phép 41,68% diện tích (mùa mưa) và 36,65% diện tích (mùa khô). Tổng coliform cao hơn giới hạn cho phép với 63,33% diện tích (mùa mưa) và 44,19% diện tích (mùa khô).Zoning of aquaculture water quality in Cau Hai lagoon was conducted by comparing with the national standards (QCVN02-19(:)2014/BNNPTNT, QCVN08-MT(:)2015/BTNMT, and QCVN38(:)2011/BTNMT) through the help of GIS. Temperature, dissolved oxygen (DO), nitrate parameters were suitable to aquaculture activities. One hundred percent of the area had pH values in suitable range for aquaculture in the dry season, whereas only 79.4% was in the rainy season. Salinities were most in suitable range for shrimp culture. The alkalinity was unsuitable for aquaculture in rainy season and dry season was respectively 88.04% and 28.92%. BOD5 levels exceeded the QCVN08-MT(:)2015/BTNMT standard. Phosphate contents were not suitable for aquaculture with 91.13% and 53.57% of the areas the rainy season and dry season, respectively. Un-ionized ammonia concentrations exceeded the standard, with 41.68% and 36.55% of the areas in rainy season and dry season, respectively. The concentrations of total coliform were higher than the standard with 63.33% of the areas in rainy season and 44.19% in the dry season.

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