KHẢO SÁT HIỆN TRẠNG VÀ ĐÁNH GIÁ CHẤT LƯỢNG MÔI TRƯỜNG NƯỚC MẶT PHỤC VỤ NUÔI TÔM SINH THÁI TẠI CÀ MAU

Abstract

The project used the methods of collecting, studying documents, conducting surveys, interviewing about the current situation and assessed the quality of surface water for eco-shrimp living in Ca Mau. The results have recorded that the total area of eco-shrimp farming in Ca Mau was about 30,713 ha, concentrated in the districts of Nam Can, Ngoc Hien, Phu Tan, Dam Doi, of which the eco-shrimp farming area certified by international organizations was about 19,000 hectares with nearly 4,200 households certified Naturland.
Besides, the project has surveyed and interviewed 53 eco-shrimp farming households in centralized shrimp farming districts such as Nam Can, Dam Doi, Ngoc Hien to get more information about the current status of the pond, the amount of feed, chemicals used, water supply and waste water during the culture period. The process of water quality assessment for shrimp farming is based on water analysis samples in shrimp ponds. Based on the monitoring results, it is found that most of the parameters are within the permitted values of QCVN 02-19: 2014 / BNNPTNT - National technical regulation on brackish water shrimp farms, QCVN 08: 2015 / BTNMT- National technical regulation on surface water quality, some samples had parameters COD, BOD5, TSS, Colifrom in excess of the permitted standards. Results from surveys, interviews and data analysis show that the water environment in shrimp farming has not been seriously polluted, the parameters have exceeded the standard partly due to human activities affecting surface water sources. To protect the environment and develop organic shrimp farming models, it is necessary to effectively manage the water environment for shrimp farming.
Keywords: Ca Mau, water quality assessment, shrimp farming, ecology, mangroves.