Figure 2 Water quality test results of 7 sections from January to December (a. Dissolved oxygen; b. Chemical oxygen demand; c. Ammonia nitrogen; d. Total phosphorus; e. Permanganate index)
Figure 2 Results of water quality tests on 7 sections from January to December (a. dissolved oxygen; b. chemical oxygen demand; c. ammonia nitrogen; d. total phosphorus; e. permanganate index)