Simulation of Water Quality of Neijiang River Based on RMA4 Model

Using the RMA4 water quality model to simulate the water quality of Neijiang river in Zhenjiang, the result showed that: in the dry season the ranges of the concentration of various pollutants simulation of Neijiang were BOD5 3.2-5.2mg/L, COD(subscript Mn) 4.7-6.8mg/L. NH3-N 0.46-1.8mg/L, TP 0.23-0.48mg/L and in the rainy period, the ranges of the concentration of various pollutants simulation of Neijiang were BOD5 0.69-0.73mg/L, COD(subscript Mn) 1.9-2.3mg/L, NH3-N 0.25-0.38mg/L. TP 0.14-0.17mg/L. These simulated values were closed to the monitoring values of pollution concentrations of Neijiang, which indicated that RMA4 was certain practical in the river water quality simulation, and simulation results have a certain degree of reliability, and it provides a scientific planning and management method for the river pollution control.