【摘要】 基于水环境数学模型EFDC(environment fluid dynamics code),建立了重庆库区长江干流的水动力水质模型,通过2017年监测水文、水质资料对模型进行了率定和验证,模拟结果与监测资料吻合度较好,表明水动力水质模型计算结果较为合理可靠。根据该模型量化各个排污口对水质控制断面的响应系数,以地表水Ⅱ类水标准为规划目标,用线性规划法求解水环境容量。计算结果表明,重庆库区化学需氧量(COD)、氨氮(NH3-N)、总磷(TP)的水环境容量分别为77 664 t/a,11 038 t/a和922 t/a。重庆库区干流水动力水质模型的建立与水环境容量的计算,为三峡库区的水环境保护工作提供了一个重要的管理和分析平台,对于三峡库区的污染物总量控制具有重要的意义。更多还原

【Abstract】 Based on the water environment mathematical model EFDC(environmental fluid dynamics code), the hydrodynamic and water quality model of the Yangtze River in Chongqing section was established. The model was calibrated and verified by using the hydrology and water quality data monitored in 2017. The simulation results are in good agreement with the measured data, indicating that the model calculations are reasonable and reliable. According to the model, the response coefficient was quantified for each sewage outlet to the water quality control section, and the linear environment method was used to determine the capacity of water environment by taking Class II of the national standards for surface water quality as the planning target. The calculation results show that the water environmental capacity for chemical oxygen demand, ammonia nitrogen and total phosphorus in Chongqing section are77 664 t/a, 11 038 t/a and 922 t/a, respectively. The establishment of the hydrodynamic water quality model for the Yangtze River in Chongqing section and the simulated capacity of water environment provide an important platform for management and analysis of water environmental protection, and is of great significance for the total mass control of pollutants in the Three Gorges Reservoir area.更多还原