一维河网模型在平原感潮河网地区的应用

Application of 1D River Network Model to Plain Tidal River Network Area

针对感潮河网流量、流速等实时变化的水文特征,基于一维河网水动力、水质模式,以礼乐河片区河网为例建立了一维河网模型,并以某企业排污为例,模拟废水排放对该河网水环境的影响。预测结果表明,正常排放下涨潮时CODcr、总氰化物的增值浓度范围分别为0.4~1.0mg/L、0.0009~0.0023 mg/L,退潮时分别为0.7~1.2 mg/L、0.0019~0.0036 mg/L。相同断面涨潮时污染物浓度贡献值小于退潮时污染物浓度贡献值,符合该感潮河网涨潮时流量大、污染物浓度低,落潮时流量变小、污染物浓度较高的变化规律。

Base on 1D river network hydrodynamic and water quality model, took lile river network for example, the Lile river 1D network model was built aim at the tidal river network＇s flux, speed were changing all the time, and took a factory for example, simulated the influence on Lile river network environment under the water pollution discharge. The result shows that under normal discharge, the contribution of CODer and Cyanide were0.4-1.0 mg/L, 0.0009-0.0023 mg/L respectively at high tide, and were 0.7-1.2 mg/L, 0.0019-0.0036 mg/L respectively at ebb tide. On the same section, the pollution contribution at high tide was lower than that at ebb tide, which was in accordance with the rules of when the river was at high tide, the flux was bigger and the contribution was lower than that at ebb tide.