QUAL2E模型在长江重庆段水质模拟中的应用研究

QUAL2E模型是美国国家环境保护局(USEPA)推出的一个河流综合水质模型。三峡成库后,由于河道的水文特性将发生重大变化,长江重庆主城区段水环境也将发生变化。但成库后长江重庆主城区段水文特征与目前平水期相当。因此,以长江重庆主城区段平水期水质为原型,应用QUAL2E模型对成库后的水质进行了模拟和预测。选用水温、溶解氧、叶绿素a作为模拟预测指标,并对模拟结果进行了验证,结果表明预测值与实测值的相关性较好。为QUAL2E模型在长江的多参数水质模拟上进行了探索,可供参考。

Application of QUAL2E Model to Chongqing Urban Section of the Yangtze River

QUAL2E model was developed by USEPA as a comprehensive stream water quality model. Water environment of Chongqing urban section in the Yangtze River would vary since the Three Gorges Reservoir changes the hydrologic characteristics of the Yangtze River. The hydrologic characteristics of Chongqing Section are similar to the current in mean-flow period. Based on water quality of Chongqing Section in mean-flow period, QUAL2E model was used to simulate and predict water quality of the reservoir, with water temperature, DO and Chla as indexes. The simulation results were verified and showed that the predicted values agree well with the measured data, which can provide reference to multi-parameter simulation of water quality of the Yangtze River.