为了研究电厂温排水对其受纳水体环境温升影响，在已有工作的基础上，建立了基于河势贴体计算网格形式的平面二维水动力及热扩散数学模型。热扩散模型中各主要参数敏感性分析数值试验结果表明，从定性分析上看，所建立的数学模型模拟结果符合一般温升影响客观规律。应用实例也表明，数模计算与物模试验成果温升影响分布规律基本一致，统计1℃温升影响包络线面积、数模与物模计算误差均在8％以内。这说明所建立的数学模型在一定程度上可以反映河道内温排水所带来的温升影响，且具有一定的精度。

To analyze temperature rise influence by power plant thermal effluent， a 2-D hydrodynamic and thermal diffusional mathematical model was established based on previous work and with river regime-fitted computational meshes. Sensitivity analyses of parameters and coefficients in the thermal diffusion equation qualitatively show that this mathematical model can simulate the temperature rise influence. Application results also show that, the model has basically the same temperature-rise envelope in comparison with the physical model, and the simulation error of 1℃ envelope area between two models is within 8%.