基于正交试验法的河岸带水热耦合模型敏感参数识别

为了研究河岸带水热耦合模型参数对温度及侧向潜流交换速率有限元计算结果的影响，基于正交试验法，对影响河岸带温度T和侧向潜流交换速率|v_x|的水热耦合模型进行敏感参数识别。结果表明：孔隙率n对河岸带水热耦合模型温度输出结果的影响最大；对于侧向潜流交换速率，水力传导率k_s的影响最大，而其他参数的影响均较小。因此，在进行河岸带水热耦合模型参数反演或校正时，应将模型中的孔隙率和水力传导率作为重点参数，而敏感程度低的参数可通过工程类比的方法进行确定，这样既可以保证计算精度，又可以提高计算效率。

Identification of sensitive parameters for hydrothermal coupling model of riparian zone based on orthogonal test method

To investigate the influence of the parameters in the riparian zone hydrothermal coupling model on the finite element calculation results of the temperature and lateral hyporheic exchange rate, the sensitive parameters of this model were identified using the orthogonal test method. The results show that the porosity n has the greatest influence on the temperature output results of the hydrothermal coupling model of riparian zone. For the lateral hyporheic exchange rate, the influence of hydraulic conductivity k_s is the largest, whereas that of the other parameters are relatively small. Therefore, in the inversion or calibration of the parameters in the hydrothermal coupling model of riparian zone, the porosity and hydraulic conductivity are recommended to be selected as the key parameters, while the parameters with low sensitivity can be determined by engineering analogy or other methods, so as to ensure the calculation accuracy and improve the calculation efficiency.