依据主成分分析法和化学热力学的基本理论,编写了基于FORTRAN语言的程序,优化了模型阈值的确定方法,根据计算目的不同,分别选取不同的目标离子作为控制模型循环的阈值。结合某工程实例,与传统算法进行了比较,证明该模型的算法在坝址区的计算具有更好的稳定性和计算精度。 According to the principle of principal component analysis and chemical thermodynamics, a program based on FORTRAN language was compiled and the method of determining the model threshold was optimized. Different target ions were chosen as the threshold of the control model cycle according to different purposes. Combined with a project example, compared with the traditional algorithm, it proves that the algorithm of the model has better stability and accuracy in dam site calculation.