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采用较为简单的数学方法，建立了一维瞬时投源河流水质方程解析解计算结果的统计参数与原始数据的统计参数间的近似关系，推导出了描述该解析解计算问题性态的条件数。通过讨论，指明了计算问题属于“病态”和“良态”的条件。从而为正确使用该解析解解决实际水质计算问题提出了相应的建议。
The simple mathematical method is used to establish the approximate relationship between the statistical parameters of the analytic solution of one-dimensional instantaneous source water quality equation and the statistical parameters of the original data, and the condition number describing the behavior of the analytical solution is derived. Through the discussion, it points out that the computational problems are “sick” and “good” conditions. Thus put forward the corresponding suggestion for the correct use of this analytical solution to solve the actual water quality calculation problem.