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在用水位流量关系法推流时，提出了用积分法求时段平均流量，用抛物线代替直线。计算结果表明，该方法的计算误差较小，且没有系统性。
When using the relationship between flow and discharge, the method of integral method was proposed to find the average flow of time and replace the straight line with a parabola. The calculation results show that the calculation error of this method is small and not systematic.