应用数学统计法的原理,进行水库的多年调节计算,比按年历法进行调节计算有着许多优点。首先,数学统计法在理论上比年历法更为合理。它没有像年历法那样认为历史水文重演的假定,而这假定很可能把某些偶然的组合现像,认做是一般的规律。因此用数学统计法常能得到更合理的计算结果。在今天我们还只能在不多的几条河上,获得数十年的实测径流资料。而一般的河流上只能有十几年或者更短的水文资料。但既使我们有了数十年的水文资料,对于一 The principle of mathematical statistics, the reservoir for many years to adjust the calculation, compared with the calendar adjustment method has many advantages. First of all, mathematical statistics are more reasonable in theory than the almanac. It does not have the assumption that historical hydrography reenacts, as the calendar year does, and it is assumed that it is likely to recognize certain occasional combinations as a general rule. Therefore, mathematical statistics can often get more reasonable results. Today, we can only get measured runoff data for decades on a few rivers. The general river can only have more than ten years or shorter hydrological data. But even if we have decades of hydrological data, for one