本文系根据《水利水电工程水文计算规范》附录五编写而成。该附录正在审批过程中。本刊发表此文的目的是供有关方面工作中参考;同时欢迎广大读者读后提出宝贵的意见和建议,以便使《附录五》更加充实和完善。——编者 This article is based on “Hydrology and Hydropower Engineering Hydrological Computing Code” Appendix V prepared. This appendix is ​​in the process of approval. The publication of this article is intended for reference in the work of the parties concerned; at the same time, readers are welcome to come forward with valuable comments and suggestions in order to make “Appendix V” more substantial and complete. --editor