水力发电2024，Vol.50Issue(12)：33-38,6.
基于复合衰退模型比率突变的基流分段衰退的临界流量确定方法
A Method for Determining Critical Discharge of Baseflow Subsection Recession Based on the Ratio Mutation of Compound Recession Model
摘要
Abstract
In view of the difficulty in determining the critical discharge of the flow curve transforming from the power-law to exponential relationship before and after the baseflow recession in Karst basin,a binary compound recession model is proposed to explore the relationship between the binary mixing ratio and the initial recession discharge by setting the different discharges from large to small during the master recession process as the initial recession discharge,and the method for determining the critical discharge when the flow transforms from the power-law to exponential relation is obtained.Taking the recession processes of 20 subbasins in Yuanjiang River and Zishui River as example,this method is applied to determine the critical discharge,and the recession processes are simulated with the subsection recession model.The results show that the recession law changes significantly near a specific initial recession discharge,and the mixing ratio also shows a significant mutation near the discharge,which verifies the validity of the method for determining the critical discharge.The Nash efficiency coefficient and relative root-mean-square error of the subsection recession model based on the critical discharge are better than those of the composite model,which further proves the rationality of the determined critical discharge.关键词
基流衰退模型/复合衰退模型/临界流量/混合比率/幂律型规律/指数型规律/喀斯特流域Key words
baseflow recession model/compound recession model/critical discharge/mixing ratio/power law/exponential law/karst basin分类
建筑与水利引用本文复制引用
布庆月,张润润,周倩荟..基于复合衰退模型比率突变的基流分段衰退的临界流量确定方法[J].水力发电,2024,50(12):33-38,6.基金项目
国家自然科学基金资助项目(41701016) （41701016）
中央高校基本科研业务费专项资金资助(B220202035) （B220202035）
