基于不同退水模型的鄱阳湖上游山区流域基流衰退时间评估  

Assessing Baseflow Recession Time according to Linear and Nonlinear Storage-discharge Relationships across Catchments in Poyang Lake Basin

作　　者：张润润[1] 布庆月 章阳 宁玮 ZHANG Runrun;BU Qingyue;ZHANG Yang;NING Wei(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Fuhe River Hydrology and Water Resources Monitoring Center,Fuzhou 344000,China;Jiangxi Province Key Laboratory of Poyang Lake Hydrology and Ecology Monitoring and Research,Nanchang 330002,China)

机构地区：[1]河海大学水文水资源学院,江苏南京210098 [2]抚河水文水资源监测中心,江西抚州344000 [3]鄱阳湖水文生态监测研究重点实验室,江西南昌330002

出　　处：《水文》2025年第2期100-106,共7页Journal of China Hydrology

基　　金：国家自然科学基金项目(41701016);中央高校基本科研业务费专项资金资助项目(B220202035)。

摘　　要：选取鄱阳湖上游22个流域,依据2007—2018年日观测资料,分别基于线性和非线性蓄泄模型估算各流域基流衰退时间,使用统计检验和相关分析,对比两种模型估计结果,揭示基流衰退时间的空间差异,解析地形、土壤植被和水文气候等因子对衰退时间的影响。结果表明:(1)基于线性模型估计的衰退时间显著低于非线性模型,线性、非线性模型估计的衰退时间均值分别为50.4 d和67.7 d。(2)基于两种不同模型所估计的基流衰退时间反映了相似的空间差异规律,且其中15个流域的衰退时间普遍比7大入湖流域衰退时间长。(3)海拔变异系数和平均年日流量变异系数与流域衰退时间呈显著的负相关,基流指数与衰退时间呈显著的正相关,即地形与水文要素对该区域基流衰退时间影响最为显著。研究成果有助于增进对鄱阳湖流域蓄-泄关系及湖泊蓄量动态机制的科学解析。Baseflow recession time of twenty-two catchments across the Poyang Lake Basin were estimated through recession analysis based on the daily streamflow observations from 2007 to 2018.Statistical test and correlation analysis were conducted to compare the estimations derived from the two models,revealing the spatial diversity of baseflow recession time.The potential controlling catchment characteristics were further analyzed.The results show:(1)The recession time estimated by the linear model is significantly lower than that of the nonlinear model,and the mean regression time estimated by the linear and nonlinear models is 50.4 and 67.7 days,respectively.(2)The estimated baseflow recession time based on the two different models reflects the similar spatial difference law,and the recession time of the 15 first-level catchments is generally longer than that of the 7 higher level catchments.(3)The coefficient of altitude variation and the average annual daily streamflow variation are negatively correlated with the catchment baseflow recession time,and the baseflow index is positively correlated with the catchment baseflow recession time,that is,topography and hydrological factors are the main controlling function on the catchment baseflow recession time in this area.The research results are helpful to improve the scientific analysis of the storage-discharge relationship and the dynamic mechanism in Poyang Lake Basin.

关 键 词：退水分析 蓄泄关系 线性模型 非线性模型 鄱阳湖流域 

分 类 号：P33[天文地球—水文科学]