摘要
基于小理河流域1959~2010年实测洪水数据,采用斜率单变点法确定C点,在此基础上利用相邻时段流量相关法、线性水库模型、指数模型及非线性模型对该流域次洪退水段进行分析模拟。结果表明,基于斜率单变点法推求次洪地面径流终止点C基础上所得小理河流域次洪地下径流占比具有增大趋势;由相邻时段流量相关法得到变化期(1978~2010年)次洪地下径流平均退水参数较基准期(1959~1977年)增大131.75%,次洪地下径流退水向着更加缓慢的方向发展;线性水库模型、指数模型及非线性模型对次洪地下径流退水模拟的精度,经确定性系数和损失函数指标评定,效果均理想,小理河流域退水规律适宜用非线性模型描述,其次是线性水库模型。
Based on the measured flood data of Xiaolihe River Basin from 1959 to 2010,the point C was determined by the slope single change-point.On this basis,flow correlation method of adjacent period,linear reservoir model,exponential model and nonlinear model were used to simulate the recession of the flood event of Xiaolihe River basin.The results show that the ratio of groundwater runoff to the total runoff of the flood events has an increasing trend after determining the surface runoff termination point C in the flood hydrograph by the method of slope single change-point.According to the flow correlation method of adjacent periods,the average value of groundwater recession parameters during the changing period(1978-2010)is 131.75%higher than that during the base period(1959-1977),and therefore the velocity of groundwater flow concentration is decreasing distinctly.The linear reservoir model,exponential model and nonlinear model have a high accuracy for simulating the groundwater flow recession evaluated by the deterministic coefficient and loss function.So,it is more suitable for the nonlinear model than the linear reservoir model to represent the groundwater flow recession in the Xiaolihe River Basin.
作者
张清杰
黄领梅
ZHANG Qing-jie;HUANG Ling-mei(State Key Laboratory of Ecological Water Conservancy in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China)
出处
《水电能源科学》
北大核心
2022年第1期21-24,共4页
Water Resources and Power
基金
国家自然科学基金项目(51679184)。
关键词
小理河流域
斜率单变点法
次洪退水段
退水曲线
Xiaolihe River Basin
gradient single change-point method
recession of flood event
recession curve
