谢尔曼单位线识别新方法  

New Method of Sherman Unit Hydrograph Identification

作　　者：程银才[1] 王军 李明华 CHENG Yin-cai WANG Jun LI Ming-hua(Water conservancy and Civil Engineering College, Shandong Agricultural University, Tai＇an 271018, Shandong Province, China Tai＇an Hydrology bureau in Shandong Province, Tai＇an 271000, Shangdong Province, China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018 [2]山东省泰安市水文局,山东泰安271000

出　　处：《中国农村水利水电》2016年第11期74-75,81,共3页China Rural Water and Hydropower

摘　　要：分析了传统的谢尔曼单位线推求方法易出现锯齿、多峰和负值的不合理现象的原因,提出了谢尔曼单位线识别的两步法:1采用约束的非线性最小二乘法识别单位线,以消除单位线出现负值的可能;2采用离散傅里叶级数对第一步的结果实施光滑,以消除单位线的锯齿和多峰现象,最后给出了一个计算示例。结果表明,新方法克服了传统方法识别单位线的不足,在工程实践上可以参考应用。This paper analyzes the reasons of the unreasonable phenomenon, such as zigzag, multi-peak and negative in the traditional method of Sherman unit identification, puts forward to two steps method of unit hydrograph identification ： the first step, use constrained nonlinear least squares identification unit hydrograph, in order to eliminate the unit hydrograph negative; the second step, use discrete Fourier series smooth the results of the first step to eliminate the zigzag and multi-peak phenomenon of unit line, In the end, give a example. Research shows that the new method overcomes the deficiency of the traditional method to identify the unit hydrograph, the application can reference in engineering practice.

关 键 词：谢尔曼单位线 识别 约束非线性最小二乘法 离散傅里叶级数 方法 

分 类 号：TV122[水利工程—水文学及水资源] TV213.9