
Stochastic Simulation of Monthly Runoff Based on CEEMD-TD Model
Qian-li WANG, Xi-xia MA, Lu ZHAO, Jing-wen ZHANG, Xu CHENG
Stochastic Simulation of Monthly Runoff Based on CEEMD-TD Model
Targeted at the limitation of the typical solution set (TD) model, which is only applicable to stationary random series, a new monthly runoff stochastic model, this paper proposes the complementary set empirical mode decomposition (CEEMD-TD) model. Taking three typical hydrological stations in the Yellow River Basin as an example, a monthly runoff stochastic model of the CEEMD-TD model is established, and the simulation effect of the stochastic model is evaluated by examining the main statistical parameters of the section. The results show that the absolute value of the relative error of the statistical parameters of the CEEMD-TD model simulation sequence and the measured sequence in each typical hydrological station is small, indicating that the CEEMD-TD model can maintain the actual measurement in the simulation sequence of each typical hydrological station. The main statistical characteristics of the sequence provide an effective simulation method for the random simulation of monthly runoff.
monthly runoff sequence / stochastic model / TD model / CEEMD-TD model {{custom_keyword}} /
Tab.1 Typical hydrographic station information table表1 典型水文站信息表 |
流域 | 河名 | 水文站 | 东经 | 北纬 | 集水面积/km² | 实测径流序列年份 |
---|---|---|---|---|---|---|
黄河流域 | 伊洛河 | 黑石关 | 112°56' | 34°43' | 18 563 | 1952-2014 |
黄河 | 花园口 | 113°39' | 34°55' | 730 036 | 1949-2014 | |
洛河 | 白马寺 | 112°35' | 34°43' | 11 891 | 1955-2014 |
Tab.2 Trend test results of each station表2 各站趋势检验结果 |
水文站 | Mann-Kendall趋势检验 | Spearman秩相关检验 | |||||
---|---|---|---|---|---|---|---|
Z统计量 | Z 1- α /2 | β | 显著性趋势 | T统计量 | t 1- α /2, n -2 | 显著性 | |
黑石关 | -4.37 | 1.96 | -13.71 | 显著减小 | 4.85 | 2.00 | 显著 |
花园口 | -5.80 | 1.96 | -170.96 | 显著减小 | 7.51 | 2.00 | 显著 |
白马寺 | -3.39 | 1.96 | -6.61 | 显著减小 | 3.71 | 2.00 | 显著 |
Tab.3 Periodic statistics of annual runoff sequence of each station表3 各站年径流序列周期项统计量 |
水文站 | j | aj | bj (×103) | Aj | Tj | Fj | ωj |
---|---|---|---|---|---|---|---|
黑石关 | 7 | -0.24×103 | -0.12 | 0.27×103 | 9.00 | 4.23 | 0.70 |
花园口 | 3 | -0.30×103 | -1.95 | 1.98×103 | 22.00 | 3.97 | 0.29 |
白马寺 | 6 | 0.85×103 | 0.05 | 0.18×103 | 10.00 | 4.10 | 0.63 |
9 | -0.15×103 | 0.10 | 0.18×103 | 6.67 | 4.14 | 0.94 |
Tab.4 AR model parameters of IMF1~IMF5 sequence表4 IMF1~IMF5序列AR模型参数 |
水文站 | 序列 | μ/m3 | σ/m3 | φ 1 | φ 2 | φ 3 | φ 4 | φ 5 | 模型 |
---|---|---|---|---|---|---|---|---|---|
黑石关 | IMF1 | -13.34 | 363.33 | -0.30 | AR(1) | ||||
IMF2 | -1.08 | 264.70 | 0.53 | -2.10 | 1.40 | AR(3) | |||
IMF3 | 0.78 | 134.55 | 0.79 | -0.71 | -0.52 | 0.23 | 0.25 | AR(5) | |
IMF4 | 6.34 | 122.31 | 0.96 | AR(1) | |||||
IMF5 | -5.37 | 54.88 | 0.97 | AR(1) | |||||
花园口 | IMF1 | -14.07 | 2971.55 | -0.31 | -0.39 | AR(2) | |||
IMF2 | -39.00 | 1575.83 | 0.66 | AR(1) | |||||
IMF3 | -4.95 | 1224.52 | 0.85 | AR(1) | |||||
IMF4 | 2.55 | 439.40 | 0.91 | AR(1) | |||||
IMF5 | -116.16 | 480.19 | 0.97 | AR(1) | |||||
白马寺 | IMF1 | -7.60 | 248.47 | -0.19 | -0.38 | AR(2) | |||
IMF2 | 24.00 | 204.29 | 0.69 | AR(1) | |||||
IMF3 | -12.25 | 130.38 | 0.82 | AR(1) | |||||
IMF4 | 11.98 | 129.45 | 0.96 | AR(1) | |||||
IMF5 | -2.07 | 24.03 | 0.97 | AR(1) |
Tab.5 Comparison of statistical characteristics of annual runoff measured and simulated series at each station表5 各站年径流实测、模拟序列统计特性比较 |
水文站 | 黑石关 | 花园口 | 白马寺 | |||||
---|---|---|---|---|---|---|---|---|
径流序列 | 实测 | CEEMD-AR | 实测 | AR | CEEMD-AR | 实测 | AR | CEEMD-AR |
| 987 | 989 | 616 | 599 | 606 | 14×103 | 13×103 | 13.91×103 |
ARE | - | 0.17 | - | 2.64 | 1.63 | - | 2.46 | 2.83 |
| 625 | 639 | 406 | 385 | 400 | 5.6×103 | 5.5×103 | 5.70×103 |
ARE | - | 2.27 | - | 5.13 | 1.59 | - | 1.91 | 1.21 |
Cv | 0.63 | 0.65 | 0.67 | 0.63 | 0.66 | 0.40 | 0.42 | 0.41 |
ARE | - | 3.17 | - | 5.97 | 1.49 | - | 5.00 | 2.50 |
Cs | 1.75 | 1.77 | 2.10 | 1.93 | 2.04 | 1.05 | 1.07 | 1.07 |
ARE | - | 1.14 | - | 8.10 | 2.86 | - | 1.90 | 1.90 |
γ1 | 0.42 | 0.44 | 0.39 | 0.37 | 0.40 | 0.52 | 0.57 | 0.50 |
ARE | - | 4.38 | - | 6.08 | 1.71 | - | 8.87 | 3.73 |
γ2 | 0.21 | 0.22 | 0.11 | 0.10 | 0.12 | 0.37 | 0.42 | 0.39 |
ARE | - | 4.55 | - | 8.88 | 4.40 | - | 6.77 | 5.55 |
Fig.7 Comparison diagram of monthly runoff measured at Heishiguan Station and statistical characteristics of each simulated series图7 黑石关站月径流实测及各模拟序列统计特性对比图 |
Fig.8 Comparison diagram of monthly runoff measured at huayuankou Station and statistical characteristics of each simulated series图8 花园口站月径流实测及各模拟序列统计特性对比图 |
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