A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural Network
Taking a certain coastal area of Jiangsu province as the research background, this study scientifically predicts the runoff on the medium and long-term time scale according to the changes of various climate factors such as atmospheric circulation, sea surface temperature, and solar activity in the f...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/20/3559 |
| _version_ | 1797572041818243072 |
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| author | Kun Yan Shang Gao Jinhua Wen Shuiping Yao |
| author_facet | Kun Yan Shang Gao Jinhua Wen Shuiping Yao |
| author_sort | Kun Yan |
| collection | DOAJ |
| description | Taking a certain coastal area of Jiangsu province as the research background, this study scientifically predicts the runoff on the medium and long-term time scale according to the changes of various climate factors such as atmospheric circulation, sea surface temperature, and solar activity in the first half of the year. A lag correlation is established between various related climate factors and the monthly runoff process in the research area for the previous 1–6 months. Selecting advantageous factors and constructing a significant factor set. Using the improved BP (Back-Propagation) artificial neural network model and combining it with the sensitivity analysis method, a specific number of 8-factor combinations are selected from the set of significant factors for medium and long-term runoff prediction. After that, the prediction results are compared with the forecasting effects of two multi-factor combination runoff simulation schemes formed by stepwise regression and Spearman rank correlation methods. The study concluded that the multi-factor combination simulation effect formed through sensitivity analysis was the best. The 20% standard forecast qualification rate of the three schemes is not significantly different. The Mean Absolute Relative Error of the multi-factor combination training and validation periods simulated through sensitivity analysis is the smallest among the three schemes, which are 36.61% and 38.01%, respectively. The Nash Efficiency Coefficient in the validation period is 0.45, which is far better than other schemes and has better generalization ability. The Standard Deviation of Relative Error in the training and validation periods is much smaller than other schemes, and the dispersion of relative errors is the smallest. |
| first_indexed | 2024-03-10T20:49:02Z |
| format | Article |
| id | doaj.art-9c032767ff56470280ddb76e3abc1cbf |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T20:49:02Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-9c032767ff56470280ddb76e3abc1cbf2023-11-19T18:29:23ZengMDPI AGWater2073-44412023-10-011520355910.3390/w15203559A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural NetworkKun Yan0Shang Gao1Jinhua Wen2Shuiping Yao3Zhejiang Institute of Hydraulics and Estuary (Zhejiang Institute of Marine Planning and Design), Hangzhou 310020, ChinaZhejiang Institute of Hydraulics and Estuary (Zhejiang Institute of Marine Planning and Design), Hangzhou 310020, ChinaZhejiang Institute of Hydraulics and Estuary (Zhejiang Institute of Marine Planning and Design), Hangzhou 310020, ChinaZhejiang Institute of Hydraulics and Estuary (Zhejiang Institute of Marine Planning and Design), Hangzhou 310020, ChinaTaking a certain coastal area of Jiangsu province as the research background, this study scientifically predicts the runoff on the medium and long-term time scale according to the changes of various climate factors such as atmospheric circulation, sea surface temperature, and solar activity in the first half of the year. A lag correlation is established between various related climate factors and the monthly runoff process in the research area for the previous 1–6 months. Selecting advantageous factors and constructing a significant factor set. Using the improved BP (Back-Propagation) artificial neural network model and combining it with the sensitivity analysis method, a specific number of 8-factor combinations are selected from the set of significant factors for medium and long-term runoff prediction. After that, the prediction results are compared with the forecasting effects of two multi-factor combination runoff simulation schemes formed by stepwise regression and Spearman rank correlation methods. The study concluded that the multi-factor combination simulation effect formed through sensitivity analysis was the best. The 20% standard forecast qualification rate of the three schemes is not significantly different. The Mean Absolute Relative Error of the multi-factor combination training and validation periods simulated through sensitivity analysis is the smallest among the three schemes, which are 36.61% and 38.01%, respectively. The Nash Efficiency Coefficient in the validation period is 0.45, which is far better than other schemes and has better generalization ability. The Standard Deviation of Relative Error in the training and validation periods is much smaller than other schemes, and the dispersion of relative errors is the smallest.https://www.mdpi.com/2073-4441/15/20/3559coastal areamedium to long-term runoff predictionclimate factorsimproved BP artificial neural networksensitivity |
| spellingShingle | Kun Yan Shang Gao Jinhua Wen Shuiping Yao A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural Network Water coastal area medium to long-term runoff prediction climate factors improved BP artificial neural network sensitivity |
| title | A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural Network |
| title_full | A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural Network |
| title_fullStr | A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural Network |
| title_full_unstemmed | A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural Network |
| title_short | A Multi-Factor Combination Model for Medium to Long-Term Runoff Prediction Based on Improved BP Neural Network |
| title_sort | multi factor combination model for medium to long term runoff prediction based on improved bp neural network |
| topic | coastal area medium to long-term runoff prediction climate factors improved BP artificial neural network sensitivity |
| url | https://www.mdpi.com/2073-4441/15/20/3559 |
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