Optimal Operation Model of Drainage Works for Minimizing Waterlogging Loss in Paddy Fields
1
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
2
College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China
3
Changjiang River Scientific Research Institute, Wuhan 430010, China
4
Jiangxi Irrigation Experiment Central Station, Nanchang 330201, China
*
Author to whom correspondence should be addressed.
Academic Editor: Per-Erik Mellander
Water 2021, 13(20), 2811; https://doi.org/10.3390/w13202811
Received: 10 July 2021
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Revised: 29 September 2021
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Accepted: 5 October 2021
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Published: 9 October 2021
(This article belongs to the Special Issue Excessive Water and Drainage Management in Agriculture: Disaster, Facilities Operation and Pollution Control)
The risk of flood or waterlogging in irrigation districts has increased due to global climate change and intensive human activities. A Model of Optimal Operation of Drainage Works (MOODW) for flat irrigation district was established by incorporating the hydrological model of waterlogging process and waterlogging loss estimation, which was solved by an optimization method of genetic algorithm. The model of waterlogging process was built based on a modified Tank model and hydrodynamic model for the ditch-river system. The waterlogging loss is calculated under the condition of inconstant inundated depth by linear interpolation. The adaptive genetic algorithm with the global optimization function was selected to solve the model. With an extreme rainfall events in Gaoyou irrigation district as cases, results showed that operation time and numbers of pumps increased; thus, operating costs were 1.4 times higher than before, but the yield loss of rice decreased by 35.4% observably. Finally, the total waterlogging loss was reduced by 33.8% compared with the traditional operation of waterlogging work. The most significant improvement was found in units with high waterlogging vulnerability. The MOODW can provide the waterlogging information visually and assist the district manager in making a reasonable decision.
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Keywords:
optimal operation; waterlogging; modeling; paddy field drainage
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MDPI and ACS Style
Liu, Z.; Xiong, Y.; Xu, J.; Yang, S.; Jiang, Z.; Liu, F. Optimal Operation Model of Drainage Works for Minimizing Waterlogging Loss in Paddy Fields. Water 2021, 13, 2811. https://doi.org/10.3390/w13202811
AMA Style
Liu Z, Xiong Y, Xu J, Yang S, Jiang Z, Liu F. Optimal Operation Model of Drainage Works for Minimizing Waterlogging Loss in Paddy Fields. Water. 2021; 13(20):2811. https://doi.org/10.3390/w13202811
Chicago/Turabian StyleLiu, Zhenyang, Yujiang Xiong, Juzeng Xu, Shihong Yang, Zewei Jiang, and Fangping Liu. 2021. "Optimal Operation Model of Drainage Works for Minimizing Waterlogging Loss in Paddy Fields" Water 13, no. 20: 2811. https://doi.org/10.3390/w13202811
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