Optimization of planting structure in pumping irrigation system based on water footprint and water-energy-grain nexus

被引：0
|
作者：
Cui S. [1 ]
Wu M. [1 ]
Wang X. [2 ]
Cao X. [1 ,3 ]
机构：
[1] College of Agricultural Science and Engineering, Hohai University, Nanjing
[2] Nanjing Hydraulic Research Institute, State Key Laboratory of Hydrology- Water Resources and Hydraulic Engineering, Nanjing
[3] Jiangsu Province Engineering Research Center for Agricultural Soil-Water Efficient Utilization, Carbon Sequestration and Emission Reduction, Nanjing
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2023年 / 54卷 / 08期
关键词：
crop water footprint; multi-objective optimization; pumping irrigation system; Topsis evaluation method; water- energy - grain nexus;
D O I：
10.13243/j.cnki.slxb.20230022
中图分类号：
学科分类号：
摘要：
Irrigation system is the key carrier of agricultural production and water use, and the coordination of water-energy-grain nexus has an important impact on regional sustainable development. Compared with traditional studies on efficient allocation of irrigation water, water footprint theory clarifies the total water consumption and utilization types of agricultural production water resources. In response to the problem of water-energy resources supply and demand incompatible allocation and the ecological impact incomprehensive consideration in pumping irrigation system, a multi-objective optimization evaluation model of planting structure in pumping irrigation district was constructed by combining the water footprint theory and water-energy-grain nexus with integrating the multi-dimensional systems of social, resources, ecology, and economy, taking into account the full phases of water resource allocation, agricultural production water and grain production transfer. The model was applied to Lianshui Irrigation District to adjust the planting structure of grain crops (rice, wheat, maize, and soybeans) , and then the Topsis method was adopted to compare and evaluate the relative closeness between the status quo and optimal configurations. The optimization results show that under the basic premise of ensuring food security, the sowing area of maize should be increased, and that of soybeans should be reduced. Compared with the status quo, the annual u-nilateral water economic net benefit of grain increased by 4.0% after the optimization, and crop carbon footprint showed a downward trend when crop planting baseline was changed with decreasing by 79.5 kg in 2018 after the optimization. The relative closeness of the optimization scheme was greater than the status quo, which plays a reliable supporting role in promoting efficient resources utilization and agricultural sustainability in pumping irrigation system. © 2023 China Water Power Press. All rights reserved.
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页码：967 / 977
页数：10
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