| Cite this article: | 裴青宝.红壤丘陵地区多点源滴灌入渗运移分布特性及数值模拟[J].灌溉排水学报,0,():-. |
| Pei Qing Bao.红壤丘陵地区多点源滴灌入渗运移分布特性及数值模拟[J].灌溉排水学报,0,():-. |
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| Distribution characteristics and numerical simulation ofinfiltration and migration of multi-point source drip irrigation in red soil hilly area |
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Pei Qing Bao
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Jiangxi water conservancy research institute nanchang
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| Abstract: |
| In order to grasp the nutrient migration and distribution law in integrated irrigation of water and fertilizer in red soil hilly area, and provide guidance for navel orange drip irrigation design and Simulation of water and fertilizer migration.Field experiments were conducted to study the 〖NO〗_3^--N transport and distribution in red soil under different drip irrigation discharge and drip spacing. A model of water and fertilizer solute transport in red soil with multi-point source was established by Hydrus-3D.The results of experiment and simulation show that: The larger the dripper spacing is the wider the distribution range of drip irrigation, and the smaller the intersection area of nutrients is the smaller the discharge, and the easier the fertilization blank area is to be formed in irrigation.Comprehensive analysis showed that the dripper spacing was 30 cm and the flow rate was 1L/h, which was most suitable for navel orange drip irrigation in red soil.Hydrus-3D simulation results show that the average error between the simulated and measured values is less than 11%. The model can be used to simulate nutrient transport and distribution in red soil region. |
| Key words: Red soil hilly area; Multi-point source drip irrigation; ; numerical simulation |
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