| 引用本文: | 郑欣荣,樊 煜,高占义,等.基于渠道水动力学的全渠系优化配水模型及其应用研究[J].灌溉排水学报,2024,43(8):30-38. |
| ZHENG Xinrong,FAN Yu,GAO Zhanyi,et al.基于渠道水动力学的全渠系优化配水模型及其应用研究[J].灌溉排水学报,2024,43(8):30-38. |
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| 摘要: |
| 【目的】解决传统配水模型中配水时间和流量与实际供水过程不匹配的问题，实现灌区精准配水。【方法】建立基于渠道水动力学的全渠系优化配水模型，以大流量和尽早配水为目标，以渠道过流能力、配水流量、配水顺序、水量平衡、分水口分水过程和渠道输水损失为约束条件，利用一维水动力模型进行配水模型的构建与推演。【结果】将所建立的模型应用到具有四级渠道的某灌区中，结果表明，总干-干渠-支渠-斗渠之间的配水时间和流量配合良好，实现了灌溉过程的全渠系配水。与传统配水模型相比，各级配水渠道的配水开始时间和结束时间更贴合实际供水过程，四级灌溉渠道的配水流量和配水量也能满足农田需水要求。模型采用自上而下依次灌溉的方式进行配水，贴合灌区配水情况，更有利于灌区管理者对闸门的调控。【结论】本研究所构建的基于渠道水动力学的渠系优化配水模型可以实现灌区的精准配水，可显著提高灌区配水效率。 |
| 关键词: 渠系；配水；模拟；灌区 |
| DOI：10.13522/j.cnki.ggps.2023492 |
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| Optimizing water allocation across canal networks based on channel hydrodynamics: Modelling and application |
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ZHENG Xinrong, FAN Yu, GAO Zhanyi, ZHOU Ke, ZHANG Xufeng
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1. China Agricultural University, College of Water Resources and Civil Engineering, Beijing 100083, China;
2. China Institute of Water Resources and Hydropower Research, State Key Laboratory of Simulation and Regulation of
Water Cycle in River Basin, Beijing 100038, China
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| Abstract: |
| 【Objective】The mismatch between water distribution time and water flow rate is an issue in distributing water across canal network systems. This paper proposes an optimal method to allocate water across canal networks in irrigation districts.【Method】The method was based on channel hydrodynamics. The objective of the optimization was to maximize flow water distribution and expedite water allocation. The constraints included channel discharge capacity, water distribution rate and sequence, water balance, bifurcation diversion processes, and channel transmission losses. The optimal water distribution was obtained by solving the one-dimensional hydraulic model for each channel. The model was applied to irrigation districts with four-level of channels. Aligning with water distribution practices in the irrigation districts and for facilitating gate regulation management, the model adopted a top-down irrigation approach.【Result】The optimal method coordinated the timing and flow of water distribution in the main canal, branched canals, lateral canals and field canals well, achieving a well-balanced water distribution in each irrigation event. Compared to traditional water distribution, the proposed method improved the start and end timing of water distribution in each level of the canals; the results were more aligned with the real water supply process. Water flow rate and volume in the canals at the end-level can meet the water demand.【Conclusion】The channel hydraulic-based optimization method we proposed for water distribution can accurately allocate the water over the irrigation area and improve the efficiency of water distribution management. |
| Key words: canal system; water distribution; simulation; irrigated region |
