| 引用本文: | 李会贞,李法虎,周新国,等.农田暗管-明沟组合排水系统布设参数计算与设计软件编程[J].灌溉排水学报,2018,37(6):101-108. |
| LI Huizhen,LI Fahu,ZHOU Xinguo,et al.农田暗管-明沟组合排水系统布设参数计算与设计软件编程[J].灌溉排水学报,2018,37(6):101-108. |
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| 摘要: |
| 暗管排水是高地下水埋深地区农田排水的主要方式之一。【目的】确定农田暗管-明沟组合排水系统的布设参数。【方法】根据农田排水理论，建立了农田暗管-明沟组合排水系统布设参数计算模型及其C#语言编程。【结果】在题设条件下，考虑地下水蒸发影响时的吸水管间距比不考虑其影响可增大2.9%~17.3%；吸水管间距由15 m增大到25 m时，地下水埋深降深减小24.7%~27.5%；当吸水管埋深由1.5 m增加到2.0 m时，地下水埋深降深可增大34.8%。计算结果与相关算例的最大相对差异小于1.2%，运行速度快，在5 s内可以完成计算过程，适用于不同土壤质地、地下水埋深、地下水蒸发条件和作物种植条件。【结论】设计的软件减轻了农田水利工程基层设计人员的工作量，可以进一步推广。 |
| 关键词: 暗管排水； 吸水管间距； 吸水管埋深； 计算模型； 软件编程 |
| DOI：10.13522/j.cnki.ggps.2017.0642 |
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| A Computer Software to Design Subsurface Drain and Open Trench as a Hybrid Drainage System for Farmland |
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LI Huizhen, LI Fahu, ZHOU Xinguo, SHI Xueshuang, ZHANG Wenchao
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College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
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| Abstract: |
| 【Objective】 Subsurface drain is a common drainage technique to keep groundwater table below a critical depth. The purpose of this paper is to present a model and computer program to help design subsurface drain and open ditch as a hybrid drainage system for farmland. 【Method】 The model was based on hydrodynamics of soil water and considered both drainage and evaporation; the water flow was solved numerically. 【Result】 For the cases we studied, considering evaporation allowed the distance between adjacent drains to increase by 2.9%~17.3% compared with scenarios without evaporation; increasing the drain-drain distance from 15 m to 25 m reduced the groundwater table drawdown by 24.7%~27.5%. Increasing the depth of the drain from 1.5 m to 2.0 m enhanced the groundwater table drawdown by 34.8%. Comparison with the literature results showed that the maximum relative errors of the model simulations was less than 1.2%. The code ran fast and, in most circumstances, could give the final results in less than 5 seconds. 【Conclusion】 The model and the software we developed can be used as a tool to design drainage systems to control soil salinity and to ameliorate waterlogging. |
| Key words: subsurface pipe drainage; pipe spacing; pipe buried depth; calculation model; software programming |
