高速公路中央绿化带大孔自压微灌的灌水均匀度研究

Research on Irrigation Uniformity of Large-hole Gravity Micro-irrigation in Expressway Central Greenbelt

以云南保(山)腾(冲)高速公路为例,开展中央绿化带大孔自压微灌技术研究及应用示范。首先提出了中央绿化带示范段的灌溉目标和系统设计,构建大孔微灌管的水力学模型并编制Matlab计算程序,对不同管材选择、管径大小、孔径大小以及孔距等要素进行试算,以判定灌溉系统设计方案是否满足设定的灌溉系统均匀度参数要求,最后对方案进行了实验验证。结果表明:通过变孔径大孔自压微灌技术,可在满足防堵塞性能的基础上,保证灌水均匀度,提高灌溉质量和灌溉保证率。

Technological research and application demonstration of large-hole gravity micro-irrigation in expressway central greenbelt were carried out on the basis of Bao-Teng（Baoshan-Tengchong） Expressway in Yunnan Province. First,irrigation goal and system design of demonstration part of the expressway central greenbelt were put forward; next hydraulic model and relevant Matlab program about large-hole micro-irrigation were set up to make a preliminary calculation of the type,diameter,distance and other factors of the pipe holes; then the whole design of the irrigation system was examined to check if it had met the designed irrigation uniformity demands and it was eventually verified by experiments. Results showed that： irrigation uniformity can be ensured with the technology of large-hole gravity micro-irrigation with variable hole diameters under the condition of block prevention,and thus the irrigation quality and efficiency can be improved.