基于土壤入渗水量分布特性的微喷灌系统组合分析

通过显色示踪方法研究了微喷条件下入渗水量分部模式，在此基础上探讨了微喷组合布置形式。试验结果显示喷洒水量分布为2次曲线情况下，入渗后水量分部符合4次曲线；同时分布峰值位置沿半径方向向外侧偏移，而含水率变化量在垂直方向分布差异性较小。依据实际入渗水量分布情况，采用正方形组合方案对系统的灌溉效率进行评价，组合间距为1.1倍有效喷程时，均匀系数最大。基于入渗水量分布进行微喷灌组合将能有效地提高灌水质量和效率。

Micro-sprinkler irrigation system portfolio analysis based on the soil infiltration of water distribution characteristics

With the method of stained tracer to test the distribution characteristics of water in the soil infiltrating form single nozzle, water distribution and its peak position of infiltrating water is obviously different from spraying water distribution circumstances，according to the actual distribution of soil water after the infiltration of irrigation water, using a square portfolio program to evaluate irrigation efficiency of sprinkler system and to optimize the nozzle combination, come to the result that when square combination spacing is 1.1 times of the effective spraying spacing, the uniformity coefficient of water after infiltration reached maximum 0.8, while based on the distribution of surface water, the optimal combination spacing and the largest coefficient is different, and modeling based on the actual soil water distribution after infiltration is more realistic and will help to improve irrigation efficiency.