| 摘要: |
| 为研究微喷带喷灌水的分布特征 ,依据微喷带单孔喷灌试验得到的数据 (喷水角度以 10°～ 90°设计试验 ) ,采用 DUD非线性数学模型的数据拟合方法 ,确定了微喷带单孔喷灌水分布的单峰和双峰的非线性数学模型。除 10°和 90°外 ,其他喷水角情况下采用双峰模型的拟合精度均明显高于单峰模型。由拟合模型的回归平方和与残差平方和可以看出 ,模型的拟合精度都很高 ,表明采用本文中的非线性数学模型 ,可以较好地描述微喷带喷灌水的分布。这对于进一步精确确定土壤水运动分布状态 ,同时对于优化设计微喷带设施都具有重要的指导意义 |
| 关键词: 单孔微喷带喷灌水 喷水量分布 数学模型 DUD算法 |
| DOI： |
| 修订日期：2002-01-31 |
| 基金项目: |
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| Mathematical Model of Distribution of Water Application Rate With Punched Thin-soft Spray Tape |
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| Abstract: |
| The character of water distribution with punched thin soft spray tape was studied. According to the obtained data from punched thin soft spray tape and single hole sprinkling trial(designed trial angle of sprinkling water is from 10 degree to 90 degree), certain non linear mathematical models of punched thin soft spray tape single hole of distributing water of single apex and double apices are made by using data fitting method of DUD arithmetic. Except 10 degree and 90 degree sprinkle angle, the fitting precision of all double apices is evidently higher than that of single apex. Judging from regression square sum of fitting model and residual square sum, it can be seen that all fitting precision was very high, and adopting non linear maths model can completely depict the character of the distribution of water application rate with punched thin soft spray tape. It is greatly instructive for making sure soil water moving distribution and optimizing the design of the punched thin soft spray tape apparatus instruments. |
| Key words: punched thin soft spray tape,distribution of water application rate,mathema tical mode,DUD arithmetic |
