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目前,在世界各地,水平畦田灌溉仍是一种重要的灌水方法,其声望在过去的15年里迅速提高。为此,本文就畦田灌溉条件下水流模型的研究及其应用作了简要介绍。 近年来,国外一些学者在水平畦田灌溉中采用了Strelkoff与Kotopodes(1977)提出的零惯量法,他们均应用了数值解法并对零惯量微分方程进行离散处理以便将其转换成非线性代数方程式,然后通过Rreissmonn双曲线算法求解。此法为一种高斯消除法,其缺点是这些方程均被局部线性化,精度不够理想而且较为复杂。为克服上述缺点,GerdH·Schmitz和Gunther J·Sens对零惯量微分方程式稍加修改,为水平畦田灌溉提供了一个简单的易于应用的数学模型。
At present, horizontal irrigation is still an important method of irrigation in various parts of the world and its reputation has risen rapidly over the past 15 years. For this reason, this paper briefly introduces the research and application of water flow model under the irrigation condition of Qi Tian. In recent years, some scholars abroad adopted the zero inertia method proposed by Strelkoff and Kotopodes (1977) in the horizontal field irrigation. They applied numerical solution and discretely processed the zero inertia differential equation to convert it into nonlinear algebraic equation. Then solved by the Rreissmonn hyperbola algorithm. This method is a Gaussian elimination method, the disadvantage is that these equations are locally linear, the accuracy is not ideal and more complicated. To overcome these shortcomings, Gerd Schmitz and Gunther J Sens slightly modified the zero-moment differential equation to provide a simple and easy-to-use mathematical model for horizontal irrigation.