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本文提出了设计滴灌系统的诸模图,这些诸模图涉及到参考点处的灌水量、植物吸水量及土水势。。假定土壤导水率 K 与压力水头 h 的关系是 k_0e~(αh),其中 k_0、α为特定士壤的经验常教。这些诸模图既考虑了在地表上的点源或盘形源,又考虑了在地表上或在地下深度为 d 处的一组直线源。对点或盘形源、植物从一个园柱体或地下的一个水平园盘内吸水,参考点选在最大吸水深度水平园盘的边缘。而对于线源组则假设植物吸水方向是一维的,其参考点选在两条线源正中深为 Z_M 处;诸模图便于应用,而且计算简单。
In this paper, the design of drip irrigation system model charts, these model maps related to the reference point of irrigation, plant water absorption and soil water potential. . It is assumed that the relationship between the soil hydraulic conductivity K and the pressure head h is k_0e ~ (αh), where k_0 and α are the empirical lessons of a specific soil. These models take into account either point sources or disc-shaped sources on the surface, as well as a set of linear sources at the surface or at depth d. To a point or pan source, plants draw water from a garden or a horizontal pan beneath the ground, with reference to the edge of the disc at the maximum water depth. For line source group, it is assumed that the water uptake direction of plants is one-dimensional. The reference point selection is Z_M at the middle of the two line sources. The model maps are easy to apply and simple to calculate.