本文乃將滴灌系統內支管的水流情況考慮為平滑管內之紊流狀態,應用一般的能量坡度無量次曲線來估測沿著支管上滴孔的流量變化。設計圖乃用來決定理想的支管長度與管內的壓力,使之能達到95%以上之均勻係數。
The Friction drop in a drip irrigation line can be determined by considering turbulent flow in a smooth pipe. A general shape of the energy gradient line which can be applied to estimate distribution and variation of emitter discharge along the lateral. A design chart is presented for determining an acceptable combination of lateral lengths and inlet pressure of a drip irrigation system.