灌水沟指在作物行间开挖的、用以实施灌溉的垅沟。
n. corrugation
misc. irrigation ditch ; feed ditch
坡度大于2%时，灌水沟很难避免冲刷侵蚀。
Irrigation furrows with slope gradients steeper than 2% are difficult to irrigation without erosion.
对相似的土壤和坡度，畦田长度和灌水沟的长度雷同。
Their lengths are similar to the lengths of furrows on comparable soils and slope gradients.
灌水沟的长度受到在灌水时间内灌溉水流动距离的限制。
The length of irrigation furrows is limited by the distance irrigation streams will flow during an irrigation period.
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