Gross Irrigation Demand April Schedule: 20 Mm Net, 7 Day Cycle

This data set contains the GROSS IRRIGATION DEMAND Schedule: 20 mm net, 7 day cycle in South Africa. Gross irrigation demand is the gross irrigation water that needs to be abstracted from a source of water (e.g. dam) to satisfy the irrigated crop`s water requirement. Fixed Cycle / Fixed Amount Irrigation, is assumed to be by overhead irrigation with conveyance, wind/spray drift and interception losses of 10%, 12% and 1.5 mm per event thus being assumed, in each case with a 7 day cycle. The 20 mm day net application represents an equivalent of 3 mm water/day actually available to the plant.

本数据集包含南非地区的总灌溉需水量（Gross Irrigation Demand）计划表：净灌溉量为20毫米、灌溉周期为7天。总灌溉需水量指为满足灌溉作物的需水要求，需从水源（如水库）中抽取的总灌溉用水量。本次研究假设定周期定水量灌溉采用高架喷灌方式，单次灌溉的输水损失、风致飘移损失与冠层截留损失分别为10%、12%和1.5毫米，且所有灌溉均以7天为一个周期。本次设定的20毫米单次净灌溉量，换算后相当于作物每日可实际获取3毫米的水量。