Gross Irrigation Demand April Schedule: 15 Mm Net, 7 Day Cycle

This data set contains the GROSS IRRIGATION DEMAND Schedule:15 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 day per event thus being assumed, in each case with a 7 day cycle. The 15 mm day net application represents an equivalent of 2 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）方案：净灌溉量为15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（例如塘坝）中抽取的总灌溉用水量。
本方案采用固定周期/固定水量灌溉（Fixed Cycle / Fixed Amount Irrigation）模式，假设采用高架灌溉（overhead irrigation），并计入输水损失、风/喷溅漂移损失与截留损失，各损失参数分别为10%、12%以及单次灌溉对应1.5天的损失量，且所有场景均遵循7天的灌溉周期。
本次15毫米的单次净灌溉量，等效于每日可为作物提供2毫米的有效灌溉水量。