Studies on the maturity of the supplementary upland field irrigation in the wet area.

有意见认为，利用雨水可以节省旱地灌溉费用。设计年是否为零是灌溉期，即每十年一次。因此，我们不能削减农业用水设施的能力，如农用池塘、喷头、水泵等，但我们可以削减水库的体积。据调查，旱地需要量每天超过5毫米的农业区很少。如果旱地需要量减半，旱地灌溉费用降低到33%。但温室园艺大行其道的地区并不能降低它的田间需求。沙土中的地区也是如此。如果将沙质土壤与吸水聚合物混合，其吸水性就会变得很高。因此，可以减少对沙质土壤的田间需求。但对壤土的田间需求量不能降低。东北地区的农民利用旱地灌溉防治除苹果以外的水果的病虫害。他们还用它来清洁农业机械和蔬菜。一天的需水量模式是两个三角形。假设安全系数为1.5时，每公顷农家鱼塘的体积为20m^3。

There is the opinion saves the expense of the upland field irrgation with the use of the rain. It is irrigation period that the effective rainfall is zero in the whether of the design year, which is one year per ten years. So, we can not cut down the ability of agricultural water facilities, such as farmpond, sprinkler, and pump etc. But we can cut down the volume of reserviors. There are few agricultural areas which upland field requirements are over 5 mm per day by investigations. If the upland field requirement is half, the expense of the upland field irrigation is reduced to 33%. But the areas where green house horticultures are in popular can not reduce it's field requiremants. And areas in sandy soil are too. If it mixes the sandy soil and polymer which absorvs water, it's absorption of water becomes the high grade. So, the field requirement of sandy soil can reduce. But the field requirement of loam can not reduce. Farmers in Tohoku district use the upland field irrigation to the disease and pest control of fruits except apple. They use it to the cleaning of farm machines and vegetables too. The pattern of the water requirement in one day is two triangles. If the safety factor supposes 1.5, the volume of farmpond is 20 m^3 per 1 ha.