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

湿区旱田补充灌溉成熟度研究

基本信息

批准号：
61304027
负责人：
KOIDE Susumu
金额：
$ 6.27万
依托单位：
Tokyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

项目摘要

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.

有意见认为利用雨水可以节省高地灌溉的费用。设计年有效降雨量为零的年份为灌溉期，为每10年一年。因此，我们不能减少农业用水设施的能力，如农田池塘、喷灌机、水泵等，但可以减少水库的容积。据调查，旱地农田日需水量在5mm以上的农区很少。若旱地用水量减半，则高地灌溉费用降低33%。但绿色室内园艺流行的地区并不能减少它的田间需求。桑迪土壤也是如此。将桑迪与吸水性高的聚合物混合后，其吸水性达到高等级。因此，桑迪土壤的田间需求量可以减少。但田间对壤土的要求不能降低。东北地区的农民使用高地灌溉来控制除苹果以外的水果的病虫害。他们也用它来清洗农业机器和蔬菜。一天的需水量是两个三角形。若安全系数为1.5，则每公顷养殖池塘的容积为20 m^3。