论文部分内容阅读
1 节水灌溉工程现状1.1 明硬渠灌溉明硬渠灌溉工程采用的是田间沟畦输水灌溉,在各农户责任田内留有进水口。自1985年至今,长葛市共发展明硬渠6.55万 m,控制灌溉面积0.36万 hm~2。目前,能够正常运用的明硬渠道仅有1.60万 m,控制灌溉面积0.09万 hm~2,较建设之初灌溉面积衰减0.27万 hm~2,占总控制灌溉面积的75%。灌溉
1 water-saving irrigation project status 1.1 bright and hard canal irrigation Bright and hard canal irrigation project is the use of field ditch water transport irrigation, farmland in each farmer responsibility to leave a water inlet. Since 1985, a total of 65,500 m of hard and soft ditches have been developed in Changge City, controlling an area of 36,600 hm 2 irrigated. At present, only 16,000 m of hard and hard channels can be used normally, with an area under control of 0,900 hm ~ 2, an irrigation area of 27,000 hm ~ 2 less than that at the beginning of construction, accounting for 75% of the total controlled irrigation area. irrigation