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1 灌区概况开封市黑岗口灌区分布于开封市郊区大部分和开封县小部分,控制面积1.6万hm~2。灌区现有干渠4条,总长55km,支渠39条,总长107.9km,斗渠99条,总长111.6km,灌区现有机井2600多眼,郊区农业灌溉主要以引黄灌溉和井灌为主,有效灌溉面积1.0万hm~2,其中引黄灌溉面积0.16万hm~2,井灌面积0.1万hm~2,井渠双灌面积0.2万hm~2。2 发展节水灌溉的必要性本区属温带大陆性季风气候,温热变化明显,年平均气温14℃左右,年平均降雨量634.2mm,多年平均蒸发量1955.7mm,地下水埋深为3～5m,单井出水量40～80m~3/t,多
An Irrigation District Overview Kaifeng Heikoukou Irrigation Area located in most of Kaifeng suburbs and a small part of Kaifeng County, the control area of 16,000 hm ~ 2. The existing irrigation canal 4, the total length of 55km, branch 39, total length of 107.9km, bucket channel 99, the total length of 111.6km, the existing irrigation wells more than 2,600 eyes, the main agricultural irrigation in the suburbs of the Yellow River irrigation and well irrigation, the effective irrigation area 10,000 hm ~ 2, of which the Yellow River irrigated area of 16,000 hm ~ 2, well irrigation area of 10,000 hm ~ 2, well irrigation and drainage area of 2 million hm ~ 2.2 The need for water-saving irrigation in this area is temperate continental The monsoon climate and warmth have obvious changes. The annual average temperature is about 14 ℃, the average annual rainfall is 634.2mm, the annual average evaporation is 1955.7mm, the groundwater depth is 3 ~ 5m, and the single well discharge is 40 ~ 80m ~ 3 / t.