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1 问题的提出河南省处于黄河的中下游。全省26处引黄灌区总灌溉面积70.53万hm~2,包括39个县(市)1830万人,引黄灌区占全省灌溉面积的15.63%。花园口水文站1951～1999年实测资料,黄河在河南境内多年平均径流量443.3亿m~3,多年平均输沙量为11.45亿t,平均含沙率25.84kg/m~3,汛期含沙量52kg/m~3,非汛期含沙量
1 The Proposed Issue Henan Province is located in the middle and lower reaches of the Yellow River. The total irrigation area of 26 irrigation districts in the whole province is 705,300 hm 2, including 18.3 million people in 39 counties (cities) and 15.63% of the irrigated area in the whole province. Huayuankou Hydrological Station 1951 ~ 1999 measured data, the Yellow River in Henan Province for many years the average runoff of 44.33 billion m ~ 3, the average annual sediment transport was 1.145 billion t, the average sediment yield of 25.84kg / m ~ 3, flood season sediment 52kg / m ~ 3, non-flood season sediment concentration