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河南省分属长江、淮河、黄河、海河四大流域,按地势分为山区、丘陵和平原,总面积16.7万km~2,其中平原区为9.30万km~2,占总面积的55.8%,是我省重要的粮棉油产地和商品粮生产基地。解放初期,平原地区河道防洪除涝能力低,洪涝灾害十分频繁和严重,经过几十年的治理,平原河道排水能力普遍得到了提高,农业生产条件有了较大的改善。但受地形的影响,山区洪水进入平原后,受
Henan Province is divided into the four major drainage areas of the Yangtze River, Huaihe River, Yellow River and Haihe River. They are divided into mountains, hills and plains according to their topography. The total area is 167,000 km 2, of which 93,000 km 2 are plain areas, accounting for 55.8% of the total area. It is an important grain and cotton oil producing area in our province and a commodity grain production base. In the early period of the liberation, flood control and waterlogging capability of the river courses in the plains was low and flooding and disasters were frequent and serious. After several decades of treatment, the drainage capacity of the plains was generally improved and the agricultural production conditions were greatly improved. However, affected by the terrain, the mountain floods into the plain, subject to