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一、河北平原基本情况河北平原是黄淮海大平原的重要组成部分,西依太行山,北靠燕山,为黄河及海滦河多年淤积而成,面积7.4万平方公里,占全省总面积的40%,耕地近7,000万亩,占全省耕地面积的70%,人口3,640多万,占全省总人口的71%,每平方公里平均近500人.平均气温10°～13℃,无霜期180～220天,适宜于小麦、杂粮等一年两熟作物和棉花、水稻的生长,自古以来是我省农业生产的主要基地.海滦河系各支流呈扇形分布,原短流急,洪水汇集较快.各河进入平原后,坡度变缓,泥沙淤积,河槽宽浅,深槽很小.汇流处形成
First, the basic situation of Hebei Plain Hebei Plain is an important part of the Huang-Huai-Hai Plains, according to the Taihang Mountains in the west, Yanshan in the north, for the Yellow River and sea Luanhe siltation for many years, an area of 74,000 square kilometers, accounting for 40% of the total area of the province %, Arable land of nearly 70 million mu, accounting for 70% of the province’s arable land area, population 36.4 million, accounting for 71% of the total population of the province, an average of nearly 500 people per square kilometer average temperature of 10 ° ~ 13 ° C, frost- 220 days, suitable for wheat, miscellaneous grains and other crops two crops a year and the growth of cotton, rice, since ancient times is the main base for agricultural production in our province .Huan Luan River tributaries fan-shaped distribution of the original short flows urgent, the flood pooling more Quickly, after entering the plains, the slopes of the rivers became gentle, the sediments were silted, the flutes were shallow and the deep grooves were small.