20世纪上半期政局动荡不安,河务管理弊端丛生;经济形势严峻,社会秩序混乱不堪。在这50年间,黄河水患频繁发生,造成劳动力丧失,土地沙碱化现象严重,影响了黄河三角洲地区农业的发展;造成黄河三角洲社会秩序混乱;水患后,政府迁民开荒新淤陆地,促进了黄河三角洲地区的开发。 The turmoil in the political turmoil in the first half of the 20th century caused a series of troubles in river management; the economic situation was grim and the social order was disrupted. In the past 50 years, floods frequently occurred in the Yellow River, resulting in the loss of labor force. The serious phenomenon of soil sands and alkalization of land affected the development of agriculture in the Yellow River Delta region and caused social disorder in the Yellow River Delta. After the floods, Development of the Yellow River Delta.