黄河下游是一条河床高于两岸地面的地上河。此地上河并非只是今天的情形,而是在历史上即已出现。有关于历史时期黄河下游地上河的问题,大多数对于黄河的研究都未曾对此做专门关注,即使提及地上河,一般亦一带而过,没有明确黄河下游在历史时期某一时期,某一条流路形成地上河的过程,也没有具体分析某一时期黄河下游形成地上河的具体原因。尤其是明代以前由于年代久 The lower reaches of the Yellow River is a river above the ground on both sides of the river. The river here is not just the case today, but it has already happened in history. There is no question about the study of the Yellow River in the history of the Yellow River. Most of the studies on the Yellow River did not pay any special attention to it. Even if it refers to the aboveground river, it generally passes by. There is no clear indication that at a certain period of the historical period, The formation of the river flow path process, there is no specific analysis of the specific reasons for the formation of groundwater in the lower reaches of the Yellow River during a period of time. Especially before the Ming Dynasty due to the age