摘要
作者认为黄河在东汉以后至唐８００余年并非长期安流，有关少数民族内迁、改农归牧恢复了自然植被，使水土流失减轻的论点不能成立。
By analysing the history of disastrous floods in the lower reaches of the Yellow River, two conclusions are followed: firstly, the Yellow River lower reaches were not in a safe and sound condition during the period from the Eastern Han Dynasty to the Tang Dynasty; secondly, the author thought that some minority nationality moved to the middle reaches of the Yellow River and the land use pattern from agriculture to animal husbandry did not reduce soil erosion.
