In historical period, the lower reach of Yellow River frequently changed its course and flooded over the bank, which caused the soil change and influenced the normal development of the civilization in the plain.
In historical period, the lower reach of Yellow River frequently changed its course and flooded over the bank, which caused the soil change and influenced the normal development of the civilization in the plain.
历史时期黄河下游频繁的改道、泛滥，不仅造成黄淮海平原土坡中微量元素的变化，而且也严重影响了黄淮海平原文明进程的正常发展。