✔ 最佳答案
North Yellow River's He Tao section and the downriver enters the seato be partial south side, can compare the section of river to shift toan earlier time ices up and retards melts the ice. When winter, norththe He Tao and the river mouth section of river first ices up; Whenspring, south south of the He Tao and the river mouth the section ofriver first melts the ice, produces the massive friendly ice water andthe garrulous ice piece, but because north the section of river notyet Kaifeng, causes the rivers water level rise; Two causes the rivercourse to block the overflow, forms 氾 overflows. Middle and upper reaches Yellow River not the big lake adjusts therivers current capacity and filters the slag, also has facilitated theappearance which overflows.