密西西比河在下游分流出阿查法拉亚河,分开入海。两条河流量都在北美前五:In Louisiana, the Mississippi River bifurcates into the Atchafalaya River. The Atchafalaya is 137 miles long and is the fifth largest river in North America, by discharge.
https://en.wikipedia.org/wiki/River_bifurcation
上面Orinoco河分流去亚马逊流域的河道比较小,Orinoco入海口流量比长江还高