Isaiah 19v5 Has the river of Egypt identified as the Nile in RSV ever dried up?

Reading the context of a passage often helps to determine its meaning. Verse 1 of Zechariah 10 refers to the 'latter rain' and so the events recorded in verse 11 have yet to happen.

Zech 10:11, And he shall pass through the sea with affliction, and shall smite the waves in the sea, and all the deeps of the river shall dry up: and the pride of Assyria shall be brought down, and the sceptre of Egypt shall depart away.

Let's study the Chronology of the verse in question;

first, .......... the river shall dry up.

second, The pride of Assyria shall be brought down.

third, and the sceptre of Egypt shall depart away.

The second and the third have already happened, the first did not; therefore my opinion is, Zech 10:11 is a failed prophecy or it hasn't happened yet.

A Scepter is nothing more than a symbol of authority or rule. Egypt is still a country. Therefore, it still holds its scepter.

In either case, the river Nile has dried up once in history. I suggest you look it up.