How many rivers would an ancient Mesopotamian have to cross to get from Borsippa to Eshunna traveling the most direct route? plz I need help

I’m guessing probably a

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.

There is a great difference between the windward and leeward side of a mountain. windward and leeward sides are opposites.