Taking the "yearly planing track". What about the yearly flooding of the Nile? https://en.wikipedia.org/wiki/Flooding_of_the_Nile https://en.wikipedia.org/wiki

Taking the "yearly planing track". What about the yearly flooding of the Nile? https://en.wikipedia.org/wiki/Flooding_of_the_Nile https://en.wikipedia.org/wiki/Flooding_of_the_Nile