Flat Earth proof: WATER

Read and Think About it 

Water is an irrefutable proof of flat earth because water always seeks it's level and remains that way when unmanipulated.
Earth cannot be a globe because all oceans are flat hence the term "sea level". 
With the earth being over 70% water it's common sense the earth is flat and not a spinning spheroid. All rivers run downhill not uphill.

The physics of water is to always seek it's level no matter the container it is in, that is reality not assumption.

The longest rivers are thousands of miles in length. Many, like the Nile and the Missouri are in central valley plains and deserts with little or no elevations.

However, given the curvature of the Earth, larger rivers would have to follow the arc. If flowing towards the Equator or Poles, they would have to flow uphill, if flowing away, then downhill, sometimes both. Yet this most basic of physics must occur on a globular Earth, yet does not.

The Mississippi River is one of the world’s major river systems in size, habitat diversity and biological productivity. It is the third longest river in North America, flowing 2,350 miles from its source at Lake Itasca through the center of the continental United States to the Gulf of Mexico.
At the headwaters of the Mississippi to the NW, the average surface speed of the water is near 1.2 miles per hour. Downstream at New Orleans the river flows 3 miles per hour on average. This is impossible on a ball where the river has to flow upwards towards the highest point at the Ecuador.

The Earth cannot be a sphere.

“Whoever heard of a river in any part of its course flowing uphill? Yet this it would require to do were the Earth a Globe. Rivers, like the Mississippi, which flow from the North southwards towards the Equator, would need, according to Modem Astronomic theory, to run upwards, as the Earth at the Equator is said to bulge out considerably more, or, in other words, is higher than at any other part. Thus the Mississippi, in its immense course of over 3,000 miles, would have to ascend 11 miles before it reached the Gulf of Mexico!” 

-David Wardlaw Scott, “Terra Firma” 

The Nile, longest river in the world, c.4,160 mi (6,695 km). The Nile flows northward and drains about one tenth of Africa, including parts of Egypt, Sudan, Ethiopia, Eritrea, South Sudan, Kenya, Uganda, Rwanda, Burundi, Tanzania, and Congo (Kinshasa).

The Nile runs in a desert basin. If half circumference of the Earth is 12,000, this means that the Nile would have to descend while traveling North some 16 miles, but it doesn’t.

Again the Earth cannot be a spherical spinning ball and it's NOT because the Earth is a FLAT STATIONARY PLANE.