Ummm .. the Nile is 4000+ miles long and traverses the geology of almost an entire continent. Might be useful if you refined what 'Part of' means. Chapter Nile River Bathymetry by Satellite Remote Sensing Case Study...
To calculate the level of the bottom of a part of the Nile River, you would need to obtain bathymetric data for that section of the river. Bathymetric data provides information about the depth and shape of the river bottom.
There are several ways to obtain bathymetric data for the Nile River, including:
Once you have obtained the bathymetric data, you can use it to calculate the level of the bottom of the river in the area of interest. This can be done by subtracting the depth of the river at a specific point from the water level of the river at that same point. The resulting value will give you the level of the bottom of the river at that location.