In the northern hemisphere, the best place to build a house by the river should be on the left bank or the right bank. Why?

Affected by the geostrophic force, the river flows from west to east, which will scour the right bank (a little more on the south bank). If it is built on the south bank, it will erode the foundation. It is best to build it on the north bank, so that the foundation will not be eroded. China pays attention to geomantic omen. Built on the north bank facing the south bank, the light will be good.