There is no liquid water on Mars.
They believe that it is from water flow.
no but it used to
slowly water leaking from the hole
Mars is too cold for liquid water to flow on the planet surface
No, they were stone built and the water was designed to flow slowly as the gradient was slight, there would be minimal erosion due to flow.
There is geological evidence that Mars may have had bodies of water. There are parts of the planet that seem like they had water flowing on it, or were eroded by water flow.
bog
Venus and Mercury rotate slowly, much more slowly than Earth or Mars.
On mars there is so hot and slowly slowly it get very hot
Gullies are formed by running water. The water washes down to low point, and the flow slowly erodes the dirt into a gully.
Viscosity is a property of liquids, showing that liquid's resistance to flow. A liquid with a high viscosity would mean it flowed slowly. A liquid with a low viscosity would mean it flows rather quickly.
How much water does Mars have?