Final answer:
Three conditions that favor the formation of artesian basins include the presence of a confined aquifer, a tilted or sloping aquifer, and a recharge area located at a higher elevation than the basin.
Step-by-step explanation:
Formation of artesian basins is favored by three main conditions:
The presence of a confined aquifer: An artesian basin forms when an aquifer, which is a layer of porous rock or sediment that holds water, is confined between impermeable layers of rock above and below it. The impermeable layers create pressure within the confined aquifer, causing water to flow to the surface when a well is drilled. This creates a natural spring.
A tilted or sloping aquifer: The aquifer in an artesian basin is usually tilted or sloping, which allows water to accumulate and build up pressure.
The slope acts as a natural conduit for the water to flow back up to the surface.
Recharge area: An artesian basin needs a recharge area where rainwater can infiltrate the ground and replenish the aquifer.
The recharge area should be located uphill or at a higher elevation than the basin, allowing gravity to drive the water flow.