Ground water.
Water is typically drawn from a water table, which is the upper surface of groundwater below which the soil or rock is saturated with water. This water table can vary in depth and can be affected by factors such as precipitation, groundwater pumping, and local geology.
pour it out from the table./
If the layer of impermeable rock is below the water table, then the water table is likely above the impermeable rock and the groundwater will be trapped above it. If the impermeable rock is above the water table, then the water table is likely below the impermeable rock layer and the groundwater will not be able to pass through it.
Below the water table is the saturated zone, where the pores in the rock or soil are filled with water. This is where groundwater is stored and flows, providing water for wells and springs. The unsaturated zone above the water table contains both air and water in the pores.
According to the USGS, the water table in Houston ranges between 10 and 30 feet below the surface. (See link below). An exception is in Katy, where it is more than 75 feet deep. From personal experience, the water table is about 14 feet below my property--about 1/4 mile from Oyster Creek in Sugar Land.
ground water
Water is typically drawn from a water table, which is the upper surface of groundwater below which the soil or rock is saturated with water. This water table can vary in depth and can be affected by factors such as precipitation, groundwater pumping, and local geology.
pour it out from the table./
water table
water table
water table
above the water table
a mud table
The water table is the level below the ground where all spaces are filled with water. Wells are structures dug or drilled into the ground to access the water below the water table. The depth of a well is determined by the distance between the water table and the surface.
If the layer of impermeable rock is below the water table, then the water table is likely above the impermeable rock and the groundwater will be trapped above it. If the impermeable rock is above the water table, then the water table is likely below the impermeable rock layer and the groundwater will not be able to pass through it.
Below the water table is the saturated zone, where the pores in the rock or soil are filled with water. This is where groundwater is stored and flows, providing water for wells and springs. The unsaturated zone above the water table contains both air and water in the pores.
If the bottom of a well is above the water table, the well would be dry.