Groundwater

Aquifers -An aquifer is where groundwater is held in large quantities within material’s pore spaces. -Water table is the highest level of water in an aquifer.

Porosity and Permeability - Porosity is the percentage of pore space in rock material. •Shape and size determine the space. Well-sorted material has higher porosity. - Permeability is the rate (cm/sec) that water can move through rock material.

Geysers and hot springs

Accessing Groundwater

Groundwater Use

Ogallala Aquifer

Soil Texture Greater than 2 mm = gravel/stones 0.05 – 2 mm = sand 0.002 – 0.05mm = silt Less than 0.002 mm = clay