Find (in books or journals, or online) an aquifer system and describe its main characteristics. Look at the aquifer type, size, location, its geology, the source of water, its relation to other aquifer and surface water bodies, how the aquifer is used, how water levels (piezometric heads) changed in time, etc. Use less than 500 words (one page) of text.
Figure: San Joaquin aquifer system. Source: United States Geological Survey, https://pubs.usgs.gov/fs/2009/3057/