Mobile Bay is an inlet of the Gulf of Mexico, lying within the state of Alabama in the United States. The conversion of natural landscapes around the Bay to agricultural or urban use has eliminated the ecosystem services they provided and negatively impacted submerged aquatic vegetation and Gulf fish species. These impacts on the Bay, as well as changes in salinity levels and climate change are the subject of ongoing research. 

The mouth of Mobile Bay is formed by the Fort Morgan Peninsula on the eastern side and Dauphin Island, a barrier island on the western side. The Mobile River and Tensaw River empty into the northern end of the bay, making it an estuary. Several smaller rivers also empty into the bay: Dog River, Deer River, and Fowl River on the western side of the bay, and Fish River on the eastern side. Mobile Bay is the fourth largest estuary in the United States with a discharge of 62,000 cubic feet (1,800 m3) of water per second. Annually, and often several times during the summer months, the fish and crustaceans will swarm the shallow coastline and shore of the bay. This event, appropriately named a jubilee, draws a large crowd because of the abundance of fresh, easily caught seafood it yields. Mobile Bay is the only place on earth where jubilees are a common occurrence. 

Mobile Bay is 413 square miles (1,070 km2) in area. It is 31 miles (50 km) long with a maximum width of 24 miles (39 km). The deepest areas of the bay are located within the shipping channel, sometimes in excess of 75 feet (23 m) deep, but the average depth of the bay is 10 feet (3 m). Land‐use and land‐cover change can negatively impact Gulf coast water quality and ecological resources. The conversion of forest to urban cover types impacts the carbon cycle and increases the freshwater and sediment in coastal waters. Increased freshwater runoff decreases salinity and increases the turbidity of coastal waters, thus impacting the growth potential of submerged aquatic vegetation, which is critical nursing ground for many Gulf fish species. 

(Source Wikipedia and Mobile Bay National Estuary Program) 

This model grid contains 2,543 cells, and is a combination of a Cartesian grid for the bay and a curvilinear grid for the upstream tributaries, with average orthogonal deviation of 2.06 degrees. This grid was built using EFDC+ Explorer and Grid+.