The Department of Transportation, for example, requires that recipients of its funding award a percentage of contracts to minority-owned businesses and many large companies have goals for buying from minority-owned suppliers. The reason for such mandates is twofold.
A coastal zone is the interface between the land and water. These zones are important because a majority of the world's population inhabit such zones. The tidal bulges result in a rhythmic rise and fall of ocean surface, which is not noticeable to someone on a boat at sea, but is magnified along the coasts. 2  Usually there are two high tides and two low tides each day, and thus a variation in sea level as the tidal bulge passes through each point on the Earth's surface.
An estuary is a partly enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea.Estuaries form a transition zone between river environments and maritime environments.his broad definition also includes fjords, lagoons, river mouths, and tidal creeks. An estuary is a dynamic ecosystem with a connection with the open sea through which the sea water enters with the rhythm of the tides.