The Danube is Europe’s second-longest river, after the Volga River, and also the longest river in the European Union region. It is located in Central and Eastern Europe. It has numerous industry and urban areas along its length raising interest among researchers, industry and the environmental regulatory community. 

The Danube flows through 10 countries. Originating in Germany, the Danube flows southeast for 2,860 km (1,780 mi), passing through or touching the border of Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova and Ukraine before emptying into the Black Sea. Its drainage basin extends into nine more countries (Wikipedia). 

This model grid contains 22,875 cells, with an average orthogonal deviation of 1.48 degrees. The grid stretches from Lalomiţa County, Romania, to the sea. This grid was built in multiple stages and joined to together to make one complete grid in EFDC+ Explorer and Grid+.