Biological problems of Delta of Ebro

1.LOCATION AND GEOLOGICAL DESCRIPTION OF THE DELTA OF THE RIVER EBRO

The delta of the River Ebro is on the north-eastern coast of Spain, in the province of Tarragona, in the Autonomous Community of Catalonia. Delta of the River Ebro has a coastal length of approximately 50km. It is basically a plain, not exceeding a height of 4 or 5m above sea level. Geological mapping of the delta shows that the delta plain is occupied by quaternary Holocene sediments, deposited on a gravel base, largely made up of coarse and medium sand, muddy clays and mud, and with an upper layer of medium and fine sand. 

2. HISTORICAL EVOLUTION OF THE EBRO DELTA SHORELINE

3. WHY IS THE EBRO DELTA RECEDING? 

The last 28km of the River Ebro run through the delta plain, showing notably different characteristics to the ones it has upstream, where it has been considerably altered during the second half of the 20th century. These changes are largely due to the construction and use of numerous dams throughout its basin, particularly those at  the River Ebro.