Accumulation of pressures that can cause the entry of garbage into the sea from land in the Canary Islands (EM CAN PRE Terrestrial Waste)

To characterise marine litter of land origin as pressure, the following sources have been identified: coastal population centres, ports, bathing areas and municipal solid waste landfills. First, all cells located less than 10 km from the identified garbage sources have been selected.Next, it has been added to each cell:- The population associated with the population nuclei located within the radius of 10 km. — The surface of the ports within the radius of 10 km — The tourist population associated with bathing areas, assuming an average of 10,000 inhabitants/km of coast in the coastal areas of the Demarcation. — The presence/absence of a landfill (layer of selected landfills less than 2 km from the coast) The population and port area values have then been transformed to a scale of 1-3. For ports, the surface values have not been used directly, but the following index has been calculated for each cell: Ports = [Summ surface ports] + ([Cell surface area]/[Btruck surface area 10 km cell]) In this way, the following scale (scales applied in the garbage index) has been followed: — 1 Ports: 0 to 1; Population centres: 50,000; Tourist population: 50.000. — 2 Ports: 1 to 10; Population centres: 50,000 to 300,000 Tourist population: 50,000 to 200,000. — 3 Ports: 10; Population centres: 300,000 Tourist Population: 200.000. Finally, the resulting values have been added, as well as the presence/absence of landfills (values 0/1). The final values range from 1 to 10: Very High: 9 to 10/High: 7 to 8/Medium: 5 to 6/Low: 3 to 4/Very Low: 0 to 2.