Accumulation of pressures that can cause the entry of pollutants into the Strait and Alboran Demarcation (EM ESAL PRE Contamination)
Description
The cumulative pressure analysis has been carried out taking into account all polluting sources together. That is to say, no individual analysis has been carried out per pollutant, nor has it been taken into account whether the discharge is intentional or accidental, but the areas with the highest probability of contributions of polluting loads in the Demarcation have been identified. To do this, first a selection of mesh cells has been made, based on the following criteria:
The ones that contain some monobuoy.
- Those less than 500 m from an authorised dumping site for dredged material.
- Those that coincide with EMEP cells with higher loads of hazardous substances (those that add up to 50% of the total dioxin contamination and 25% by heavy metals, starting from the highest to the lowest sum).
Those that are less than 2 km from the mouth of a river.
- Those less than 2 km from municipal solid waste landfills.
- Those that are less than 5 km from the mining operations (active or inactive).
- Those that are less than 2 km from an urban spill.
Those that are less than 2 km from a port without traffic of dangerous goods.
Those that are less than 5 km from an industrial spill.
- Those less than 2 km from a transitional river or body of water that does not meet the chemical status (as indicated in the river basin plans).
Those that are less than 5 km from a port with dangerous goods traffic.
- Those that overlap with a coastal water body that does not meet the chemical status (as indicated in the river basin plans).
Once all the elements have been integrated, the index has been calculated using the following formula:
POLLUTION INDEX = 0.1*[monobuoys] + 0.25*[Dregged material dumps + high concentrations of metals or POPs atmospheric depositions + river mouths + MSW landfills + mines] + 0.5* [ports not carrying dangerous goods + urban wastewater discharges] + 0.75*[rivers poor chemical status or tw poor chemical status + industrial discharges] + 1*[cw poor chemical status + ports dangerous goods]
The result is a mesh of probabilities of inputs of loads of dangerous substances that can therefore indicate areas with potential risk of contamination. The selected ranges are:
Very High: 2.75 to 3.5 / High: 1.75 to 2.75 / Medium: 1 to 1.75 / Low: 0.25 to 1 / Very Low: minor 0.25
Resources
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http://remro.cedex.es/WebCepyc/Estrecho/EContaminantesMallado.rar |