50.


Table 8.6 sets out the generic criteria used in defining the sensitivity of the marine water quality receptor. Where a receptor could reasonably be assigned more than one level of sensitivity, professional judgement has been used to determine which level is applicable.


Table 8.6 Criteria used to determine the sensitivity of marine water quality receptors Sensitivity


Definition High


The water quality of the receptor supports or contributes towards the designation or nationally important feature and / or has a very low capacity to accommodate any change to current water quality status, compared to baseline conditions.


Medium Low


The water quality of the receptor supports high biodiversity and / or has low capacity to accommodate change to water quality status.


The water quality of the receptor has a high capacity to accommodate change to water quality status, due, for example, to large relative size of the receiving water and capacity for dilution and flushing. Background concentrations of certain parameters already exist.


Negligible


Specific water quality conditions of the receptor are likely to be able to tolerate proposed change with very little or no impact upon the baseline conditions detectable.


8.4.3.2 Magnitude 51.


Prediction of the magnitude of potential effects has been based on the consequences that the proposed East Anglia THREE project might have upon the marine water quality status (see Table 8.7).


52.


These descriptions of magnitude are specific to the assessment of marine water quality impacts and are considered in addition to the generic descriptors of impact magnitude presented in Chapter 6 EIA Methodology. Potential impacts have been considered in terms of permanent or temporary and adverse or beneficial effects.


53. Where an effect could reasonably be assigned more than one magnitude, professional judgement has been used to determine which rating is applicable.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 8 Marine Water and Sediment Quality Page 18


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