In this study, we assess the suitability of ERT for UK sand and gravel deposit assessment. To this end, we
have reviewed the characteristics of deposits in terms of geological setting, thickness and heterogeneity to
inform our survey design strategy. We have collated existing data on the electrical properties of UK sand
and gravel, reviewed previous examples of ERT sand and gravel surveys, and undertaken detailed
geophysical studies at seven potential or active sand and gravel extraction locations in East Anglia and the
East Midlands
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