Ander, L.

Bearcock, J.

Cave, M.

Everett, P.

Flight, D.

Fordyce, F.

Green, K.

Johnson, C.

Knights, K.

Lark, M.

Lister, T.R.

Nice, S.

Scheib, A.

Scheib, C.

English

NERC Open Research Archive

London Earth: the chemistry of the surface       environment in the UK’s most populous cityS h ib C* Fli ht D Li t T R Ni S S h ib A F d F E ttc e , ., g , ., s er, . ., ce, ., c e , ., or yce, ., vere , P., Knights, K., Green, K., Johnson, C, Cave, M, Bearcock, J, Ander, L and Lark, M.All l b t t ff d t d t l t ! a ora ory s a  an  s u en  vo un eers© NERC All rights reservedGeochemical Baseline Survey of the Environment (G-BASE)What is London Earth?Unique, comprehensive, systematic survey of soil chemistry across entire Greater London Authority area      Vital statistics!!• 6288 sites visited   • 18,800 samples collected and archived • Almost 10 tonnes of soil    • 5 person years of sampling effort• 400 000 individual measurements,   • Completed in 3 years.....b hi i l h b i i© NERC All rights reserved www.bgs.ac.uk/gbase• ut t s s on y t e eg nn ng© NERC All rights reserved www.bgs.ac.uk/gbaseUrban soil pressures…London Earth survey• Environmental science resource base   • London-wide benchmark• Natural baseline; geology• Man’s impact on our Capital city• Robust, UK-wide survey; inter-city or urban-© NERC All rights reserved www.bgs.ac.uk/gbaserural comparisons can be made© NERC All rights reserved www.bgs.ac.uk/gbaseObserved man-made material in soil(Sample contamination)5000350040004500es200025003000er of occurence50010001500Numbe0Contamination type© NERC All rights reserved www.bgs.ac.uk/gbaseObserved man-made material; by land-use© NERC All rights reserved www.bgs.ac.uk/gbase© NERC All rights reserved www.bgs.ac.uk/gbase© NERC All rights reserved www.bgs.ac.uk/gbase© NERC All rights reserved www.bgs.ac.uk/gbase© NERC All rights reserved www.bgs.ac.uk/gbaseParklands – indicators of undisturbed soil?© NERC All rights reserved www.bgs.ac.uk/gbase© NERC All rights reserved www.bgs.ac.uk/gbaseSignificant differences between land-use; Industrial land has the highest meanUK city inter-comparison; arsenicTypical concentrations within range of other UK cities       Some of the higher measurements may exceed guideline values© NERC All rights reserved www.bgs.ac.uk/gbase• Centrally located highs, likely to relate to legacy of leaded fuel© NERC All rights reserved www.bgs.ac.uk/gbase• Other sources likely to be locally important (e.g. leaded paint)• ~ 5 times higher typically than local rural samples (n= 1900)UK city inter-comparisonLead concentrations © NERC All rights reserved www.bgs.ac.uk/gbaseWork in progress & Planned• Pilot studies• Choose 100 sites to measure bioaccessibilty (How available the metals and metalloids are to be absorbed by the© NERC All rights reserved www.bgs.ac.uk/gbase           body)To be done by the BGS Medical Geology TeamAccessibility• All data available from 13/05/2011 via a licence• Topsoil (5 -20 cm), >50 elements XRF, pH, LOI• Maps and descriptions for 10 elements available as free downloads on BGS website• Web-based easy-access viewer in development (feedback)• http://www.bgs.ac.uk/gbase/londonearth.html• enquiries@bgs.ac.uk© NERC All rights reserved www.bgs.ac.uk/gbaseBGS Information Products© NERC All rights reserved www.bgs.ac.uk/gbaseAcknowledgements• Thank you to all individuals and organisations that helped during the     sampling phase of the project• Without you it would not have been       possible!• Our student volunteers!Thank you!© NERC All rights reserved www.bgs.ac.uk/gbase

London Earth : the chemistry of the surface environment in the UK's most populous city

http://nora.nerc.ac.uk/15984/1/FTLE_Seminar_CScheib.pdf

London Earth : the chemistry of the surface environment in the UK's most populous city

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