Discussion: Spatial Distribution
The attachment shows two sets of histograms, showing nitrate and total organic carbon (TOC) concentrations in each groundwater block of the London Basin region.
(a) I would like to know the spatial distribution of elevated nitrate levels in groundwater. What factors might explain this distribution?
(b) What is the spatial distribution of elevated TOC levels in groundwater? What factors might explain this distribution?
(c) The Chalk aquifer and the Middle Thames Gravels are both exploited in the London Basin block. Why do they show differences in chemistry and in contamination?
Attachment:- chart.rar