U.S. Geological Survey Open-File Report 2006-1169
Figure 12b: Profiles of concentrations of phosphorus species (phosphate [PO43-] and total dissolved phosphorus [TDP]) in ground water for samples collected from piezometers (see Figure 3 for locations). Profiles are plotted in order from northernmost (left) to southernmost (right). Click on image for larger version of the figure.