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Fig. 5. Mean stream water and near-stream groundwater phosphorus concentrations ± 1 standard deviation. Phosphorus concentration values are based on annual average (December 2000 through December 2001; n = 12). Shown are: (a) mean stream water soluble reactive phosphorus (SRP), (b) mean stream water total phosphorus (TP), (c) mean beneath-stream groundwater SRP, and (d) mean beneath-stream groundwater TP. Solid circles indicate urban sites, whereas open circles indicate nonurban sites. Error bars are standard error from the mean. Solid horizontal lines indicate mean concentrations of all urban sites, whereas dotted horizontal lines indicate mean concentrations of all nonurban sites.
