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Papers by David Funke
J Am Water Resour Assoc, 2001
Journal of the American Water Resources Association, 2001
A "synthetic paired basin" technique that combines hydrologic monitoring and watershed modeling p... more A "synthetic paired basin" technique that combines hydrologic monitoring and watershed modeling proves to be a useful tool in detecting hydrologic change in creeks draining basins undergoing urbanization. In this approach, measured stream flow following subbasin treatment (a period of urbanization) is compared with flow from a control subbasin over the same time period. The control subbasin is the pre.treatment subbasin itself as represented by a well-calibrated hydrologic model that is input with poSt-treatment meteorological data. The technique is illustrated for stream monitoring sites at the outlets of two high-resource sub-basins in the Bear Creek basin of King County, Washington. Application of this technique holds promise to provide earlier warning of cumulative, human impacts on aquatic resources and to better inform adaptive watershed management for resource protection.
Environmental Management, 2005
We conducted statistical analyses of a 10year record of stream nutrient and sediment concentratio... more We conducted statistical analyses of a 10year record of stream nutrient and sediment concentrations for 17 streams in the greater Seattle region to de-termine the impact of urban non-point-source pollutants on stream water quality. These catchments are dominated by either urban (22-87%) or forest (6-73%) land cover, with no major nutrient point sources. Stream water phosphorus concentrations were moderately strongly (r 2 = 0.58) correlated with catchment land-cover type, whereas nitrogen concentrations were weakly (r 2 = 0.19) and nonsignificantly (at a < 0.05) correlated with land cover. The most urban streams had, on average, 95% higher total phosphorus (TP) and 122% higher soluble reactive phosphorus (SRP) and 71% higher turbidity than the most forested streams. Nitrate (NO 3 ), ammonium (NH 4 ), and total suspended solids (TSS) concentrations did not vary significantly with land cover. These results suggest that urbanization markedly increased stream phosphorus concentrations and modestly increased nitrogen concentrations. However, nutrient concentrations in Seattle region urban streams are significantly less than those previously reported for agricultural area streams.
J Am Water Resour Assoc, 2001
Journal of the American Water Resources Association, 2001
A "synthetic paired basin" technique that combines hydrologic monitoring and watershed modeling p... more A "synthetic paired basin" technique that combines hydrologic monitoring and watershed modeling proves to be a useful tool in detecting hydrologic change in creeks draining basins undergoing urbanization. In this approach, measured stream flow following subbasin treatment (a period of urbanization) is compared with flow from a control subbasin over the same time period. The control subbasin is the pre.treatment subbasin itself as represented by a well-calibrated hydrologic model that is input with poSt-treatment meteorological data. The technique is illustrated for stream monitoring sites at the outlets of two high-resource sub-basins in the Bear Creek basin of King County, Washington. Application of this technique holds promise to provide earlier warning of cumulative, human impacts on aquatic resources and to better inform adaptive watershed management for resource protection.
Environmental Management, 2005
We conducted statistical analyses of a 10year record of stream nutrient and sediment concentratio... more We conducted statistical analyses of a 10year record of stream nutrient and sediment concentrations for 17 streams in the greater Seattle region to de-termine the impact of urban non-point-source pollutants on stream water quality. These catchments are dominated by either urban (22-87%) or forest (6-73%) land cover, with no major nutrient point sources. Stream water phosphorus concentrations were moderately strongly (r 2 = 0.58) correlated with catchment land-cover type, whereas nitrogen concentrations were weakly (r 2 = 0.19) and nonsignificantly (at a < 0.05) correlated with land cover. The most urban streams had, on average, 95% higher total phosphorus (TP) and 122% higher soluble reactive phosphorus (SRP) and 71% higher turbidity than the most forested streams. Nitrate (NO 3 ), ammonium (NH 4 ), and total suspended solids (TSS) concentrations did not vary significantly with land cover. These results suggest that urbanization markedly increased stream phosphorus concentrations and modestly increased nitrogen concentrations. However, nutrient concentrations in Seattle region urban streams are significantly less than those previously reported for agricultural area streams.