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Pre- and post-remediation data sets are used herein to assess the effectiveness of remedial measures implemented in the headwaters of the Mineral Creek watershed, where contamination from hard rock mining has led to elevated metal concentrations and acidic pH. Collection of pre- and post-remediation data sets generally followed the synoptic mass balance approach, in which numerous stream and inflow locations are sampled for the constituents of interest and estimates of streamflow are determined by tracer dilution. The comparison of pre- and post-remediation data sets is confounded by hydrologic effects and the effects of temporal variation. Hydrologic effects arise due to the relatively wet conditions that preceded...
The suspended sediment load carried by rivers is highly variable in space and time. On a given river, the suspended sediment load is generally related to the discharge. However, at any given discharge on a specific river the suspended sediment load can vary by a couple of orders of magnitude. The temporal variations can be due to many factors including: varying water sources through a season (i.e., rain versus snowmelt), variability in the amount of easily mobilized sediment stored in the channel, changing channel morphology due to intermittent events or changing climate, and variations in erosional processes supplying sediment to the river. Many studies have looked at the causes of the temporal variability in suspended...
Pre- and post-remediation data sets are used herein to assess the effectiveness of remedial measures implemented in the headwaters of the Mineral Creek watershed, where contamination from hard rock mining has led to elevated metal concentrations and acidic pH. Collection of pre- and post-remediation data sets generally followed the synoptic mass balance approach, in which numerous stream and inflow locations are sampled for the constituents of interest and estimates of streamflow are determined by tracer dilution. The comparison of pre- and post-remediation data sets is confounded by hydrologic effects and the effects of temporal variation. Hydrologic effects arise due to the relatively wet conditions that preceded...