Hello folks,
I wanted to introduce myself. My hope is that I will be able to provide
some solutions to monitoring storm water runoff. I am currently working
with municipalities and a non-profit group to develop automated sampling
solutions for measuring contaminates entering San Francisco bay,
specifically PCBs and metals. We have had good success in the previous
studies using suspended sediment transport as a surrogate for contaminates
that are adsorbed to sediment particles. The method that we have developed
is called Turbidity Threshold Sampling and it works by measuring turbidity
in real time and using an automated sampler to collect discrete samples at
predefined thresholds. The algorithm has been used to successfully
monitoring suspended loads in alluvial channels for over a decade. This
method provides accurate estimates of suspended sediment loads while
collecting a limited number of physical samples. In addition to turbidity,
other constituents such as conductivity, DO, pH, could be used to drive
sampling as long as the behavior of the constituent is understood. I look
forward to future discussions.

Rand

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Rand Eads
RiverMetrics LLC
PO Box 507
Lafayette, OR 97127
503.435.7516
www.rivermetrics.com


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