Assessment of the Automation Algorithm for TDR Bridge - Ohio ...
Assessment of the Automation Algorithm for TDR Bridge - Ohio ...
Assessment of the Automation Algorithm for TDR Bridge - Ohio ...
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<strong>TDR</strong> measurements <strong>of</strong> scour <strong>for</strong> different<br />
sediments (based on electric conductivity)<br />
Normalized <strong>TDR</strong> measured thickness <strong>of</strong> sediment layer<br />
1.2<br />
1.0<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0.0<br />
-0.2<br />
Fine sand in tap water<br />
Fine sand in 250ppm NaCl solution<br />
Fine sand in 500ppm NaCl solution<br />
Fine sand in 750ppm NaCl solution<br />
Coarse sand in 500ppm NaCl solution<br />
Gravel in tap water<br />
Gravel in 500ppm NaCl solution<br />
Washed coarse sand in 500ppm NaCl solution +5% error<br />
Washed gravel in 500ppm NaCl solution<br />
Coarse sand and gravel mixture in 500ppm NaCl solution<br />
-5% error<br />
0.0 0.2 0.4 0.6 0.8 1.0<br />
Normalized physically measured thickness <strong>of</strong> sediment layer<br />
<strong>TDR</strong> measurements (electric conductivity) versus physical<br />
measurements (cm ruler) <strong>of</strong> thickness <strong>of</strong> sediment layer <strong>for</strong> all<br />
sediments.<br />
60
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