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Overview
Basics
Basics
This study investigated the contribution of winter time road management practices such as abrasive sand application and snow plowing to fine sediment particles in roadway runoff that enters directly or indirectly into Lake Tahoe. Reliable information regarding source apportionment of fine sediment particles is required to advance source control best management practice (BMP) to reduce loadings of fine sediment particles and associated phosphorus in winter time roadway runoff to improve Lake Tahoe water column clarity.
Completed
2010
2011
2017
$283,251
Kat McIntyre (KMcIntyre@trpa.gov)
10/27/2017
10/27/2017
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| Location Information | Location Notes |
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Organizations
EIP Details
EIP Basics
EIP Basics
04.01.01.0097 - P072: Sources of Fine Sediment Particles in urban roadway runoff in the LTB
Performance Measures
Expected Performance Measures
Expected Performance Measures
No expected performance measures set for this project.
Reported Performance Measures
Reported Performance Measures
No annual performance measure accomplishments entered for this project.
Funding
Expected Funding
Expected Funding
$283,251
$283,251
$0
| Total | |||
|---|---|---|---|
| Southern Nevada Public Land Management Act (Pacific Southwest Research Station) (USFS - PSW) | $283,251 | $283,251 | $0 |
| Grand Total | $283,251 | $283,251 | $0 |
Reported Expenditures
Reported Expenditures
| Total | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | |
|---|---|---|---|---|---|---|---|---|---|
| Southern Nevada Public Land Management Act (Pacifi... | $283,251 | $35,407 | $35,407 | $35,407 | $35,406 | $35,406 | $35,406 | $35,406 | $35,406 |
| Grand Total | $283,251 | $35,407 | $35,407 | $35,407 | $35,406 | $35,406 | $35,406 | $35,406 | $35,406 |
Photos
Other Details
Watersheds
No watersheds set for this project.
Threshold Categories
-
More than 50% of Lake Tahoe’s clarity loss can be attributed to fine sediment particles (< 16 µm) that are generated by various sources, including anthropogenic sources such as traction sands and pavements.
Local and Regional Plans
No Local and Regional Plans set for this project.
Related Projects
Related Projects
No Related Projects set for this project.
External Links
No external links entered.
Notes
Notes
| 08/28/2017 10:01 PM | Kiara Cuerpo-Hadsall | Objectives: This proposed study will evaluate the effectiveness of alternative abrasives, road sweeping and vacuuming, and the use of snow plows with rubber blades to serve as BMP strategies to reduce the generation and transport of fine sediment particles and associated phosphorus. This study will also address questions about how the two most commonly used sampling techniques (grab sampling and automated mechanical sampling) are different in collecting sediment particles and how these techniques affect measurements of some parameters such as particle numbers, mass, and turbidity. The specific objectives are: • Evaluate the usefulness of alternative abrasive as a source control BMP to reduce the loadings of fine sediment particles and associated phosphorus. • Evaluate the effectiveness of sweeping and vacuuming in removal of fine sediment particles from roads. • Evaluate the effectiveness of snow plowing with rubber blades in diminishing the generation of fine sediment particles from road wear. • Investigate time series changes of fine sediment particle concentrations within each runoff event to determine whether entire roadway runoff needs to be treated or only a certain portion of runoff can be treated. • Identify source profiles of fine sediment particles and phosphorus and characterize their loadings in urban roadway runoff in terms of particle numbers, mass and turbidity. |
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| 08/28/2017 10:01 PM | Kiara Cuerpo-Hadsall | Findings: • Turbidity of wintertime highway stormwater runoff exceeded the stormwater effluent limit (200 NTU) for discharge to infiltration system in the first flush of all collected events. • Turbidity of wintertime highway stormwater runoff exceeded the stormwater effluent limit (20 NTU) for direct discharge to surface waters throughout the entire storm period of all collected events. • The peaks of turbidity were higher than 1000 NTU and declined exponentially from the peak. • Road sweeping reduced turbidity of highway stormwater runoff significantly. • Effects of vacuuming were not tested because a road dust vacuuming cleaner was not available. • Wear of asphalt pavement materials accounted for up to 25-30% of fine sediment. However, it is not clear what fraction of it can be attributed to snow plow and snow chains. • Contribution of abrasive sand was below 10% in all collected events. |
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| 08/28/2017 9:59 PM | Kiara Cuerpo-Hadsall | Management Implications: • Approximately 50% of highway stormwater doesn’t need to be treated before being discharged to infiltration systems. Proprietary BMPs can target only the first 50% of stormwater runoff, and the second 50% can be detoured to reduce size of proprietary BMPs. • Winter time pavement management practices need to be improved to reduce the wear of asphalt pavement materials. • Snow plowing practices and/or snow chain utilization should be better managed to reduce wear of asphalt pavement materials. |
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| 08/28/2017 9:59 PM | Kiara Cuerpo-Hadsall | Publications: www.fs.fed.us/PSW/partnerships/tahoescience |