Climate Resilience Dashboard
EIP Project Tracker
Lake Clarity Tracker
Monitoring Dashboard
Parcel Tracker
Threshold Dashboard
Transportation Tracker
Overview
Basics
Basics
Lake Tahoe, an oligotrophic lake appreciated for its fresh water and geographic setting, has been reported of its declining water clarity over the past few decades due to nutrient and sediment particle inputs. Contributions from atmospheric deposition of particulate matter (PM) have been suggested to be substantial, yet inadequately quantified. This study established three long-term monitoring sites (July 2013 – August 2014) to measure 24-hr, size-resolved dry and wet PM deposition in near-shore, offshore-background, and upper watershed conditions in the Lake Tahoe Basin.
Completed
2011
2012
2014
$252,895
Alan Heyvaert (alan.heyvaert@dri.edu)
10/31/2017
10/31/2017
|
To zoom, hold down the Shift key and drag a rectangle.
|
|
| Location Information | Location Notes |
|---|---|
Organizations
EIP Details
EIP Basics
EIP Basics
04.01.01.0126 - P094: Refining Estimates of Atmospheric Deposition for Sediment Particles and Particulate Nutrients in the Lake Tahoe Basin
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
$252,895
$252,895
$0
| Total | |||
|---|---|---|---|
| Southern Nevada Public Land Management Act (Pacific Southwest Research Station) (USFS - PSW) | $252,895 | $252,895 | $0 |
| Grand Total | $252,895 | $252,895 | $0 |
Reported Expenditures
Reported Expenditures
| Total | 2014 | 2013 | 2012 | 2011 | |
|---|---|---|---|---|---|
| Southern Nevada Public Land Management Act (Pacifi... | $252,895 | $63,224 | $63,224 | $63,224 | $63,223 |
| Grand Total | $252,895 | $63,224 | $63,224 | $63,224 | $63,223 |
Photos
Other Details
Watersheds
No watersheds set for this project.
Threshold Categories
-
Improvement of the estimates of atmospheric deposition.
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
| 07/15/2017 9:50 AM | Kiara Cuerpo-Hadsall | Match Funding: $237,128 | ||
| 07/15/2017 9:49 AM | Kiara Cuerpo-Hadsall | Objectives: Contributions to Lake Tahoe from atmospheric deposition of particulate matter (PM) have been suggested to be substantial, yet inadequately quantified. This study established three long-term monitoring sites (July 2013 – August 2014) to measure 24-hr, size-resolved dry and wet PM deposition in near-shore, offshore-background, and upper watershed conditions in the Lake Tahoe Basin. The objectives were to: • Investigate spatiotemporal variations of PM deposition flux • Obtain dry deposition velocity using mass deposition flux and PM concentration measurements • Provide estimated annual number and mass deposition flux (NDF and MDF, respectively) via dry and wet processes. |
||
| 07/15/2017 9:48 AM | Kiara Cuerpo-Hadsall | Findings: • The seasonal and annual NDFdry flux (annual Number Dry Flux) at the three monitoring sites showed log-normal size distributions where particles of 0.5–1µm and 4-10µm diameter were the most abundant among five size bins (0.5 – 1 µm, 1 – 2.5 µm, 2.5 – 4 µm, 4 – 10 µm, 10 – 20 µm, 20 – 32 µm, and 32 – 64 µm). • For the size range of 0.5 – 20 µm, all seasonal NDFwet exceed NDFdry though its size distribution is more skewed towards fine particles < 2.5 µm which contribute little to the particle mass. • Dry deposition velocity appears to increase rapidly with particle size, while wet deposition velocity is more uniform across all size ranges. *** See www.fs.fed.us/PSW/partnerships/tahoescience for additional findings. |
||
| 07/13/2017 7:38 AM | Kiara Cuerpo-Hadsall | Management Implications: This study proves passive particle collection using an automated sampler, coupled with microscopic counting of individual particles, to be efficient for quantifying daily, size-resolved particle deposition fluxes. NDFdry by this approach was verified with results of a larger-footprint eddy correlation method through a two-week collocated campaign. Moreover, the passive samples allowed analysis using a computer controlled SEM (CCSEM) technique to yield elemental composition of single particles, based on which particles could be classified. It was found that 74 – 87% of coarse and large particles > 4 µm diameter are mineral dust. Sulfur-contained and phosphorus-contained particles, though minor, were found at all three sites, suggesting an appreciable loading of pollutant and nutrient into the lake through atmospheric deposition. |