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Overview
Basics
Basics
The purpose of this project is to expand on the remote sensing research in the near-shore of Lake Tahoe in
order to investigate methods to quantify and map the distribution of 1) suspended fine sediments, 2) chlorophyll, and 3) CDOM in the water column, and map the bottom-type and bottom characteristics of the near-shore to quantify the spatial extent of 4) periphyton, 5) aquatic plants (macrophytes), 6) invasive clam beds, 7) substrate of different sediment classes.
Completed
2010
2011
2013
$146,437
Kat McIntyre (KMcIntyre@trpa.gov)
10/27/2017
10/27/2017
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| Location Information | Location Notes |
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Organizations
Organizations
EIP Details
EIP Basics
EIP Basics
04.01.01.0099 - P080: Remote Sensing of Lake Tahoe’s Near Shore Environment
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
$146,437
$146,437
$0
| Total | |||
|---|---|---|---|
| Southern Nevada Public Land Management Act (Pacific Southwest Research Station) (USFS - PSW) | $146,437 | $146,437 | $0 |
| Grand Total | $146,437 | $146,437 | $0 |
Reported Expenditures
Reported Expenditures
| Total | 2013 | 2012 | 2011 | 2010 | |
|---|---|---|---|---|---|
| Southern Nevada Public Land Management Act (Pacifi... | $146,437 | $36,609 | $36,610 | $36,609 | $36,609 |
| Grand Total | $146,437 | $36,609 | $36,610 | $36,609 | $36,609 |
Photos
Other Details
Watersheds
No watersheds set for this project.
Threshold Categories
-
Accurately measuring and monitoring the status and trends of environmental indicators in the Lake Tahoe Basin is a critical management need.
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
| 08/14/2017 4:15 PM | Kiara Cuerpo-Hadsall | Objectives: The goal of this research was to investigate the extent to which remotely sensed data could be used to retrieve fine particles, chlorophyll, and colored dissolved organic matter (CDOM) concentrations from the water column in the near shore, and to map the distribution of periphyton (attached algae), aquatic macrophytes (submerged plants), and clam beds in the near shore of Lake Tahoe. |
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| 08/14/2017 4:14 PM | Kiara Cuerpo-Hadsall | Findings: • An algorithm for deriving fine sediment, chlorophyll, and CDOM concentration in the water column in the near shore water regions using remote sensing imagery, proved to be very difficult. Absorption analyses showed that the values of optically significant components are extremely low relative to the values found in other inland water bodies, and the available instruments (US Geological Survey, Sacramento) frequently had issues with samples below their levels. • Algorithms for underwater substrate detection were developed but their application proved to be difficult due to influence (and lack of resolution) of water-borne constituents above the bottom surface as discussed previously, even though the lake water is very clear. Discrimination between sand and macrophyte would be feasible until the bottom depth reaches approximately 10 m. Detection of rocks from sand would also be feasible in a similar depth range. • Clam beds usually exhibit a patchy distribution in sand, and hence the possibility of separation would be low due to the similarity in spectral shape between sand and clam beds, and site to site variability of spectra within these substrate types. • Separation of rocks from macrophyte would also be feasible. In general, with present technology, it appears that only larger patches of macrophytes are sufficiently distinguishable from remotely sensed datasets. It will require higher sensitivity and high spectral resolution data (e.g., hyperspectral airborne sensor, PRISM by NASA-JPL) for other substrate types to be distinguishable. |
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| 08/14/2017 4:13 PM | Kiara Cuerpo-Hadsall | Management Implications: • Estimation of the concentrations of optically significant components in water of the lake proved to be difficult due to low concentration and low variability. CDOM, non-algal suspended solid, and algal particle all showed extremely low level of absorption relative to other natural water bodies. CDOM was almost at detection limit of the instrument and could not be quantified reliably. Also, spatial variability was quite low among our samples, in that statistical model development was not feasible. • The development of a cost-benefit analysis for using remote sensing for nearshore monitoring is not meaningful at the present time. The lack of adequate discrimination of different bottom types with current remote sensing products and the noise inherent in the in-water constituent concentrations means that the full suite of benefits are not presently available. |
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| 08/14/2017 4:13 PM | Kiara Cuerpo-Hadsall | Publications: www.fs.fed.us/PSW/partnerships/tahoescience Shohei Watanabe1,2, Erin L. Hestir, Susan L. Ustin, S. Geoffrey Schladow, Remote Sensing of Lake Tahoe's Near Shore Environment. |