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- Nearshore Turbidity (Stream Influence)
- Littoral Turbidity Stream
- Outcome
- Program
- Nephlometric Turbidity Unit (NTU)
- WQ3: Attain turbidity values not to exceed three NTU.
- The compliance indicator for this threshold is a measurement of turbidity, calibrated in NTUs.
- This Indicator is reported in the following LT Info areas:
Annual average clarity in NTU as measured at the 10 UC-Davis TERC nearshore network stations. Years in which no data are reported reflect sensor downtime for a significant portion of the year. Estimates are preliminary and require additional QA/QC to account for bias introduced by animals, biofouling, and other factors. Two standards exist for nearshore clarity: less than one NTU for areas not directly influenced by stream discharge and less than three NTU for areas directly influenced by stream discharge.
| Name | Options |
|---|---|
| Littoral Turbidity - Stream Zone |
General
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Program Nearshore Turbidity Monitoring
Approach
A pilot monitoring program of nearshore turbidity began with the first circuit completed in November 2014, followed by similar nearshore circuits completed in April, June, August and November 2015. Measurements were made at a depth of seven meters. Routine boat operating speeds are typically around 10 kilometers per hour in the nearshore areas (Heyvaert et al., 2016). Beginning 1991, nearshore turbidity was measured offshore at the 25-meter depth contour for several locations, including 1) mouth of Upper Truckee River and Trout Creek; 2) El Dorado Beach; 3) mouth of Edgewood Creek; 4) Nevada Beach; 5) mouth of Incline Creek; 6) Burnt Cedar Beach; 7) mouth of Ward Creek; 8) Tahoe State Recreation Area; and 9) the mouth of Blackwood Creek. More recently, nearshore clarity has been measured at approximately the seven-meter contour following a continuous circuit around the lakeshore. This strategy is considered more representative of littoral conditions where people interact with the lake
Partners
Associated Programs data not provided.