SLIDE 1
Funding Sources
- Cooperative Study:
- Tahoe Regional Planning Agency
- U.S. Geological Survey
- In-kind Services - UCD Tahoe
Environmental Research Center (TERC)
- U.S. Forest Service LTMBU
The Lake Tahoe Interagency Monitoring Program Sediment and Nutrient - - PowerPoint PPT Presentation
The Lake Tahoe Interagency Monitoring Program Sediment and Nutrient - - PowerPoint PPT Presentation
The Lake Tahoe Interagency Monitoring Program Sediment and Nutrient Loading and Concentration Data for Ten Indicator Streams Through Water Year 2010 Nancy L. Alvarez U.S. Geological Survey John E. Reuter Patty Arneson UCD, TERC Funding
SLIDE 2
SLIDE 3
Outline
- History
- LTIMP Objectives
- Sampling Sites
- Sampling Design
- Pollutants of Interest
- Methods – UCD Load
and Flow-Weighted Concentration (FWC)
- Results
- Future Work
SLIDE 4
History
- Lake and tributary water quality monitoring
started in the early 1970’s
- LTIMP formed in 1978 to conduct
collaborative monitoring and research efforts
- LTIMP stream monitoring began in October
1979
- Group effort to design monitoring program
- Current program began in October 1988
SLIDE 5
LTIMP Objectives
- Primary purpose to provide long-term
consistent, reliable, and accessible data on tributary water quality and streamflow
- Provide a long-term database for estimation of
sediment and nutrient loads and trends from major tributary streams and minor tributaries of undisturbed basins
Load = Concentration x discharge x conversion factor
SLIDE 6
Sampling Sites
- 10 watersheds
- 47 % of
watershed area
- ~50%
streamflow to lake
SLIDE 7
Sampling Design
- Samples collected
– Monthly – Storm events – Snow-melt runoff
- All phases of
hydrograph sampled
- EWI depth integrated
- Number of samples
each water year varied
SLIDE 8
Upper Truckee R at South Lake Tahoe
5/21/05 12/31/05 12/1/04
SLIDE 9
10 20 30 40 10/1/2004 12/31/2004 4/1/2005 7/1/2005 9/30/2005 Mean Daily Discharge (cfs)
Date
Incline Creek, WY 2005
SLIDE 10
10 20 30 40 10/1/2004 12/31/2004 4/1/2005 7/1/2005 9/30/2005 Mean Daily Discharge (cfs)
Date
Incline Creek, WY 2005
12 routine samples
SLIDE 11
10 20 30 40 10/1/2004 12/31/2004 4/1/2005 7/1/2005 9/30/2005 Mean Daily Discharge (cfs)
Date
Incline Creek, WY 2005
17 event samples
SLIDE 12
Pollutants of Interest
- Nitrogen
- TKN, NH4, NO2+NO3
- TN = TKN + NO2+NO3
- Phosphorus
- TP, SRP
- Suspended Sediment
Concentration-SSC
- Particles less than 20
microns (# particles)
SLIDE 13
Laboratories
- UC Davis Labs in
Davis, CA and Incline Village, NV
- USGS Sediment
Lab
SLIDE 14
Data
- Published in annual data
books
- http://nevada.usgs.gov/
- Published in on-line USGS
database
- http://waterdata.usgs.gov/nwis
SLIDE 15
UCD Load Calculations
- Log of instantaneous load is regressed
against log of instantaneous discharge for each water year
- Regression equation with correction for
retransformation bias used with daily discharge
- Annual load = sum of daily loads for year
- Combined load = sum of annual loads for
10 streams
SLIDE 16
UCD Annual Flow-Weighted Concentration Calculations
- Annual FWC
– Total annual load divided by total annual streamflow
SLIDE 17
Sediment Annual Load
ANNUAL SUSPENDED SEDIMENT LOAD COMBINED FOR 10 STREAMS
WATER YEAR
1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 1
SUSPENDED SEDIMENT LOAD IN TONNES PER YEAR
10000 20000 30000 40000 50000 60000
TOTAL ANNUAL STREAMFLOW IN CUBIC METERS x 105
500 1000 1500 2000 2500 3000 3500 4000 4500
SUSPENDED SEDIMENT LOAD TOTAL ANNUAL STREAMFLOW
ANNUAL PARTICLE LOAD LESS THAN 16 MICRONS COMBINED FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
LOAD OF PARTICLES LESS THAN 16 MICRONS IN PARTICLE NUMBERS PER YEAR
2e+19 4e+19 6e+19 8e+19 1e+20
TOTAL ANNUAL STREAMFLOW IN CUBIC METERS x 105
500 1000 1500 2000 2500 3000 3500 4000 4500
PARTICLE LOAD <16 MICRONS TOTAL ANNUAL STREAMFLOW
SLIDE 18
Phosphorus Annual Load
ANNUAL TOTAL PHOSPHORUS LOAD COMBINED FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
TOTAL PHOSPHORUS LOAD IN KILOGRAMS PER YEAR
10000 20000 30000 40000 50000
TOTAL ANNUAL STREAMFLOW IN CUBIC METERS x 105
500 1000 1500 2000 2500 3000 3500 4000 4500
TOTAL PHOSPHORUS LOAD TOTAL ANNUAL STREAMFLOW
ANNUAL SOLUBLE REACTIVE PHOSPHORUS LOAD COMBINED FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
SOLUBLE REACTIVE PHOSPHORUS LOAD IN KILOGRAMS P PER YEAR
1000 2000 3000 4000
TOTAL ANNUAL STREAMFLOW IN CUBIC METERS x 105
500 1000 1500 2000 2500 3000 3500 4000 4500
SOLUBLE REACTIVE PHOSPHORUS LOAD TOTAL ANNUAL STREAMFLOW
SLIDE 19
Nitrogen Annual Load
ANNUAL TOTAL NITROGEN LOAD COMBINED FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
TOTAL NITROGEN LOAD IN KILOGRAMS PER YEAR
20000 40000 60000 80000 100000 120000 140000 160000
TOTAL ANNUAL STREAMFLOW IN CUBIC METERS x 105
500 1000 1500 2000 2500 3000 3500 4000 4500
TOTAL NITROGEN LOAD TOTAL ANNUAL STREAMFLOW
ANNUAL NITRATE PLUS NITRITE LOAD COMBINED FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
NITRATE PLUS NITRITE LOAD IN KILOGRAMS N PER YEAR
5000 10000 15000 20000 25000
TOTAL ANNUAL STREAMFLOW IN CUBIC METERS x 105
500 1000 1500 2000 2500 3000 3500 4000 4500
NITRATE PLUS NITRITE LOAD TOTAL ANNUAL STREAMFLOW
SLIDE 20
Largest Contributors
Blackwood Creek Upper Truckee River
December 31, 2005 Photo by Scott Hackley January 2, 1997 Photo by Tim Rowe
SLIDE 21
Sediment Annual Flow- Weighted Concentration
PARTICLES LESS THAN 16 MICRONS FLOW-WEIGHTED CONCENTRATION FOR 10 STREAMS
WATER YEAR
1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 1
PARTICLES LESS THAN 16 MICRONS FLOW-WEIGHTED CONCENTRATION IN PARTICLE NUMBERS PER LITER
0.0 5.0e+7 1.0e+8 1.5e+8 2.0e+8 2.5e+8 3.0e+8 5-year moving average
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION FOR 10 STREAMS
WATER YEAR
1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 1
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
20 40 60 80 100 120 140 160 5-year moving average
SLIDE 22
Phosphorus Annual Flow- Weighted Concentration
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION FOR 10 STREAMS
WATER YEAR
1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 1
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.020 0.040 0.060 0.080 0.100 0.120 0.140 5-year moving average
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.010 5-year moving average
SLIDE 23
Nitrogen Annual Flow-Weighted Concentration
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 5-year moving average
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION FOR 10 STREAMS
WATER YEAR
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.010 0.020 0.030 0.040 0.050 0.060 5-year moving average
SLIDE 24
Suspended Sediment Annual FWC
10336698 THIRD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
200 400 600 800 1000 1200 5-year moving average 5-year moving average
10336700 INCLINE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
10336730 GLENBROOK CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
10336740 LOGAN HOUSE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
10336760 EDGEWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
SLIDE 25
Suspended Sediment Annual FWC
10336790 TROUT CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average 5-year moving average
10336610 UPPER TRUCKEE RIVER
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
10336645 GENERAL CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
10336660 BLACKWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
10336676 WARD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SUSPENDED SEDIMENT FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
100 200 300 400 500 600 5-year moving average
SLIDE 26
Total Phosphorus Annual FWC
10336698 THIRD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336700 INCLINE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336730 GLENBROOK CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336740 LOGAN HOUSE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336760 EDGEWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
SLIDE 27
Total Phosphorus Annual FWC
10336790 TROUT CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336610 UPPER TRUCKEE RIVER
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336645 GENERAL CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336660 BLACKWOOD
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
10336676 WARD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.000 0.100 0.200 0.300 0.400 5-year moving average
SLIDE 28
SRP Annual FWC
10336698 THIRD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average 5-year moving average
10336700 INCLINE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
10336730 GLENBROOK CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
10336740 LOGAN HOUSE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
10336760 EDGEWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
SLIDE 29
SRP Annual FWC
10336790 TROUT CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average 5-year moving average
10336610 UPPER TRUCKEE RIVER
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
10336645 GENERAL CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
10336660 BLACKWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
10336676 WARD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
SOLUBLE REACTIVE PHOSPHORUS FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS P
0.000 0.005 0.010 0.015 0.020 0.025 5-year moving average
SLIDE 30
Total Nitrogen Annual FWC
10336698 THIRD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336700 INCLINE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336740 LOGAN HOUSE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336760 EDGEWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336730 GLENBROOK CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
SLIDE 31
Total Nitrogen Annual FWC
10336790 TROUT CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336610 UPPER TRUCKEE RIVER
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336645 GENERAL CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336660 BLACKWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
10336676 WARD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
TOTAL NITROGEN FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER
0.00 0.20 0.40 0.60 0.80 1.00 5-year moving average
SLIDE 32
Nitrate+Nitrite Annual FWC
10336698 THIRD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average 5-year moving average
10336700 INCLINE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
10336730 GLENBROOK CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
10336740 LOGAN HOUSE CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
10336760 EDGEWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
SLIDE 33
Nitrate+Nitrite Annual FWC
10336790 TROUT CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average 5-year moving average
10336610 UPPER TRUCKEE RIVER
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
10336645 GENERAL CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
10336660 BLACKWOOD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
10336676 WARD CREEK
WATER YEAR
1980 1985 1990 1995 2000 2005 2010
NITRATE PLUS NITRITE FLOW-WEIGHTED CONCENTRATION IN MILLIGRAMS PER LITER AS N
0.000 0.050 0.100 0.150 0.200 5-year moving average
SLIDE 34
West Shore Streams
Ward Creek 12-31-05 General Creek 12-31-05
Photos by Scott Hackley Photo by Tim Rowe
Blackwood Creek 3-12-03
SLIDE 35
Future Work
- Continue to work on statistical methods for
loads, FWC and trends
- Tributary monitoring has “new” objectives
- Starting WY12 monitoring 7 streams for
water quality at 7 near mouth sites
- Starting WY12 monitoring 9 streams for
streamflow with 11 gages
SLIDE 36
Questions
Trout at Pioneer Trail Third Creek
June 29, 2011 June 6, 2010
SLIDE 37
“New” Goal Objectives
- Goal: Tributary monitoring program will
collect, analyze and report long-term, consistent, reliable and accessible data on pertinent tributary water quality parameters and streamflow
- Objectives for data collection, data access,
data evaluation, program administration.
SLIDE 38
“New” Goals/Objectives
- Data Collection-
– TMDL progress – Nearshore conditions – Support State/TRPA water quality standards – Streamflow for restoration projects – Streamflow for flood forecasting and extreme hydrologic events
SLIDE 39
“New” Goals and Objectives
- Data Access: Provide access to the data
- Data Evaluation:
– Evaluate annual pollutant concentrations and loads relative to adopted water quality standards and objectives. – Evaluate changes in streamflow (peak, timing, volumes)
SLIDE 40
“New” Goals and Objectives
- Program Administration objectives-
– Follow Tahoe Status and Trend Monitoring Evaluation Program – Develop and flow a monitoring and evaluation plan – Annual Findings Report
SLIDE 41
WY2012 Stream Network
- 11 gages
- 9 watersheds
- 47 % of
watershed area
- ~50%
streamflow to lake
SLIDE 42
WY2012 Stream Network
- 7 QW sites
- 7 watersheds
- 47 % of
watershed area
- ~50%
streamflow to lake
SLIDE 43