presentation dri 2003

WQ Modeling & Monitoring, Periphyton, Fish and Invertebrate Monitoring:DRI’s Multifaceted Ecological Assessment Programs Chris H. Fritsen, Desert Research Institute: 

WQ Modeling & Monitoring, Periphyton, Fish and Invertebrate Monitoring: DRI’s Multifaceted Ecological Assessment Programs Chris H. Fritsen, Desert Research Institute

Slide2: 

Pyramid Lake Lake Tahoe Tahoe City, CA Derby Dam Reno/Sparks, NV Wadsworth, NV Nixon, NV Marble Bluff Dam Truckee River Basin California Nevada Truckee Canal

Slide3: 

Long Valley Creek Derby Dam Enter Dodge Flat S-S Enter Dead Ox Meadows Leave Dead Ox Leave Dodge Flat Enter Pyramid Lake

Slide4: 

Groundwater Contours, Lower Truckee River

A Long-Term Dynamic Modeling Approach to Quantifying Impacts of Subsurface Agricultural NPS Pollutionin the Lower Truckee River, Nevada: 

A Long-Term Dynamic Modeling Approach to Quantifying Impacts of Subsurface Agricultural NPS Pollution in the Lower Truckee River, Nevada Thesis by: Suzanne Kish Department of Environmental Engineering Sciences Advisor: Dr. John J. Warwick

Full Simulation – Upstream Results: 

Full Simulation – Upstream Results NH4 at Segment 15, Painted Rock NO3 at Segment 15, Painted Rock

Full Simulation – Upstream Results: 

DO at Segment 15, Painted Rock OPO4 at Segment 15, Painted Rock Full Simulation – Upstream Results

Biomass Monitoring: 

Biomass Monitoring

Biomass Results: 

Biomass Results Figure 2. Dynamics of chlorophyll a standing stocks on cobble habitats in the lower Truckee River from August 2000 until July 2001.

Slide11: 

Associated activities Nutrient Limitation Study Azolla Study Isotopes (L. Saito-UNR)

Periphyton P to N limitation?: 

Periphyton P to N limitation? Trend is evident (above): But annual events can change the balance (e.g. drought, fire and releases)

Red Strip Observations and Dynamics: 

Red Strip Observations and Dynamics

Truckee River Sediment TMDL DevelopmentGoals: 

Truckee River Sediment TMDL Development Goals Estimate sediment load for TMDL source assessment Characterize sediment variability Develop surrogate for sediment using turbidity Principal Investigator: G. Dana, Desert Research Institute Funding Agency: Lahontan Regional Water Quality Control Board Sampling sites along Truckee River

Slide16: 

Truckee River Sediment TMDL Development Results will be used in conjunction with previous biological studies to determine level of sediment impairment in the Truckee River.

Source Analysis by Compilation of Data: 

Source Analysis by Compilation of Data Developed relationship between Sediment Load and Flow Lub=10B0LogQ(t)B1e2.651s2

Sediment Load Prediction, Normalized by Area: 

Sediment Load Prediction, Normalized by Area

Slide19: 

Fish and Bugs Macroinvertebrate Bioassessments (Sada+NDEP) Stream Fish Abundance & Community Structure (Sada/TNC) McCarran Ranch Restoration Tahoe Basin Stream Fish/Habitat Relationships (Sada/NDOW )

Past and Present DRI Eco-assessment programs : 

Past and Present DRI Eco-assessment programs Interdisciplinary Help Construct Framework for Future Bio-assessment Programs. e.g. Developing Ecological Condition Gradients e.g. Development of IBI’s