Rohnert Park Nutrient Loading
Project Description: Is Rohnert Park contributing to nutrient loading into the Laguna de Santa Rosa?
- How do levels of ammonia, nitrate, nitrite, TKN, nitrogen, orthophosphate, and phosphorus change in Copeland Creek in different regions (rural, residential, downstream of agricultural runoff, and at the Laguna)?
- How to these levels change over time (September vs. October vs. November)?
- What effect does the first major rainfall of the season have on these levels?
Duration: Spring 2014 - ongoing
Type of Educational Activities: Service-learning
Project Faculty: Jackie Guilford (ENSP), Mark Perri (Chemistry), Mike Cohen (Biology)
Partners/Funding: Sonoma County Water Agency; The Digital/Critical Cohort
- ENSP 450 Sustainable Water Technology and Toxicology - Guilford
- BIOL 340 General Bacteriology - Cohen
- BIOL 338 (Spring) Environmental Microbiology and Biotechnology - Cohen
- Furthest upstream on Laguna: Rural site. Commerce.
- Upstream of Sonoma State campus.
- Sonoma State Campus site
- Laguna de Santa Rosa at Stony Point.
Sampling Schedule - Students sample at all four sites on October 3rd, November 7th, and first flush (the day after the first significant rainfall of the season).
Target Variables and Protocols - The following nutrients will be submitted to a certified laboratory for testing:
- Ammonia as N
- Ammonia as N Unionized
- Nitrate as N
- Nitrite as N
- Nitrogen Total
- Phosphorus Total
- Coliform Bacteria, E.coli (Mike Cohen) - IDEXX Colilert®: Standard methods for the Examination of Water and Wastewater
Quality Assurance and Control (also see data disclaimer) - Students meet with SCWA staff Jeff Church for training and initial sampling on September 5th. All water samples are tested by a certified laboratory.
Data: (see data disclaimer)