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Pacific Southwest Research Station

 

Pacific Southwest Research Station
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West Annex Building
Albany, CA 94710-0011

(510) 559-6300

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Measuring the Ability of Floodplains to Treat Urban Runoff

Full title: Measuring the ability of floodplains to treat urban runoff in the Lake Tahoe basin

Lead Researchers: Geoffrey Schladow, Tahoe Environmental Research Center, University of California at Davis; Stefan Wuertz, Department of Engineering, University of California at Davis

Proposal

Progress Report (October 1, 2010 December 31, 2010) available for download.

Annual Accomplishments Report (October 1, 2009 September 30, 2010) available for download

Abstract

The project seeks to measure the mechanisms and the efficiency of fine particle removal from urban stormwater using floodplains. The project is based in the Cold Creek/Trout Creek floodplain, and utilizes the Cattlemans detention basin and the floodplain immediately downstream of it. Experiments separating the role of biofilm processes and gravitational settling will be conducted within the detention basin, and on the floodplain downstream of the basin in response to both natural overflows of the basin and pumped flows of urban stormwater. The goals of the project are to (1) quantify the effects of gravitational settling and biofilm processes in the removal of very fine (<20 micron) particles from urban stormwater and to (2) determine the elemental composition of both the stormwater itself and the particulate material to assess the potential for negative impacts to the resident floodplain biota and their food webs. This information will be used to help calibrate and validate a two-dimensional floodplain model that will enable floodplains to be designed to optimally treat urban stormwater.

Expected date of final products: June 2011.

Schedule of milestones and deliverables

The project is expected to start in July 2009 and is scheduled to continue until June 2011.

Del # Task # Deliverable/Task Start Date End Date
1 Establish and manage grant agreement Apr 2009 Jun 2009
a Establish agreement between PSW and UC Davis
b Quarterly progress reports and invoicing
2 Design Development/Refinement Jul 2009 Aug 2009
a Start-up meeting
b Workplan finalization
3 Outreach/training Aug 2009 Jun 2011
a Conduct workshops for agency representatives
4 Inventory/assessment/monitoring of water quality Oct 2009 Jun 2011
a Install & operate monitoring equipment
b Particle size analysis: Collect in situ data for fine particle removal by floodplain processes
c Biofilm analysis: Collect in situ data for fine particle (< 20 micron) removal efficiency for gravitational settling and for biofilm processes for urban stormwater
d Continuous data analysis: operate the sample collection and monitoring system to provide data for rain on snow events, spring snowmelt conditions, rain events and artificial pumping events
e ICP-MS analysis: analyze elemental composition of fine particles and urban stormwater and potential for food web risks
5 Final Products Jul 2011 Sep 2011
a Model calibration and validation: the results of the project will be used to help P refine a floodplain model that is being separately developed
b Draft manuscripts: 1. Report describing in situ data for fine particle (&lt; 20 micron) P removal efficiency for gravitational settling and for biofilm processes for urban stormwater; 2. Report describing in situ data for fine particle removal by floodplain processes; 3. Report describing elemental composition of fine particles and urban stormwater and potential for food web risks
c Prepare final reports, including design parameters for using floodplains to treat urban stormwater
Last Modified: Mar 28, 2013 02:52:07 PM