A Collaborative Effort to Evaluate Water Resources in

A Collaborative Effort to Evaluate Water Resources in

A Collaborative Effort to Evaluate Water Resources in the Lower Siuslaw Watershed Suzanne Moellendorf, GSI Water Solutions, Inc. Mike Miller, City of Florence Dennis Nelson, GSI Water Solutions, Inc. Dave Livesay, GSI Water Solutions, Inc. Siuslaw Estuary Partnership (SEP) Interdisciplinary team of 19 local, state, and federal agencies Objectives: Protect water quality and quantity Protect and restore wetlands and riparian areas Protect and restore key estuary wetlands Plan for ecological growth Use collaboration and scientific investigation Foster public education and stewardship 3-Year project funded by project partners and EPA

Why form the SEP? Unique features of the Lower Siuslaw watershed North Florence Sole- Source Dunal Aquifer Designated a sole source aquifer by EPA Only sole source aquifer in Oregon Rapid infiltration rates Shallow water table Hydrologic connection Study Area Map. (Project Overview 2010) Why form the SEP?

Water Contamination Concern 4.5 Surface activity Example: Dunes City 4.0 Range of MDDs within UGB 3.5 MDD within UGB Management and Planning Needs Current and future drinking water sources

MDD (mgd) 3.0 2.5 2.0 MDD within City Limits 1.5 1.0 0.5 0.0 2010 Lack of water quality and quantity data (excluding the municipal well field) Range of MDDs within City Limits

2012 2014 2016 2018 2020 2022 2024 2026 2028 Projected Maximum Day Demands for the City of Florence City Limits and UGB (City of Florence

Water Management and Conservation Plan 2010). 2030 SEPs Water Quality & Quantity Monitoring Program SAMPLING Well sites chosen by zoning Commercial & industrial Hwy 101 corridor Residential Sewer Residential Septic Stream sites chosen to evaluate water as it

progresses downstream SEPs Water Quality & Quantity Monitoring Program SAMPLING In-situ Water Temperature pH Conductivity Dissolved Oxygen Oxidation Reduction Potential (GW) Turbidity (SW) Static water level (GW) Stream Discharge (SW) Lab Total coliform/E. coli Total Phosphates Nitrate

Alkalinity Total Organic Carbon Common Ions Zinc & Copper (SW) Lead (SW) VOCs IOCs *SW=Surface water only *GW=Groundwater only Glyphosate/2,4-D Caffeine SEPs Water Quality & Quantity Monitoring Program SAMPLING Sampling Frequency October 2010-November 2012, Monthly & Storm Events Staff Training Provided by DEQ, OWRD,

Confederated Tribes of Coos, Lower Umpqua & Siuslaw Indians, and GSI Data Management For stream data: DEQ Volunteer Monitoring Program Technical support QA/QC support and verification Data accessible to the public PRELIMINARY RESULTS: Groundwater Depth to Water Table PRELIMINARY RESULTS: Groundwater Water Table Elevation Contours (feet above

sea level) Contours vary from 20-100 ft in 20 ft intervals Individual #s at well site = water table elevation at site Red arrows show approximate groundwater flow direction Contours and directions will likely change seasonally PRELIMINARY RESULTS: Groundwater: Summary of Lab Results Parameter Date Result Nitrates Caffeine 10/18/2010 11/22/2010

2/28 & 3/1 2011 2/28/2011 11/22/2010 Detected in 1 Well* (B-2) Not Detected Detected in 1 Well (B-3) Detected in 1 Well (B-2) 1/6 & 1/7 2011 2/1 & 2/2 2011 E. coli 2/28properly & 3/1 on 10/18/10. *Well B-2 did not pump

Not Detected 2011 4/4 & 4/5 2011 5/2 & 5/3 2011 PRELIMINARY RESULTS: Surface water Temperature Summary of Surface Water Lab Results: E.coli: Detections below level of concern Streamflow in Munsel Creek How to Use the Information To develop sustainable water management practices What is Sustainable?

Amount of water that goes out = Amount of water that goes in Contamination is not exacerbated To address any sources of contamination Possible sources: Private septic systems: North of the City of Florence within UGB Stormwater Commercial/Industrial chemical use and disposal Fuel storage tanks Pesticides and fertilizers How to Use the Information To build a water quality/quantity data record Compare data over time To identify any changes of concern To note any suspected effects of climate change To develop a Groundwater Flow model

To evaluate interaction between groundwater and surface water To identify capture zones for future municipal supply wells To determine habitat protection and/or enhancement needed for fish and wildlife To plan for potential future impacts of climate change To educate the community Climate Change Potential impacts Sea level rise Land inundation Saltwater intrusion Making wells unusable (Freeze and Cherry 1979)

Areas Potentially impacted by sea level rise. (Weiss, Overpeck and Strauss 2010) Climate Change Potential impacts Change in precipitation patterns Increase in winter, decrease in summer Increase in air and water temperature Increase in storm intensity and frequency Potential strategies

Continue water monitoring Develop a Source Water (Aquifer) Protection plan Maintain and restore wetlands and riparian areas Integrate potential climate change impacts into infrastructure planning Tsunami Land inundation Water quality impacts SEP as a Model for Others Collaboration: City, Tribes, Agencies, Stakeholders Public Outreach & Involvement Open Houses

Website & mailings Community Stakeholder Group Elected Officials Stakeholder Group Youth workshops & field trips Science-based Data collection and analysis Holistic: Groundwater and Surface waters Funding Opportunities EPA http://www.epa.gov/epahome/grants.htm Boise State University Directory of Watershed Resources http://efc.boisestate.edu/Default.aspx? alias=efc.boisestate.edu/watershed

League of Oregon Cities http://www.orcities.org/ Network of Oregon Watershed Councils http://oregonwatersheds.org/events/funding/ Oregon Watershed Enhancement Board http://www.oregon.gov/OWEB/GRANTS/index.shtml For more information: Siuslaw Estuary Partnership website www.siuslawwaters.org Suzanne Moellendorf, GSI Water Solutions, Inc. [email protected] 541-753-0745 ext. 204 References Freeze, R.A. and J.A.Cherry. 1979. Groundwater. Prentice-Hall,

Englewood Cliffs. Pg 376. Siuslaw Estuary Partnership. 2010. Project Overview and Study Area Map. Weiss, J.L., J.T. Overpeck, and B. Strauss. 2011. Implications of recent sea level rise science for low-elevation areas in coastal cities of the conterminous U.S.A. Climate Change DOI. Also in the Siuslaw Estuary Partnerships Climate Change Report, 2011. Munsel Greenway Park

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