Water-quality monitoring of Canyon Lake, 2017-2018 Galen - PowerPoint PPT Presentation

Water-quality monitoring of Canyon Lake, 2017-2018 Galen Hoogestraat Hydrologist, U.S. Geological Survey U.S. Department of the Interior U.S. Geological Survey

Overview  Who we are: USGS Dakota Water Science Center  Canyon Lake background  Proposed monitoring project  Purpose  Public benefits  Approach  Funding

USGS Dakota Water Science Center  Department of Interior agency  Mission: collect high-quality hydrologic data and conduct objective scientific investigations on the quantity, quality, and use of surface-water and groundwater resources of the Dakotas  Primary funding is from cooperative water projects with state, county, and municipal- level agencies  https://sd.water.usgs.gov/

Canyon Lake is important for tourism and local recreation

Management of Canyon Lake draws huge interest from the community

Purpose of project:  Evaluate water quality and protect uses  Assist with water management (dredging)  Currently, limited bacteria data available DENR Statewide Lakes Assessment data, from Paul Lorenzen, February 2017.

Limited data availability, cont.  Nutrients: DENR Statewide Lakes Assessment data, from Paul Lorenzen, February 2017.

Current DENR WQM sites

Public benefits and outcomes  Do waterfowl significantly affect downstream water quality?  Did the dredging have temporary or long term benefits to water clarity?  Does Canyon Lake support beneficial use criteria for immersion recreation?

Approach  5 sampling locations  Above, within, below Canyon Lake  16 sampling visits during 2017-18  Bi-monthly, and 4 storm runoff events  Water-quality parameters:  Temp, pH, SC, DO, Turb  Nutrients  TSS  E. coli

Products  Data stored on publicly-available NWIS  Progress reports to WDWDD  Could include publication with future phase  Results will dictate this

Funding request  2 years, $40k total from WDWDD  Matched with $20k from USGS coop funds

Summary  Within scope of WDWDD involvement  Water management, water quality evaluation and protection, maintaining use for recreation  Funding within WDWDD policies  Public benefit: both locals and visitors  Needed: fills gaps in state monitoring, assesses dredging operations, improves decision making for the community