Water quality sondes have the advantage of containing multiple sensors,extended deployment times,high temporal resolution,and telecommunication with stakeholder accessible data portals.However,sondes that are part of ...Water quality sondes have the advantage of containing multiple sensors,extended deployment times,high temporal resolution,and telecommunication with stakeholder accessible data portals.However,sondes that are part of buoy deployments often suffer from typically being fixed at one depth.Because water treatment plants are interested in water quality at a depth of the water intake and other stakeholders(ex.boaters and swimmers)are interested in the surface,we examined whether a fixed depth of approximately 1 m could cause over-or under-estimation of cyanobacterial biomass.We sampled the vertical distribution of cyanobacteria adjacent to a water quality sonde buoy in the western basin of Lake Erie during the summers of 2015–2017.A comparison of buoy cyanobacteria RFU(Relative Fluorescence Unit)at 1 m to cyanobacteria chlorophyll a(chla)measured throughout the water column showed occurrences when the buoy both under and overestimated the cyanobacteria chl a at specific depths.Largest differences between buoy measurements and at-depth grab samples occurred during low wind speeds(<4.5 m/sec)because low winds allowed cyanobacteria to accumulate at the surface above the buoy’s sonde.Higher wind speeds(>4.5 m/sec)resulted in better agreement between the buoy and at-depth measurements.Averaging wind speeds 12 hr before sample collection decreased the difference between the buoy and at-depth samples for high wind speeds but not low speeds.We suggest that sondes should be placed at a depth of interest for the appropriate stakeholder group or deploy sondes with the ability to sample at various depths.展开更多
This study examines the transaction costs of collaborative watershed management in the Cuyahoga River Area of Concern(AOC)—one of the 43 geographic areas designated by the U.S.and Canada Great Lakes Water Quality Agr...This study examines the transaction costs of collaborative watershed management in the Cuyahoga River Area of Concern(AOC)—one of the 43 geographic areas designated by the U.S.and Canada Great Lakes Water Quality Agreement(GLWQA),where significant impairment of beneficial uses has occurred as a result of human activities.The Cuyahoga River is located in Northeast Ohio,the U.S.and flows through the City of Cleveland before draining into Lake Erie—one of the five Great Lakes of North America.The watershed is degraded due to municipal and agricultural discharges,streambank erosion,and contamination from urban and industrial sources.This research explores how a diverse group of stakeholders convened under the Cuyahoga River AOC Advisory Committee to share information,coordinate activities,agree on activities that restore beneficial uses,and support strategic management actions.In this study,23 semi-structured interviews with members of the advisory committee were conducted between January 28,2020 and April 20,2020,with follow-up emails and phone calls as needed to corroborate information.A review of research articles and government documents supported the interviews,including United States Environmental Protection Agency(U.S.EPA)and Ohio Environment Production Agency(OEPA)reports on the GLWQA and Cuyahoga River Remedial Action Plans.A third source of data is from direct participant observation at quarterly meetings of the advisory committee during 2017–2020,binational AOC conferences in 2017 and 2019,and other professional events geared towards restoring the Cuyahoga River AOC in 2016–2020.Results of this study include a set of recommendations to help guide group structure and decision-making processes,including(1)employing best available technology to organize AOC events and disseminate information;(2)supporting new members with an orientation and/or mentor to clearly define formal and informal committee rules;(3)assuring equal access to detailed information on management action plans with a real time dashboard;(4)updating voting procedures and the prioritization of management actions;and(5)better incorporating underrepresented local communities and highlevel decision makers from municipalities,government agencies,and nongovernmental organizations located within the Cuyahoga River AOC.Results help to explain the collaborative process within the advisory committee and measure the institutional performance of the advisory committee in terms of efficiency,equitability,accountability,and adaptability.展开更多
基金funded by the Ohio Water Resources Center under award number 2016OH484BOhio Sea GrantFriends of Stone Lab。
文摘Water quality sondes have the advantage of containing multiple sensors,extended deployment times,high temporal resolution,and telecommunication with stakeholder accessible data portals.However,sondes that are part of buoy deployments often suffer from typically being fixed at one depth.Because water treatment plants are interested in water quality at a depth of the water intake and other stakeholders(ex.boaters and swimmers)are interested in the surface,we examined whether a fixed depth of approximately 1 m could cause over-or under-estimation of cyanobacterial biomass.We sampled the vertical distribution of cyanobacteria adjacent to a water quality sonde buoy in the western basin of Lake Erie during the summers of 2015–2017.A comparison of buoy cyanobacteria RFU(Relative Fluorescence Unit)at 1 m to cyanobacteria chlorophyll a(chla)measured throughout the water column showed occurrences when the buoy both under and overestimated the cyanobacteria chl a at specific depths.Largest differences between buoy measurements and at-depth grab samples occurred during low wind speeds(<4.5 m/sec)because low winds allowed cyanobacteria to accumulate at the surface above the buoy’s sonde.Higher wind speeds(>4.5 m/sec)resulted in better agreement between the buoy and at-depth measurements.Averaging wind speeds 12 hr before sample collection decreased the difference between the buoy and at-depth samples for high wind speeds but not low speeds.We suggest that sondes should be placed at a depth of interest for the appropriate stakeholder group or deploy sondes with the ability to sample at various depths.
文摘This study examines the transaction costs of collaborative watershed management in the Cuyahoga River Area of Concern(AOC)—one of the 43 geographic areas designated by the U.S.and Canada Great Lakes Water Quality Agreement(GLWQA),where significant impairment of beneficial uses has occurred as a result of human activities.The Cuyahoga River is located in Northeast Ohio,the U.S.and flows through the City of Cleveland before draining into Lake Erie—one of the five Great Lakes of North America.The watershed is degraded due to municipal and agricultural discharges,streambank erosion,and contamination from urban and industrial sources.This research explores how a diverse group of stakeholders convened under the Cuyahoga River AOC Advisory Committee to share information,coordinate activities,agree on activities that restore beneficial uses,and support strategic management actions.In this study,23 semi-structured interviews with members of the advisory committee were conducted between January 28,2020 and April 20,2020,with follow-up emails and phone calls as needed to corroborate information.A review of research articles and government documents supported the interviews,including United States Environmental Protection Agency(U.S.EPA)and Ohio Environment Production Agency(OEPA)reports on the GLWQA and Cuyahoga River Remedial Action Plans.A third source of data is from direct participant observation at quarterly meetings of the advisory committee during 2017–2020,binational AOC conferences in 2017 and 2019,and other professional events geared towards restoring the Cuyahoga River AOC in 2016–2020.Results of this study include a set of recommendations to help guide group structure and decision-making processes,including(1)employing best available technology to organize AOC events and disseminate information;(2)supporting new members with an orientation and/or mentor to clearly define formal and informal committee rules;(3)assuring equal access to detailed information on management action plans with a real time dashboard;(4)updating voting procedures and the prioritization of management actions;and(5)better incorporating underrepresented local communities and highlevel decision makers from municipalities,government agencies,and nongovernmental organizations located within the Cuyahoga River AOC.Results help to explain the collaborative process within the advisory committee and measure the institutional performance of the advisory committee in terms of efficiency,equitability,accountability,and adaptability.
