Survey of Reservoir Greenhouse gas Emissions file:///P:/PDF_Harvest/ScienceInventory/ScienceInventoiyHarvest/600. Survey of Reservoir Greenhouse gas Emissions Beaver Creek Upgrourid Reservoir Water Quality Survey Jake Beaulieu 27 June, 2022 1. Background Between 2020 and 2023 the US Environmental Protection Agency (USEPA) will survey water quality and greenhouse gas (GHG) emissions from 108 reservoirs distributed across the United States (Figure 1). The objective of the research is to estimate the magnitude of GHG emissions from US reservoirs. All reservoirs included in this study were previously sampled by the USEPA during the 2017 National Lakes Assessment (2017 NLA). Data from the 2017 NLA can be found at the EPA website (https://www.epa.gov/national- aquatic-resource-surveys/data-national-aquatic-resource-surveys). Data for Beaver Creek Upground Reservoir can be found under SITEJD NLA17_OH-10007. Afield sensor is used to measure chlorophyll a. dissolved oxygen. pH, specific conductivity, water temperature, and turbidity near the water surface at a minimum of 15 locations within each reservoir. Water samples are collected from the deepest site for analysis of nutrients and chlorophyll a. This preliminary report presents water quality results for Beaver Creek Upground Reservoir. These data will be included in a formal peer-reviewed publication to be submitted for publication in 2024. Ecoregions Coastal Plains Northern Appalachians Northern Plains Southern Appalachians Southern Plains Temperate Plains Upper Midwest Western Mountains Leaflet (https://leafletjs.com) | Tiles © Esri — Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, UPR-EGP, and the GIS User Community Figure 1. Location of the 108 Reservoirs Included in Study. 2. Beaver Creek Upground Reservoir Survey Design The Beaver Creek Upground Reservoir survey design included 15 sampling sites that were sampled on 2020-07-27. Water chemistry samples were collected from a 9.1m deep site nearby the dam (Figure 2). Click on any of the sites to see the site id, water temperature. pH, turbidity, and dissolved oxygen at the water surface. + Sample sites II i sensor sites Leaflet (https://leafletjs.com) | Tiles © Esri — Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, [g UPR-EGP, and the GIS User Community 1 of 5 12/14/2022, 3:17 PM ------- Survey of Reservoir Greenhouse gas Emissions file:///P:/PDF_Harvest/ScienceInventory/ScienceInventoiyHarvest/600... aaaa M / Ik V Figure 2. Location of the 15 sampling sites in Beaver Creek Upground Reservoir. 3. Lake Disturbance and Trophic Status Lake condition can be classified by degree of disturbance relative to undisturbed lakes (i.e. reference lakes) within the ecoregion. Degree of disturbance can be based on a wide variety of metrics, but here we use nutrients (total phosphorus (TP), total nitrogen (TIM)), turbidity, chlorophyll a, and dissolved oxygen (DO). All lake disturbance values are least disturbed. Chemical Condition Indicators Measured at Water Chemistry Site Threshold Values Observed Values parameter units least disturbed moderately disturbed most disturbed concentration status DO mg/l >5 >3 & <5 <3 11 least disturbed turbidity NTU <37 >3.7 & <5.38 >5.38 0.43 least disturbed TP ug/l <49 >49 & <82 >82 19 least disturbed TN ug/l <1105 >1105 & <1699 >1699 952 least disturbed 4. Within-lake Spatial Patterns A field sensor was used to measure water temperature, pH, dissolved oxygen, and turbidity near the water surface at all sampling sites. Data are reported in figures and tables below. Hover the curser over any point in the figures to reveal the sitelD corresponding to the adjacent data table. Alternatively, click on any row in the data table to reveal the location of the sampling site on the map. Turbidity, dissolved oxygen, and temperature were relatively constant at 0.1 m depth throughout the reservoir. This likely reflects the simple shape of the reservoir and the lack of natural tributary inputs and outflows. water sitelD temp 2 20.63 3 20.74 4 20.82 5 20.63 6 20.63 7 20.8 2 of 5 12/14/2022, 3:17 PM ------- Survey of Reservoir Greenhouse gas Emissions file:///P:/PDF_Harvest/ScienceInventory/ScienceInventoiyHarvest/600. water sitelD temp 8 20.8 9 20.62 10 20.87 11 20.88 12 20.63 13 20.53 14 20.57 15 20.63 sitelD pH 2 5.23 3 10.24 4 6.23 5 5.16 6 5.11 7 5.92 8 6.39 9 5.02 10 6.34 11 6.47 12 4.95 13 5.6 14 6.87 15 7.51 3 of 5 12/14/2022, 3:17 PM ------- |