Time series of total and soluble metal concentrations from Falling Creek Reservoir, Beaverdam Reservoir, and Carvins Cove Reservoir in southwestern Virginia, USA from 2014-2024

Depth profiles of total and soluble metals were sampled from 2014-2024 in three drinking-water reservoirs, Falling Creek Reservoir (FCR), Beaverdam Reservoir (BVR), and Carvins Cove Reservoir (CCR). FCR and BVR are located in Vinton, Virginia, USA and CCR is located in Roanoke, Virginia, USA. Only Fe and Mn were analyzed from 2014-2019. The full suite of metals (Li, Na, Mg, Al, Si, K, Ca, Fe, Mn, Cu, Sr, Ba) were analyzed from 2020-2024. All reservoirs are owned and operated by the Western Virginia Water Authority and are managed as drinking-water sources for the city of Roanoke, VA. The dataset includes metal samples that were collected along a depth profile taken at the deepest site of each reservoir near the dam. Additional samples were collected at a gauged weir located on the primary inflow tributary, as well as at a secondary tributary to FCR. A 2024 sampling campaign at FCR included outflow spillway surface water sampling. A 2022 sampling campaign at CCR included inflows and a partial depth profile at the deepest site. Sampling frequency in FCR and BVR in 2024 was approximately weekly during the summer and fall (May - October), approximately fortnightly during the spring (March - April), and approximately monthly during the winter (November - March). For previous sampling campaign frequencies, please see past revisions of this data product.

2014年至2024年，研究团队对三座饮用水水库——瀑布溪水库（Falling Creek Reservoir, FCR）、比弗达姆水库（Beaverdam Reservoir, BVR）与卡文斯湾水库（Carvins Cove Reservoir, CCR）——的总金属（total metals）与可溶性金属（soluble metals）深度剖面（depth profile）开展了采样工作。其中FCR与BVR坐落于美国弗吉尼亚州文顿市，CCR则位于美国弗吉尼亚州罗阿诺克市。2014年至2019年仅对铁（Fe）与锰（Mn）两种元素开展分析；2020年至2024年则覆盖全套金属元素分析，包括锂（Li）、钠（Na）、镁（Mg）、铝（Al）、硅（Si）、钾（K）、钙（Ca）、铁（Fe）、锰（Mn）、铜（Cu）、锶（Sr）与钡（Ba）。上述三座水库均由西弗吉尼亚水务管理局（Western Virginia Water Authority）所有并运营，作为弗吉尼亚州罗阿诺克市的饮用水源进行管理。本数据集包含在各水库大坝附近的最深测点沿深度剖面采集的金属样品；此外还在主要入流支流的计量堰（gauged weir）以及FCR的二级支流处采集了补充样品。2024年针对FCR的采样活动还涵盖了溢洪道（spillway）地表水采样；2022年针对CCR的采样活动则涵盖了入流样品采集以及最深测点的部分深度剖面样品。2024年FCR与BVR的采样频率大致为：夏秋季节（5月至10月）每周一次，春季（3月至4月）每两周一次，冬季（11月至次年3月）每月一次。如需了解过往采样活动的频率，请参阅本数据产品的历次修订版本。