Time series of high-frequency sensor data measuring water temperature, dissolved oxygen, conductivity, specific conductance, total dissolved solids, chlorophyll a, phycocyanin, and fluorescent dissolved organic matter at discrete depths in Carvins Cove Reservoir, Virginia, USA in 2020-2023

We monitored water quality in Carvins Cove Reservoir (Roanoke, Virginia, USA) with high-frequency (10-minute) sensors in 2020-2023. Carvins Cove Reservoir is owned and managed by the Western Virginia Water Authority as a primary drinking water source. This data package consists of datasets from two separate deployments. First, from July 2020 - August 2021, depth profiles of water temperature were measured on 1-meter intervals using HOBO temperature pendant loggers deployed from 0.1 m below the surface of the reservoir to 10 m depth, and also at 15 and 20 m depth. Additionally, water temperature was measured in the Sawmill Branch inflow at 0.5 m depth using HOBO temperature pendant loggers. Second, from 9 April 2021 - 31 December 2023, depth profiles of water temperature were measured on 1-meter intervals from 0.1 m below the surface of the reservoir to 11 m depth and additionally at 15 and 19 m. A YSI EXO2 sonde measured water temperature, conductivity, specific conductance, chlorophyll a, phycocyanin, total dissolved solids, dissolved oxygen, and fluorescent dissolved organic matter at ~1.5 m depth. A YSI EXO3 sonde measured water temperature, conductivity, specific conductance, total dissolved solids, dissolved oxygen, and fluorescent dissolved organic matter at 9 m depth, which corresponds to the depth of a water outtake valve. The thermistors, EXO3 sonde, and pressure sensor were deployed at stationary, fixed elevations (referred to as positions) deployed off of the dam near the water outtake valves. Due to variable water levels in the reservoir, the depths of these sensors varied over time. In contrast, the EXO2 was deployed on a buoy from 2021-2022 and remained at 1.5 m depth as the water level fluctuated. However, in 2023, the buoy disappeared in a storm, after that the EOX2 was deployed at a stationary elevation as the water level fluctuated around the sensor. At the monitoring site, the reservoir is approximately 19 m deep (reservoir maximum depth is 23 m).本数据集针对美国弗吉尼亚州罗阿诺克市的卡文斯湾水库（Carvins Cove Reservoir）开展2020至2023年的水质监测，监测采用高频（10分钟间隔）传感器完成。卡文斯湾水库由弗吉尼亚西部水务管理局（Western Virginia Water Authority）所有并运营，作为核心饮用水源地。本数据包包含两次独立布设的监测数据集。首次布设阶段为2020年7月至2021年8月，采用HOBO悬置式温度记录仪（HOBO temperature pendant loggers）以1米间隔采集水库水温垂向剖面数据，布设范围从水库水面下0.1米至10米深度，同时在15米、20米深度处增设测点。此外，采用HOBO悬置式温度记录仪在锯木厂支流（Sawmill Branch）入水口0.5米深度处采集水温数据。第二次布设阶段为2021年4月9日至2023年12月31日，同样以1米间隔采集水温垂向剖面数据，布设范围从水库水面下0.1米至11米深度，同时增设15米、19米深度测点。YSI EXO2水质探头在约1.5米深度处采集水温、电导率、比电导率、叶绿素a、藻蓝蛋白、总溶解固体、溶解氧及荧光性溶解有机物数据。YSI EXO3水质探头在9米深度处采集水温、电导率、比电导率、总溶解固体、溶解氧及荧光性溶解有机物数据，该深度对应水库取水阀的埋设深度。热敏电阻传感器、YSI EXO3水质探头及压力传感器均固定布设于取水阀附近的大坝外侧，采用固定高程（即固定点位）部署。由于水库水位存在波动，上述传感器的实际监测深度随时间发生变化。与之形成对比的是，YSI EXO2水质探头于2021至2022年布设于浮标上，可随水位波动始终保持在1.5米深度处。但2023年浮标在风暴中遗失，此后YSI EXO2水质探头改为固定高程布设，随水位波动调整实际监测深度。本次监测点位所在的水库区域水深约19米，该水库最大水深为23米。