Filtered chlorophyll a time series for Beaverdam Reservoir, Carvins Cove Reservoir, Claytor Lake, Falling Creek Reservoir, Gatewood Reservoir, Smith Mountain Lake, Spring Hollow Reservoir in southwestern Virginia, and Lake Sunapee in Sunapee, New Hampshire, USA during 2014-2023

Water column chlorophyll a was analyzed from 2014 to 2023 in seven freshwater reservoirs in southwestern Virginia (VA), USA, and one freshwater lake in central New Hampshire (NH), USA. These waterbodies are: Beaverdam Reservoir (Vinton, VA), Carvins Cove Reservoir (Roanoke, VA), Claytor Lake (Pulaski, VA), Falling Creek Reservoir (Vinton, VA), Gatewood Reservoir (Pulaski, VA), Smith Mountain Lake (Bedford, VA), Spring Hollow Reservoir (Salem, VA), and Lake Sunapee (Sunapee, NH). Beaverdam, Carvins Cove, Falling Creek, and Spring Hollow Reservoirs are owned and operated by the Western Virginia Water Authority as primary or secondary drinking water sources for Roanoke, Virginia; Gatewood Reservoir is a drinking water source for the Town of Pulaski, Virginia; and Smith Mountain Lake is jointly treated by the Bedford Regional Water Authority and the Western Virginia Water Authority as a drinking water source for Franklin County, Virginia. Claytor Lake is managed for hydroelectric power generation by the Appalachian Power Company. Lake Sunapee is a glacially-formed lake known for its oligotrophic water quality. The dataset consists of depth profiles of chlorophyll a samples generally measured at the deepest site of each reservoir adjacent to the dam or at the buoy site of Lake Sunapee. The water column samples were collected approximately fortnightly from March-April and weekly from May-October at Falling Creek Reservoir and Beaverdam Reservoir, approximately fortnightly from May-August in most years at Carvins Cove Reservoir, approximately fortnightly from May-August in Gatewood and Spring Hollow Reservoirs from 2014-2016, approximately fortnightly from May-August of 2014 in Smith Mountain Lake, sporadically from May-August of 2014 in Claytor Lake, and sporadically from June-August of 2021 and 2022 in Lake Sunapee. Additional chlorophyll a samples were collected at multiple upstream and inflow sites along tributaries to Beaverdam and Falling Creek Reservoirs in summer 2019. The water samples collected were analyzed for both phaeophytin and chlorophyll a to quantify and correct for degraded phytoplankton within the sample.

本数据集针对美国弗吉尼亚州西南部7座淡水水库与美国新罕布什尔州中部1座淡水湖，于2014至2023年间完成水柱叶绿素a（chlorophyll a）的采样分析。所涉水体包括：弗吉尼亚州文顿的比弗达姆水库（Beaverdam Reservoir）、弗吉尼亚州罗阿诺克的卡文斯湾水库（Carvins Cove Reservoir）、弗吉尼亚州普拉斯基的克莱托尔湖（Claytor Lake）、弗吉尼亚州文顿的福灵溪水库（Falling Creek Reservoir）、弗吉尼亚州普拉斯基的盖特伍德水库（Gatewood Reservoir）、弗吉尼亚州贝德福德的史密斯山湖（Smith Mountain Lake）、弗吉尼亚州塞勒姆的春谷水库（Spring Hollow Reservoir），以及新罕布什尔州苏纳皮的苏纳皮湖（Lake Sunapee）。
其中，比弗达姆、卡文斯湾、福灵溪与春谷水库由西弗吉尼亚水务局（Western Virginia Water Authority）所有并运营，作为弗吉尼亚州罗阿诺克市的一级或二级饮用水源；盖特伍德水库为弗吉尼亚州普拉斯基镇的饮用水源；史密斯山湖由贝德福德区域水务局与西弗吉尼亚水务局联合处理，作为弗吉尼亚州富兰克林县的饮用水源。克莱托尔湖由阿巴拉契亚电力公司（Appalachian Power Company）运营用于水力发电。苏纳皮湖为冰川成因湖泊，以贫营养水质闻名。
本数据集包含叶绿素a样品的深度剖面数据，采样点位通常选在各水库紧邻大坝的最深测点，或苏纳皮湖的浮标测点。
采样时序如下：福灵溪水库与比弗达姆水库的采样大致为3-4月每两周一次，5-10月每周一次；多数年份中，卡文斯湾水库的采样时段为5-8月每两周一次；2014至2016年，盖特伍德水库与春谷水库的采样时段为5-8月每两周一次；史密斯山湖仅在2014年5-8月每两周采样一次；克莱托尔湖仅在2014年5-8月零散采样；苏纳皮湖则分别于2021与2022年6-8月零散采样。
2019年夏季，研究团队还在比弗达姆水库与福灵溪水库的支流沿线多个上游及入水口点位采集了额外的叶绿素a样品。
所采集的水样均同步开展脱镁叶绿素（phaeophytin）与叶绿素a的分析，以定量并校正样品中降解的浮游植物。