Mercury concentrations and water chemical variables measured in La Romaine hydroelectric reservoir complex in the summer of 2016, 2017 and 2018

This dataset includes chemical and physical data measured in situ in water in natural and recently dammed portions of La Romaine River watershed in Northern Quebec, Canada. Samples were collected from 2016 to 2018 in August, as well as in June 2017. For most sites, the samples were collected close to the water surface (30 cm deep) with a peristaltic pump following the clean hands dirty hands sampling protocol to avoid any contamination by trace metals. Filtered samples were collected using an in-line Whatman 0.45 µm filtration capsule attached to the tubing. For June 2017, physicochemical variables collected with a YSI multiprobe, greenhouse gas partial pressure (methane and carbon dioxide), total nutrient concentrations and dissolved metals (iron and manganese) are also included. We used this dataset to explore the distribution in time and space of various forms of mercury and pools of carbon across the dammed watershed of La Romaine and in different aquatic systems (e.g. tributaries, lakes, groundwater, river and reservoir sites).

本数据集收录了加拿大魁北克北部拉罗曼河（La Romaine River）流域自然区域与新近筑坝区域的水体原位理化测量数据。样本采集时间覆盖2016年至2018年的8月，以及2017年6月。多数采样点位的样本采集于距水面30厘米深度处，采用蠕动泵（peristaltic pump）并遵循“净手-脏手”采样规程（clean hands dirty hands sampling protocol），以避免痕量金属污染。过滤样本通过连接于管路的沃特曼（Whatman）0.45 µm在线过滤胶囊采集。针对2017年6月的样本，还收录了采用YSI多参数水质分析仪（YSI multiprobe）测得的理化参数、温室气体分压（甲烷与二氧化碳）、总营养盐浓度以及溶解态金属（铁与锰）数据。本数据集被用于探究拉罗曼河筑坝流域及各类水生系统（如支流、湖泊、地下水、河道与库区点位）中不同形态汞与碳库的时空分布特征。