Water Quality Tributary Monitoring

This data supports the need to determine exit loads of nutrients to Western Lake Ontario, and of the water quality characteristics of the water discharged into the nearshore of the lake, focused on the heavily urbanized rivers which predominate on the Ontario shores of the lake. During periods of elevated river discharge coincident with wet weather and snow melt discharge volume-weighted and time-integrated water samples were collected using automated ISCO water samplers controlled remotely. The samples were analyzed for nutrients, chloride and selected water quality variables used to interpret the sources of the nutrient loads. In addition to the event samples, monthly grab samples were collected during low river flow to provide information on water quality and loading levels under river baseflow conditions. The river sampling is year-round with special emphasis on winter and early spring conditions, periods when high discharge and loading rates are most expected. The laboratory analysis of the water samples was conducted at the York Durham Regional Environmental Laboratory (YDREL). Attributes Notes Lab: MDL = Minimum detection level that the lab can detect Data Limitations: Some attributes of supplemental information are incomplete Data update frequency: Not Planned本数据集用于支撑安大略湖西水域营养盐输出负荷，以及入湖近岸排放水体水质特征的测定工作，研究重点聚焦于该湖安大略岸段的主要高度城市化河流。在强降雨及融雪引发河流水量升高的时段，采用远程控制的自动化ISCO水质采样器采集体积加权且时间积分的水样。对采集的水样开展营养盐、氯化物及选定水质变量的检测分析，以解析营养盐负荷的来源。除上述径流事件水样外，研究团队在河流枯水期采集月度瞬时水样，以获取河基流条件下的水质及负荷水平相关数据。河流采样工作全年开展，重点关注冬季与早春时段——该时期通常是河流水量与负荷率峰值出现的阶段。水样的实验室分析工作由约克-达勒姆地区环境实验室（York Durham Regional Environmental Laboratory, YDREL）完成。属性备注：实验室检测限（MDL, Minimum Detection Level）为实验室可检出的最低浓度；数据局限性：部分补充信息的属性存在缺失；数据更新频率：无更新计划。