High-frequency water quality data for Gwynns Falls, Baisman Run, and Pond Branch, Baltimore County and Baltimore City, MD, USA

This resource includes water quality sensor data measured at three stations along the main stem of the Gwynns Falls watershed, spanning an urban to rural gradient of development from Baltimore City to Baltimore County, MD, USA. In addition, two forested reference sites, Baisman Run and Pond Branch at Oregon Ridge, and one urban site, Dead Run (tributary to Gwynns Falls), are instrumented in Baltimore County, MD, USA. Sensor data are collected at a 5-minute frequency by YSI EXO2 sondes that include temperature, specific conductance, turbidity, dissolved oxygen, and pH. In addition, s::can spectrolyser v3 sondes are planned for deployment to measure nitrate-nitrogen and dissolved organic carbon at a 15-minute frequency at 5 of the sites. A Seabird SUNA is currently measuring nitrate-nitrogen at Dead Run at a 30-minute frequency. All Dead Run data are provided in a separate linked resource. High frequency data are collected for the purpose of evaluating event-based water quality /discharge behavior, as a complement to weekly grab-sample stream chemistry data that have been collected by the Baltimore Ecosystem Study since 1998. The six sites are co-located with USGS stream gages. Data are telemetered to UMBC. This data set is part of the Baltimore Social-Environmental Collaborative Urban Integrated Field Laboratory supported by Department of Energy as well as the Critical Zone Collaborative Network supported by NSF.

本数据集涵盖沿美国马里兰州甘恩斯福尔斯（Gwynns Falls）流域干流布设的3处监测站的水质传感器数据，覆盖从巴尔的摩市到巴尔的摩县的城市至乡村开发梯度。此外，在美国马里兰州巴尔的摩县还设有两处森林参考站点——拜斯曼伦（Baisman Run）与俄勒冈岭庞德支流（Pond Branch at Oregon Ridge），以及一处城市站点死溪（Dead Run，甘恩斯福尔斯支流），均已完成监测仪器部署。数据由YSI EXO2 水质探头（YSI EXO2 sondes）以5分钟的采集频率获取，监测指标涵盖水温、比电导率、浊度、溶解氧与pH值。此外，计划部署s::can spectrolyser v3 水质探头，以15分钟的频率在其中5处站点监测硝态氮与溶解性有机碳。目前，Seabird SUNA 传感器正以30分钟的频率在死溪站点开展硝态氮监测。所有死溪站点的监测数据均收录于单独的关联数据资源中。本次高频数据采集旨在评估基于水文事件的水质与径流特征，作为巴尔的摩生态系统研究（Baltimore Ecosystem Study）自1998年起采集的每周河道水质瞬时采样数据的补充。上述6处监测站点均与美国地质调查局（USGS）的河道水位站同步布设。监测数据通过遥传方式传输至马里兰大学巴尔的摩县分校（UMBC）。本数据集隶属于美国能源部（Department of Energy）支持的巴尔的摩社会-环境协作城市综合现场实验室项目，以及美国国家科学基金会（NSF）支持的关键带协作网络项目。