Water isotope data for Northwest Branch Anacostia River, MD, USA

This resource includes water isotope data from Northwest Branch Anacostia River near Hyattsville MD (NWB1) and near Colesville, MD (NWB2), as well as precipitation data collected in University Park, MD. Stream grab samples are collected biweekly; precipitation samples are collected for every precipitation event. Samples are analyzed for d18O and d2H on a Picarro L 2120-i water isotope analyzer at UMBC. Data are collected for the purpose of (1) cross-site comparison with other sites in the Urban CZ cluster; (2) determination of the local meteoric water line; and (3) calculation of mean watershed transit times. Stream sampling sites are co-located with USGS stream gaging stations 01651000 (NWB1) and 01650500 (NWB2). This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.

本数据集包含采自马里兰州海茨维尔附近阿纳科斯蒂亚河北支（Northwest Branch Anacostia River，NWB1）以及马里兰州科尔兹维尔附近该河监测点位（NWB2）的水体同位素数据，同时包含马里兰州大学园采集的降水数据。河道瞬时水样每两周采集一次，降水水样则随每次降水事件采集。所有水样均在马里兰大学巴尔的摩县分校（University of Maryland, Baltimore County, UMBC）的Picarro L 2120-i水同位素分析仪上完成δ¹⁸O与δ²H的分析测试。本数据集的采集目标如下：（1）与城市关键带（Critical Zone, CZ）集群内其他站点开展跨站点对比研究；（2）确定局地大气降水线；（3）计算流域平均水流驻留时间。河道采样点位分别与美国地质调查局（United States Geological Survey, USGS）布设的01651000（对应NWB1）和01650500（对应NWB2）河道水文监测站重合。本数据集隶属于美国国家科学基金会（National Science Foundation, NSF）关键带协作网络旗下的城市关键带集群项目。