Dissolved Metal and Metalloid Concentrations for Northwest Branch Anacostia River, Prince George's and Montgomery Counties, MD, USA

This resource includes stream chemistry for the NW Branch Anacostia River, Prince George's and Montgomery Counties, MD. This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network. Stream grab samples are collected biweekly, as well as longitudinal synoptics 2-3 times per year, and analyzed on an ICPMS for 38 dissolved metals and metalloids. Stream sampling sites are co-located with USGS stream gaging stations 1651000 (NWB1) and 01650500 (NWB2). Data are collected for the purpose of (1) trend analysis as a function of space and time; (2) evaluation of the effects of regional geology, anthropogenic perturbations, and weathering processes on stream chemistry; and (3) comparison with stream chemistry from other sites in the Urban CZ cluster.

本数据集涵盖美国马里兰州乔治王子县与蒙哥马利县境内阿纳科斯蒂亚河北支流（NW Branch Anacostia River）的河流水化学数据。本数据集隶属于美国国家科学基金会（National Science Foundation, NSF）临界带协作网络中的城市临界带集群（Urban Critical Zone Cluster）。研究团队每两周采集一次河流水质瞬时水样，并于每年开展2至3次纵向同步巡测；所有水样均通过电感耦合等离子体质谱仪（Inductively Coupled Plasma Mass Spectrometry, ICPMS）进行分析，检测38种溶解态金属与类金属元素。本次河流水样采集点位与美国地质调查局（United States Geological Survey, USGS）下辖的两座河道水文站——1651000号（命名为NWB1）与01650500号（命名为NWB2）——重合布设。本数据集的采集目标包括：（1）开展河流水化学的时空趋势分析；（2）评估区域地质、人为扰动与风化作用对河流水化学特征的影响；（3）与城市临界带集群内其他监测点位的河流水化学数据开展对比研究。