Alkalinity, organic carbon, nitrogen, and major anions for Dead Run, Baltimore County, MD USA

This resource includes stream chemistry for Dead Run, Baltimore County, Maryland. This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network. Stream grab samples are collected biweekly and analyzed for alkalinity, total organic carbon, dissolved organic carbon, total nitrogen, total dissolved nitrogen, bromide, chloride, fluoride, nitrate-nitrogen, nitrite-nitrogen, orthophosphate phosphorous, and sulfate. Stream sampling sites are co-located with USGS stream gaging stations 01589315 (DR4), 01589312 (DR5), and 01589330 (DRKR). 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巴尔的摩县死河（Dead Run）的溪流化学特征数据。本数据集隶属于美国国家科学基金会（National Science Foundation, NSF）临界带（Critical Zone）协作网络旗下的城市临界带集群。研究人员每两周采集一次溪流瞬时水样，并针对以下指标开展分析：碱度、总有机碳、溶解性有机碳、总氮、总溶解态氮、溴化物、氯化物、氟化物、硝态氮、亚硝态氮、正磷酸盐磷以及硫酸盐。溪流采样点位与美国地质调查局（United States Geological Survey, USGS）的3座溪流测流站——01589315（DR4）、01589312（DR5）及01589330（DRKR）——同址布设。本数据集的采集目标包括：1）开展溪流化学特征随空间与时间变化的趋势分析；2）评估区域地质、人为扰动及风化过程对溪流化学特征的影响；3）与城市临界带集群内其他点位的溪流化学数据开展对比研究。