Alkalinity, organic carbon, nitrogen, and major anions for Pennypack Creek, Philadelphia, PA, USA

This resource includes stream chemistry for Pennypack Creek, Philadelphia County, Pennsylvania. 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 01467048 (PPRH) and 01467042 (PPPI). 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.

本数据集收录宾夕法尼亚州费城县彭尼派克溪（Pennypack Creek）的溪流化学数据。本数据集隶属于美国国家科学基金会（National Science Foundation, NSF）临界带（Critical Zone）协作网络下的城市临界带集群（Urban Critical Zone Cluster）。研究人员每两周采集一次溪流瞬时水样，并对以下指标开展分析：碱度、总有机碳、溶解态有机碳、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）编号为01467048（PPRH）及01467042（PPPI）的溪流测站重合布设。本数据集的采集目标包括：1） 开展时空维度的趋势分析；2） 评估区域地质、人为扰动以及风化作用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。