Water quality synoptic data for Dead Run, Baltimore County, MD USA

This resource includes water quality data from synoptic sampling of streams and wells in Dead Run watershed, Baltimore County, MD. The stream network was sampled from the outlet at Dead Run Franklintown (DRKR) to the headwaters (Winters Lane in DR5) every 50 m over 5 km, after approximately 10 days of no rain, 2 to 3 times per year from 2014 - 2017. In addition, DR5 headwaters were sampled every 50 m over 1 km approximately monthly from 2017 - 2020. A network of 35 point piezometers in the DR5 subwatershed were also sampled 2-3 times per year from 2017 - 2020. Stream and well samples were analyzed for chloride, fluoride, nitrate-nitrogen and sulfate on a Dionex ion chromatography system. A subset of samples was also analyzed for d18O and d2H on a Picarro 2120-i water isotope analyzer. Three of the synoptic sampling sites are co-located with USGS stream gaging stations 01589315 (DR4), 01589312 (DR5), and 01589330 (DRKR).

本资源包含来自马里兰州巴尔的摩县Dead Run流域的溪流和井水的水质数据，这些数据是通过对该流域的溪流网络进行综合采样获得的。采样范围从Dead Run Franklintown（DRKR）出口至源头（DR5中的Winters Lane），每隔50米采集一次，总长度5公里，采样频率为每年2至3次，自2014年至2017年，且在连续10天无雨后进行。此外，从2017年至2020年，DR5源头每隔50米约每月采样一次。在DR5子流域中，还设有35个点式水压计，每年2至3次进行采样。溪流和井水样本在Dionex离子色谱分析系统上进行分析，以测定氯离子、氟离子、硝酸盐氮和硫酸盐。样本子集在Picarro 2120-i水同位素分析仪上进行分析，以测定d18O和d2H。其中三个综合采样点与USGS溪流流量监测站01589315（DR4）、01589312（DR5）和01589330（DRKR）重叠。