ABSTRACT:

This resource includes conductivity, temperature, and specific conductance data for Northwest Branch Anacostia River near Colesville, MD. Data were collected for the purpose of cross-site comparison and correlating to other water quality parameters such as chloride. Conductivity and temperature were collected using a HOBO Fresh Water Conductivity Data Logger (Part # U24-001, Onset Computer Corp.) and converted to specific conductance at 25˚C. Data were collected at a 15-minute interval and downloaded manually every 60 days. The instrument is co-located with USGS stream gaging station 01650500. This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.

ABSTRACT:

This resource includes temperature data collected throughout the Dead Run stream network in Woodlawn, Baltimore County, MD. Data are being collected for the purpose of assessing the impacts of stormwater management facilities on the thermal regime of a Maryland Class IV stream. Temperature data are collected using HOBO TidbiT MX Temp 400 (MX2203) sensors (Part # MX2203, Onset Computer Corp.) secured to the streambed with rebar and zip ties. 169 sensors have been deployed at a spatial increment of 100 m over 16 km of stream length. Data are collected at a 5-minute interval and downloaded every ~150 days.

ABSTRACT:

This resource includes air temperature data collected at six stations in Dead Run watershed near Woodlawn, Baltimore County, MD. Data are being collected together with stream temperature data for the purpose of assessing the impacts of stormwater management facilities on the thermal regime of a Maryland Class IV stream. Air temperature data are collected using HOBO MX2305 Temperature Data Loggers (Part # MX2305, Onset Computer Corp.) protected by solar radiation shields (Part # RS1, Onset Computer Corp.), each mounted to a pole co-located with six USGS stream gaging stations. Data are collected at a 5-minute interval and downloaded via Blue Tooth every 90 days.

ABSTRACT:

This collection contains the following resource data sets for Dead Run watershed in Baltimore County, Maryland, USA: stream chemistry, stream temperature, stream depth, groundwater levels, groundwater chemistry, groundwater temperature, barometric pressure, air temperature, PAR (photosynthetic active radiation), soil gas data, soil moisture data, and subsurface permeability.

ABSTRACT:

This collection contains the following resource data sets for the NW Branch Anacostia watershed in Montgomery County, Maryland, USA: stream chemistry and stream temperature.

ABSTRACT:

This collection contains the following resource data sets for Pennypack Creek watershed in Philadelphia, Pennsylvania, USA: stream chemistry; shape files of watershed delineation.

ABSTRACT:

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.

ABSTRACT:

This resource includes water isotope data from Pennypack Creek at Lower Rhawn St Bridge, Philadelphia, PA (PPRH) and Pennypack Creek at Pine Road, at Philadelphia, PA (PPRI) as well as precipitation data collected in Fort Washington, PA. Stream grab samples are collected biweekly; precipitation samples are collected for every precipitation event. Samples are analyzed for d18O and d2H on a Picarro L2120-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 01467048 (PPRI) and 01467042 (PPPI). This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.

ABSTRACT:

This resource includes shapefiles of spatial features from Dead Run watershed in Baltimore County, Maryland. These data are frequently used in support of hydrologic observational and modeling studies. Layers include hydrography, watershed and subwatershed boundaries, fraction impervious surface area, and stream gage locations. The stream gage locations correspond to USGS stream gaging stations 01589317 (DR1), 01589316 (DR2), 01589320 (DR3), 01589315 (DR4), 01589312 (DR5), and 01589330 (DRKR).

ABSTRACT:

This resource includes trace gas data collected at three locations in the Dead Run stream network in Woodlawn, Baltimore County, MD. Dissolved gas species include CH4, N2O, CO2, and N2:Ar. Stream grab samples and ambient air samples are collected biweekly and analyzed for trace gas concentrations at the Cary Institute of Ecosystem Studies. Sampling stations are co-located with USGS stream gaging stations 01589312 (DR5), 01589315 (DR4), and 01589330 (DRKR). Protocols for sampling and analysis follow those of the National Ecological Observatory Network (NEON) and Cary Institute of Ecosystem Studies.

Dissolved gas measurements of streams coupled with groundwater can provide information on integrated source/sink dynamics within the urban critical zone. CO2 concentrations are driven by weathering reactions and biological activity. Nitrous oxide (N2O) is an index of nitrogen enrichment in the landscape. Methane (CH4) and dissolved nitrogen:argon (N2:Ar) indicate presence of anaerobic conditions and nitrogen sinks. Gas data can help determine the interplay between nitrogen inputs and processing in the urban critical zone. For example, high N2O (and nitrate) can provide evidence of a shift from a source-controlled to transport-controlled system. Low N2O (and low nitrate) along with high CH4 and high dissolved N2:Ar also can provide evidence of a similar shift but would suggest the presence of significant anaerobic sinks with implications about water pathways through the urban critical zone.

ABSTRACT:

This resource contains input files required to run ParFlow.CLM and EcoSLIM for Dead Run watershed, Baltimore County, MD. Model resolution for this instance is 40 m in the x-y direction, with variable dz. Both Parflow.CLM (v 3.9) and EcoSLIM (v 1.2) codes can be downloaded from GitHub. An edited version of the particle output file is also included in this resource.

ABSTRACT:

This resource includes water isotope data from Dead Run, Maryland as well as precipitation data collected in Oella, MD. Stream grab samples are collected weekly; 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 01589317 (DR1), 01589316 (DR2), 01589320 (DR3), 01589315 (DR4), 01589312 (DR5), and 01589330 (DRKR). This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.

ABSTRACT:

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.

ABSTRACT:

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 on an ICPMS for 38 dissolved metals and metalloids. 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.

ABSTRACT:

This resource includes shapefiles of spatial features from Pennypack Creek watershed, in Bucks, Montgomery and Philadelphia Counties, PA, USA. These data are frequently used in support of hydrologic observational and modeling studies. Layers include hydrography, watershed and subwatershed boundaries, fraction impervious surface area, and stream gage locations. The stream gage locations correspond to USGS stream gaging stations 01467042 (Pine Road) and 01467048 (Lower Rhawn).

ABSTRACT:

This resource includes shapefiles of spatial features from Anacostia NW Branch watershed in Montgomery and Prince George's Counties, MD, USA. These data are frequently used in support of hydrologic observational and modeling studies. Layers include hydrography, watershed and subwatershed boundaries, fraction impervious surface area, and stream gage locations. The stream gage locations correspond to USGS stream gaging stations 01650500 (Colesville) and 01651000 (Hyattsville).

ABSTRACT:

This resource includes shapefiles of spatial features from Difficult Run in Fairfax County, VA, USA. These data are frequently used in support of hydrologic observational and modeling studies. Layers include hydrography, watershed and subwatershed boundaries, fraction impervious surface area, and stream gage locations. The stream gage locations correspond to USGS stream gaging stations 01645704 (Fox Lake), 01645762 (Vienna), and 01646000 (Great Falls).

ABSTRACT:

This resource includes shapefiles of spatial features from Swift Creek watershed, Wake County, NC, USA. These data are frequently used in support of hydrologic observational and modeling studies. Layers include hydrography, watershed and subwatershed boundaries, fraction impervious surface area, and stream gage locations. The stream gage location corresponds to USGS stream gaging station 02087580 (Apex).

ABSTRACT:

This top-level collection serves as a root location for the five watershed collections of the Urban Critical Zone Collaborative Research: Network Cluster: Anacostia NW Branch, Dead Run, Difficult Run, Pennypack Creek, and Swift Creek.

ABSTRACT:

This collection contains resource data sets for Swift Creek watershed, Wake County, NC, USA.

ABSTRACT:

This collection contains resource data sets for Difficult Run watershed, Fairfax County, VA, USA.

ABSTRACT:

This resource includes stream chemistry for Northwest Branch Anacostia River, Prince Georges and Montgomery Counties, 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 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.

ABSTRACT:

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.

ABSTRACT:

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.

ABSTRACT:

This resource includes stream chemistry for Pennypack Creek, Philadelphia and Montgomery Counties, Pennsylvania. This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network. Stream grab samples are analyzed on an ICPMS for 38 dissolved metals and metalloids. Biweekly stream sampling sites are co-located with USGS stream gaging stations 01467048 (PPRH) and 01467042 (PPPI). Synoptic sampling is carried out along the entire main stem (from PPRH upstream) over the span of several hours after a long dry period, approximately twice per year. 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.

ABSTRACT:

This resource includes total suspended solids (TSS) data for Pennypack Creek, Philadelphia County, Pennsylvania. This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network. Storms are sampled using ISCO samplers to obtain 1-liter samples in 15 - 60 minute intervals over the course of a storm. Samples are filtered and dried in the lab to determine the mass of suspended solids contained in each 1-liter sample, and converted to TSS in mg/L. Sampling sites are co-located with USGS stream gaging stations 01467048 (PPRH) and 01467042 (PPPI). Data are collected for the purpose of comparison with TSS data from other sites in the Urban CZ cluster.

ABSTRACT:

This resource includes nitrate isotope data from Dead Run, Maryland. Stream grab samples are collected biweekly and are analyzed for d15N-Nitrate and d18O-Nitrate. Data are collected for the purpose of cross-site comparison with other sites in the Urban CZ cluster. Stream sampling sites are co-located with USGS stream gaging stations 01589315 (DR4), 01589312 (DR5), and 01589330 (DRKR). This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.

ABSTRACT:

This resource includes nitrate isotope data from Pennypack Creek, Philadelphia, PA. Stream grab samples are collected biweekly and are analyzed for d15N-Nitrate and d18O-Nitrate. Data are collected for the purpose of cross-site comparison with other sites in the Urban CZ cluster. Sampling sites are co-located with USGS stream gaging stations 01467048 (PPRH) and 01467042 (PPPI). This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.

ABSTRACT:

This resource includes nitrate isotope data from Northwest Branch Anacostia River, Maryland. Stream grab samples are collected biweekly and are analyzed for d15N-Nitrate and d18O-Nitrate. Data are collected for the purpose of cross-site comparison with other sites in the Urban CZ cluster. Stream sampling sites are co-located with USGS stream gaging stations 1651000 (NWB1) and 01650500 (NWB2). This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.

ABSTRACT:

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).

ABSTRACT:

Photosynthetically Active Radiation (PAR) data have been collected at multiple sites in Dead Run watershed (near Woodlawn, MD) over variable periods of time since June 2012. The deployed device is a Photosynthetic Light (PAR) Smart Sensor S-LIA-M003 by Onset. The sensor measures light intensity for frequencies relevant to photosynthesis in units of µmol/m2/sec. Sensor specifications are posted at http://www.onsetcomp.com/products/sensors/s-lia-m003. Sensors are configured to collect data at a 5-minute interval. Data are stored in an Onset Microstation Data Logger H21-002 or H21-USB and downloaded manually every 60 days.

ABSTRACT:

This resource includes barometric pressure data measured at several locations in Dead Run watershed, Baltimore County, Maryland. The data have been collected intermittently for various purposes including (1) correction of water pressure for calculating stream water level (pressure head); (2) post-processing of stream CO2 sensor data ; and (3) stream metabolism calculations. Data were collected using a Hobo 13-Foot Water Level Data Logger (Part # U20-001-04, Onset Computer Corp.) deployed in air. Data were collected at a 5-minute interval and downloaded manually every 60 days. The instruments are co-located with stream gaging stations. This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network.