This resource includes the raw data from Analysis of the Influence of Ferricrete on Hyporheic Exchange 
Flows. The general naming convention used in this resource is: FlowRegime_StreamReach_DataType. 

The raw data types included in this resource are: electrical resistivity tomography (DataType = ERT), 
stream gauging (DataType = StreamGauging), fluid electrical conductivity (DataType = FluidEC), water 
chemistry (DataType = WaterChemistry), and slug tests (DateType = SlugTest). 

The electrical resistivity tomography data were collected with an IRIS Syscal Pro unit. Electrode positions 
remained the same between flows, as listed in the respective files. A dipole-dipole array was used. 
Electrodes A, B, M, and N are represented in the file by Spa.1, Spa.2, Spa.3, and Spa.4, respectively. Each 
row in this file represents a quadripole, with Vp representing the voltage measured (mV), In 
representing the current injected (mA), Date representing the time of data collection, and Dev 
representing the error associated with each quadripole (%).

The stream gauging data were retrieved with a HACH flow meter. The files include discretized 
measurements of distance (m), depth (m), velocity (m/s), and discharge (m3/s) for each measurement 
made. It also includes the total discharge (m3/s), the proportion of total discharge that was captured in 
each measurement, and general notes about each measurement.

The fluid electrical conductivity data were collected with a HOBO Conductivity Logger. The files include 
the time of collection, the low range fluid conductivity (uS/cm), full range conductivity (uS/cm), and 
temperature (F or C, as labeled). The low-flow fluid conductivity files also include specific conductivity 
(uS/cm).

The water chemistry data were analyzed using different methods. In-situ measurements of temperature, 
pH, and electrical conductivity were made with the ThermoFisher Orion Star multiparameter meter. 
Reduced iron and dissolved oxygen (DO) concentrations were measured with a HACH DR1900 field-
portable spectrophotometer. Cations and anions were analyzed with the Dionex ICS-2100 ion 
chromatograph. Metals samples were analyzed with a Perkin-Elmer Optima 5300 DV inductively coupled 
plasma-optical emission spectrometer. The file includes measurements of pH (-), DO (mg/L), As (ug/L), 
Fe (mg/L), S181 (mg/L), Pb (ug/L), Al (mg/L), Mn (ug/L), and SO4 (mg/L), including both total 
concentration and dissolved concentration where applicable (as labeled in the file). Samples were 
collected in the stream and in all of the wells in the streambed.

Slug test data were collected by hand with a sounding tape within the 3 wells in the streambed. Slug 
tests were taken in September and November, labeled respectively. The files include the time passed 
since the start of the test (s), the water level measured from the top of casing to water (ft or cm, as 
labeled), and depth of water above initial (cm).