Multiple timescales of streambed flux variability in two perennial mountain-front streams

Streambed fluxes are highly variable through time and space, having a range of implications for stream‐aquifer processes. This study investigated streambed fluxes over a 3‐year study period to characterize short‐ and long‐term variations and related implications for seepage recharge and hyporheic exchange. Time series of streambed fluxes were estimated through Darcy‐based methods using water level and temperature inputs from shallow (<1.5 m) nested streambed piezometers installed in two mountain‐front streams in Colorado, USA. Three predominant temporal scales of variability were characterized: sub‐daily (<1 day), daily (>1 day; <1 year), and interannual (>1 year). Temporal variability was quantified using the median absolute deviation (MAD), a statistical measure that is resistant to extreme values associated with short‐duration events. Sub‐daily variability (MADS‐D) was related to ET, temperature‐induced changes in hydraulic conductivity, and variable stream stage, and ..., This dataset includes 10-minute timeseries (28-SEP-2018 to 28-SEP-2021) of temperature, groundwater level, vertical hydraulic gradient (VHG), Darcy flux (q), temperature dependent hydraulic conductivity (K), barometric pressure, and related metadata for a nested streambed piezometer network located on East Plum and Cherry Creeks in Colorado, USA. , , # **Paper: Multiple timescales of streambed flux variability in two perennial mountain-front streams**

Authors: Kristen Cognac, Michael Ronayne

### Description:

This README file describes the data package accompanying the above publication.

### Files:

* Data folder: Includes seven text files ('.txt') containing comma-separated timeseries datasets.
* Files 'CCA.txt','CCB.txt','PCB.txt','PCC.txt','PCDS.txt', and 'PCMU.txt' correspond to piezometer nest locations with columns:
* Date\_time: date and time stamp of data
* Shal\_Temp\_C: shallow piezometer temperature in degrees Celsius
* Deep\_Temp\_C: deep piezometer temperature in degrees Celsius
* Shal\_Head\_m: shallow piezometer water level relative to streambed in meters
* Deep\_Head\_m: deep piezometer water level relative to streambed in meters
* SDgrad: vertical hydraulic gradient between shallow and deep piezometer
* K: time-varying hydraulic conductivity corrected f...