Quantifying surface water–groundwater interactions using time series analysis of streambed thermal records: Method development
Article first published online: 11 OCT 2006
Copyright 2006 by the American Geophysical Union.
Water Resources Research
Volume 42, Issue 10, October 2006
How to Cite
2006), Quantifying surface water–groundwater interactions using time series analysis of streambed thermal records: Method development, Water Resour. Res., 42, W10410, doi:10.1029/2005WR004787., , , , and (
- Issue published online: 11 OCT 2006
- Article first published online: 11 OCT 2006
- Manuscript Accepted: 16 JUN 2006
- Manuscript Revised: 24 MAY 2006
- Manuscript Received: 3 DEC 2005
- groundwater/surface water interaction;
- heat as a tracer;
 We present a method for determining streambed seepage rates using time series thermal data. The new method is based on quantifying changes in phase and amplitude of temperature variations between pairs of subsurface sensors. For a reasonable range of streambed thermal properties and sensor spacings the time series method should allow reliable estimation of seepage rates for a range of at least ±10 m d−1 (±1.2 × 10−2 m s−1), with amplitude variations being most sensitive at low flow rates and phase variations retaining sensitivity out to much higher rates. Compared to forward modeling, the new method requires less observational data and less setup and data handling and is faster, particularly when interpreting many long data sets. The time series method is insensitive to streambed scour and sedimentation, which allows for application under a wide range of flow conditions and allows time series estimation of variable streambed hydraulic conductivity. This new approach should facilitate wider use of thermal methods and improve understanding of the complex spatial and temporal dynamics of surface water–groundwater interactions.