A 1-D analytical method for estimating surface water–groundwater interactions and effective thermal diffusivity using temperature time series
Article first published online: 30 NOV 2012
©2012. American Geophysical Union. All Rights Reserved.
Water Resources Research
Volume 48, Issue 11, November 2012
How to Cite
2012), A 1-D analytical method for estimating surface water–groundwater interactions and effective thermal diffusivity using temperature time series, Water Resour. Res., 48, W11532, doi:10.1029/2012WR012007., , , and (
- Issue published online: 30 NOV 2012
- Article first published online: 30 NOV 2012
- Manuscript Accepted: 21 OCT 2012
- Manuscript Revised: 17 SEP 2012
- Manuscript Received: 20 FEB 2012
- surface water–groundwater interactions;
- thermal diffusivity
 In order to manage surface water (SW) and groundwater (GW) as a single resource, it is necessary that the interactions between them are understood and quantified. Heat, as a natural tracer of water movement, is increasingly being used for this purpose. However, analytical methods that are commonly used are limited by uncertainties in the effective thermal diffusivity of the sediments at the SW-GW interface. We present a novel 1-D analytical method. It utilizes both the amplitude ratio and phase shift of pairs of temperature time series at the SW-GW interface to estimate the Darcy velocity. This eliminates both the need to specify a value for effective thermal diffusivity and the need for iteration. The method also allows for an estimation of effective thermal diffusivity, which can indicate periods where assumptions to the analytical solution are violated. Riverbed temperature data from the Murray Darling Basin (Australia) are used to illustrate the method.