Former postdoctoral research associate, Dylan Irvine, just published a journal article in Groundwater that provides a synthesis of best practices in heat tracing of SW-GW exchange. Check it out!
Irvine, D. J., Briggs, M. A., Lautz, L. K., Gordon, R. P., McKenzie, J. M. and Cartwright, I. (2016), Using Diurnal Temperature Signals to Infer Vertical Groundwater-Surface Water Exchange. Groundwater. doi:10.1111/gwat.12459