Journal cover Journal topic
Proceedings of the International Association of Hydrological Sciences An open-access publication for refereed proceedings in hydrology
Journal topic

Journal metrics

CiteScore value: 0.9
CiteScore
0.9
SNIP value: 0.504
SNIP0.504
IPP value: 0.81
IPP0.81
SJR value: 0.296
SJR0.296
Scimago H <br class='widget-line-break'>index value: 11
Scimago H
index
11
h5-index value: 19
h5-index19
Volume 365
Proc. IAHS, 365, 79–84, 2015
https://doi.org/10.5194/piahs-365-79-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Proc. IAHS, 365, 79–84, 2015
https://doi.org/10.5194/piahs-365-79-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 Mar 2015

02 Mar 2015

Estimation of lacustrine groundwater discharge using heat as a tracer and vertical hydraulic gradients – a comparison

S. Rudnick1,2, J. Lewandowski1,2, and G. Nützmann1,2 S. Rudnick et al.
  • 1Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Dept. Ecohydrology, Müggelseedamm 310, 12587 Berlin, Germany
  • 2Humboldt-University of Berlin, Geographical Institute, Berlin, Germany

Keywords: Lacustrine groundwater discharge, heat as a tracer, groundwater–surface water interaction, lakes, hydraulic heads

Abstract. Lacustrine groundwater discharge (LGD) can play a major role in water and nutrient balances of lakes. Unfortunately, studies often neglect this input path due to methodological difficulties in the determination. In a previous study we described a method which allows the estimation of LGD and groundwater recharge using hydraulic head data and groundwater net balances based on meteorological data. The aim of this study is to compare these results with discharge rates estimated by inverse modelling of heat transport using temperature profiles measured in lake bed sediments. We were able to show a correlation between the fluxes obtained with the different methods, although the time scales of the methods differ substantially. As a consequence, we conclude that the use of hydraulic head data and meteorologically-based groundwater net balances to estimate LGD is limited to time scales similar to the calibration period.

Publications Copernicus
Download
Citation