ABSTRACT:

This study presents the development of LuKARS 2.0 on an hourly scale. The model concept was modified in comparison to the original model from Bittner et al. (2018) by considering the interaction between matrix and conduit as well as possible surface water bypassing the spring. This allows a flexible conceptualization of binary karst systems characterized by a perennial spring and intermittent overflow. The aim of this study is to investigate the relevance of high-resolution hydrochemical data for the verification and selection of conceptual event-based karst models. The model was tested on the Baget karst system, France, whose recharge area shows the coexistence of karst and non-karst formations. The results of this study shows that despite different model parametrizations simulate the discharge at the spring with comparable accuracy, not all of them match the observed hydrochemical data.

Bittner, D., Narany, T. S., Kohl, B., Disse, M., and Chiogna, G. (2018). Modeling the hydrological impact of land use change in a dolomite-dominated karst system. Journal of Hydrology, 567, 267–279. https://doi.org/10.1016/j.jhydrol.2018.10.017

ABSTRACT:

Hydrochemical data of karst springs provide valuable insights into the internal hydrodynamical functioning of karst systems. We develop a method to retrieve the individual ion concentration time series and their uncertainty at high temporal resolution for karst springs by using continuous observations of electrical conductivity (EC) and low-frequency ionic measurements. The method is tested in two karstic catchments with different lithologies and temporal resolution of the available hydrochemical datasets, i.e., the Kerschbaum dolostone system in Austria and the Baget limestone system in France.
The uploaded data include, for each study area, the location of the spring, the extent of the recharge area, the raw data of electrical conductivity and major ion concentrations as well as the intermediate and final results of the EC decomposition method. The structure of the folders is described in detail in the README.txt file.