DBPapers
DOI: 10.5593/sgem2011/s13.107

EFFECT OF RIVER SAALE ON GROUNDWATER HYDROCHEMISTRY OF THE JENA BIODIVERSITY EXPERIMENTAL FIELD: A HYDROGEOCHEMICAL MODELING APPROACH

AUTHOR/S: S. G. TESSEMA, D. MIRGORODSKY, D. MERTEN, A. HILDEBRANDT, S. ATTINGER, G. BUECHEL
Monday 1 August 2011 by Libadmin2011

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 2, 807-814 pp

ABSTRACT

The effect of biodiversity on ecosystem function is complex and requires understanding
of all interacting systems, such as hydrology, geology and above ground plant diversity
of the study area. In this study hydrogeochemical modeling using PHREEQC was used
to investigate the effect external factors (nearby river Saale and an underground
channel) on the groundwater chemistry of a large grassland diversity experiment (Jena
experiment). Groundwater chemical analysis was performed for river Saale and
groundwater wells which are far from the river (least affected by river) and from wells
which are near to the river (suspected to be affected by the river). We also measured
piezometric heads from 12 groundwater wells and used to delineate groundwater flow
direction. The result shows that there is no significant effect of river Saale on the
groundwater chemistry of the study area at mean river flow. However, Fe, K, Ca, Cl, Mg, Mn, SO42- and NO-3 concentrations of the groundwater increased significantly when the inflow of the river increases toward the groundwater of the study area. Chloride
concentration (used as hydrologic tracer) measured at the inlet of the channel and in groundwater shows that the channel did not leak and therefore has no effect on the groundwater.

Keywords: Hydrogeochemical modeling, PHREEQC, Groundwater, Saale River

PAPER 2011/s13.107: EFFECT OF RIVER SAALE ON GROUNDWATER HYDROCHEMISTRY OF THE JENA BIODIVERSITY EXPERIMENTAL FIELD: A HYDROGEOCHEMICAL MODELING APPROACH

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