Dissolved organic carbon of infiltration within the autogenic Karst Hydrosystem

Storm flow flushing in a structured soil changes the composition of dissolved organic matter leached into the subsoil

“…matter into groundwater and surface waters. This is in agreement with observations made in hydrological studies on karst waters (Simmleit and Herrmann, 1987;Emblanch et al, 1998). 3.…”

Changes in water extractable organic matter (WEOM) in a calcareous soil under field conditions with time and soil depth

“…The weak association between water flow and WEOM occurrence in deeper soil layers, which had been shown to correlate positively (Emblanch et al, 1998;Tipping et al, 1999;Mertens et al, 2007), is most likely a consequence of low leachate volumes due to low precipitation frequency during the sampling period (Fig. 1).…”

“…The high hydraulic flow across our soil profile is related to the highly permeable calcite minerals, which constitute ∼90% of its mineral composition (Emblanch et al, 1998). The weak association between water flow and WEOM occurrence in deeper soil layers, which had been shown to correlate positively (Emblanch et al, 1998;Tipping et al, 1999;Mertens et al, 2007), is most likely a consequence of low leachate volumes due to low precipitation frequency during the sampling period (Fig.…”

Contribution of artificial galleries to the knowledge of karstic system behaviour in addition to natural cavern data

“…Organic matter, used as a tracer of fast circulation in karstic systems, associated with chemical components like Mg 2+ , NO 3 -and �iO 2 -concentrations, enables to understand the hydrogeological functioning of the aquifers (Emblanch, 1997;Emblanch et al, 1998aEmblanch et al, , 1998bBatiot et al, 2002;Batiot et al, 2003). TOC mean annual variation ranged from 0.93 mg/l for the B-point to 2,15 mg/l for the GA�-point, in unsaturated zone, and the mean calculated standard deviations vary from 0.19 for the A-point to 0.63 for the GA�-point.…”