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Landscape changes are distinguished into those generated by natural processes and those caused or triggered by human activity (Barsch et al. 1993; Jansky & Urbanova 1994; FavisMortlock et al. 1997; Bork et al. 1998; Voelkel 2005; Bicik & Kabrda 2007; Bicik & Jelecek 2009). The geoarchives do not reveal which of these factors ultimately caused greater soil erosion. Improved dating techniques are necessary to increase the temporal resolution of the sediment records which have clearly increased the level of knowledge in recent years (e.g. Geyh 2005, Kadlec et al. 2009). When examining sediment archives from recent times, we may have the opportunity to identify the factors controlling sediment formation in much more detail (e.g. Junge et al. 2005). This was the case with the natural "experimental setup" at Lake Mladotice (western Czech Republic), where it was possible to analyse a sediment archive dating back to 1872. Since the onset of lake sedimentation, rainfall and runoff have been recorded (in some cases continuously) at monitoring stations located in the surrounding area of the catchment area of the lake (Schulte 2007, Schulte et al. 2007). Air photos from several decades document preand post-communist land use changes in the lake's drainage basin. Furthermore, records exist of fertiliser programmes affecting sediments and hydrochemism. Because of the change in land use, increased soil erosion and a rise in the sedimentation rate were expected. Against this background, our investigations into the lake sediments and the drainage area of Lake Mladotice aim to address the following questions: 1. To what extent has land use changed in the drainage basin of Lake Mladotice since 1872? 2. Has the magnitude or frequency of the rainfall runoff events changed since 1872? 3. To what extent is the sediment record a product of the rainfall runoff events or the change in land use in the drainage basin?

Lake Mladotice in the Western Czech Republic – Sediments as a Geoarchive for Flood Events and Pre- to Postcommunist Change in Land Use since 1872