Sediments of the meteorite lake Rabiga-Kul (Republicof Tatarstan)
The article describes the composition and main properties of surface and stratified bottom sediments of the meteorite lakeRabiga-Kul located in the protected zone of the UNESCO World Heritage site -the Bulgarian historical and archaeological complex. Anthropogenic load on the lake catchment led to a significant accumulation of pollutants in bottom sediments. As a result of siltation and growth of thelake productivity over the last 50 years its average depth decreased by 1 m. The current rate of lake sedimentation is 16 mm per year, which is 3 times higher of the average for the region. While maintaining the current silting rate, the volume of the reservoir is projected to decrease by 9% within 20 years.