Present-day erosion rate on the Khangai-Khentei Upland

Abstract

Recent erosion rate within the Khangai-Khentei Upland has been calculated from the solid and chemical (ionic) discharge of rivers in the region. When calculating chemical discharge, salt input by the atmospheric precipitation was taken into account, the rain water mineralization may be as high as 40 to 45 g/l. The author compiled a series of maps showing erosion rate (in isolines) separately for chemical (0.003 to 0.005 mm per year), mechanical (0.004 to 0.008 mm per year) and total erosion (0.006 to 0.008 mm per year). Mean calculated rate of total erosion is about 0.007 mm per year.