WEST Yunnan and central Guizhou with variable altitudes and similar latitudes, located in the Yunnan-Guizhou Plateau of the eastern slope uplifting Himalayas, were selected as study areas in this note. Thetwo areas consist mainly of carbonate rocks discontinuously covered by similar soil types with severe soiland water loss except Lugu Lake catchment. Climate of the study areas is subtropical monsoon, apparently influenced by mingled southeastern monsoon and southwestern monsoon with abundant precipitation.This study is to comparatively describe distribution and inventory of ~7Be and ~(137)Cs in the sediments of Erhai Lake, Lugu Lake and Hongfeng Lake as well as in 28 surface soil profiles of their watersheds.The results have shown that: (i) In all the soil profiles, ~7Be activities decrease exponentially with soil depth. ~7Be apparent ac- WEST Yunnan and central Guizhou with variable altitudes and similar latitudes, located in the Yunnan-Guizhou Plateau of the eastern slope uplifting Himalayas, were selected as study areas in this note. Thetwo areas consist mainly of carbonate rocks discontinuously covered by similar soil types with severe Soiland water loss except Lugu Lake catchment. Climate of the study areas is subtropical monsoon, apparently influenced by mingled southeastern monsoon and southwestern monsoon with abundant precipitation. This study is to comparatively describe distribution and inventory of ~ 7Be and ~ (137) Cs in the sediments of Erhai Lake, Lugu Lake and Hongfeng Lake as well as in 28 surface soil profiles of their watershed. The results have shown that: (i) In all the soil profiles, ~ 7Be activities decrease exponentially with soil depth. ~ 7Be apparent ac -