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The Cesium-137 technique was used to estimate soil erosion in the Xihanshui River Basin. More than 100 samples were taken from 10 sites and 20 hillslopes with a 10cm diameter hand-operated core driller. Each sample was 60 cm long. The 137 Cs activity was analyzed by gamma spectrometry. The simplified mass balance model and the profile distribution model were used to calculate soil erosion...
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