• 责任者：Tao Bingde (Life and Geographical Science College ; Qinghai Normal University ; Xining 810008 ; China) ; Sha Zhanjiang
• 刊名：Arid Land Geography
• 出版年：2013
• 卷期：36(6)
• 关键词：水土流失 ; soil erosion ; 同位素示踪法 ; isotopic tracer methods ; 青海 ; Qinghai Province
• 页码：p.997-1005
• 图表：8 illus., 2 tables, 22 refs.
• 分类号：1800
• issnNo：ISSN1000-6060
• isbnNo：CN65-1103/X

     Being economic, efficient, and reliable, the cesium-137 tracing technique becomes an important method for soil erosion research. Huangshui Basin and Buha River Basin are two adjacent drainage basins. They are both in fluenced by ecological characteristics of plateau-type, desertification and unreasonable human activities, facing a gradually-worsen situation of soil loss. However, they are weak in the respect of soil erosion researches, without field measured data from run-off observation station and difficult to quantify soil erosion intensity. Therefore, cesium-137 tracing method based on soil erosion has embarked on research to look forward to a more objective access to soil ero sion quantitative information of the two adjacent basins. The research shows the following results ： Firstly, the two re gions belong to non-farming soil type, the cesium-137 is mainly distributed in the soil of 10 cm depth and nearly none of cesium-137 is distributed in the soil deeper than 10 cm. Also, its highest concentration is on soil surface and its distribution is exponentially decreasesd from soil surface into its deeper layer. Secondly, there is a positive correlation between the cesium-137 inventory and vegetation coverage with a correlation coefficient of 0.93. It shows that the better the vegetation coverage is, the higher the cesium-137 contents are, and soil erosion phenomenon is not obvious. Thirdly, soil erosion of the two adjacent basins with drought and rare rainfall, warm steppes and high wind velocity, mainly comes from wind erosion while water erosion is weak. Fourthly, the soil erosion modulus in the upper Huangshui River Basin is between 87.62 t. km^-2. a^-1 and 1 458.41 t. km^-2. a^-1 and the average soil erosion mod- ulus is 933.31 t. km^-2. a^-1. The soil erosion modulus in the lower Buha River basin is between 431.03 t. km^-2. a^-1 and 2 072.39  t. km^-2. a^-1 and the average soil erosion modulus is 1 256.97  t. km^-2. a^-1. These data show that there is a more serious erosion in the lower Buha River Basin than that in the upper Huangshui River Basin. Besides, the ma jor areas of these basins are in a mild erosion stage while the northern part of the Huangshui River upstream and the northwest parr of the Buha River downstream are slightly eroded.