ASSESSMENT OF SOIL LOSS ON UNCULTIVATED SLOPE LAND BY USING ^137CS TECHNIQUE IN THE UPPER YANGTZE RIVER BASIN OF CHINA

编号 zgly0000333981

文献类型 期刊论文

文献题名 ASSESSMENT OF SOIL LOSS ON UNCULTIVATED SLOPE LAND BY USING ^137CS TECHNIQUE IN THE UPPER YANGTZE RIVER BASIN OF CHINA

学科分类 220.1040;森林土壤学

作者 MingyiFENG  XinbaoZHANG  AnbangWEN  XiubinHE 

作者单位 ChinaWestNormalUniversity 

母体文献 International Journal of Sediment Research（国际泥沙研究：英文版） 

年卷期 2004,19(1)

页码 60-65

年份 2004 

分类号 S157.1 

关键词 水土流失  土地利用  评估  长江上游地区 

文摘内容 Radionuclides are used as tracers of sediments in areas where no plot data or field monitoring data are not available. Caesium-137 can provide important information on both soil loss rates and sediment sources. The 137Cs technique is employed to assess soil erosion rates in forest and grass lands in the Upper Yangtze River Basin, China. The study area includes 6 forestlands and 4 grasslands in 8 counties and cities over the eastern part of the basin. The ^137Cs reference inventories ranged from 620.9 Bq m-2 to 2560.3 Bq m^-2. For the 6 forestlands, the average 137Cs inventory over a field ranges from 960.8 Bq m^-2 to 2560.3 Bq m^-2. The average erosion rate is estimated from the ^137Cs measurements between 0 to 588 t km^-2yr^-1. For the 4 grasslands, the average ^137Cs inventory ranges from 119.0 Bq m2 to 869.7 Bq m^-2. The average rate of erosion from grassland varies from 0 to 4435 t km^-2 yrl. Where the erosion was more severe, the ^137Cs inventory was lower. The results showed that there is no clear relationship between ^137Cs inventory, slope length and slope gradient on uncultivated land. The erosion rates for uncultivated land and cultivated land is compared. The result indicates that the erosion rates on uncultivated land is much lower than those on cultivated slopes and the severity of the soil erosion is closely related to vegetation cover。