论文摘要
Wind-driven soil erosion results in land degradation, desertification, atmospheric dust, and sandstorms. The Hunshandake Sandy Land, an important part of the Two Barriers and Three Belts project, plays important roles in preventing desert and sandy land expansion and in maintaining local sustainability. Hence, assessing soil erosion and soil accumulation moduli and analyzing the dynamic changes are valuable. In this paper, Zhenglan Banner,located on the southern margin of the Hunshandake Sandy Land, was selected as the study area. The soil erosion and accumulation moduli were estimated using the 137Cs and 210Pbex composite tracing technique, and the dynamics of soil erosion and soil accumulation were analyzed during two periods. The results are as follows:（1） the regional 137Cs reference inventory was 2123.5±163.94 Bq/m2, and the regional 210Pbex reference inventory was 8112±1787.62 Bq/m2.（2） Based on the 137Cs isotope tracing analysis, the erosion moduli ranged from –483.99 to 740.31 t·km-2·a-1. Based on the 210Pbex isotope tracing analysis, the erosion moduli ranged from –441.53 to 797.98 t·km-2·a-1.（3） Compared with the earliest 50 years, the subsequent 50 years exhibited lower soil erosion moduli and accumulation moduli.Therefore, the activities of local sand dunes weakened, and the quality of the local ecological environment improved. The multi-isotope composite tracing technique combining the tracers 137Cs and 210Pbex has potential for similar soil erosion studies in arid or semiarid regions around the world.
论文目录
文章来源
类型: 期刊论文
作者: 胡云锋,张云芝
来源: Journal of Geographical Sciences 2019年10期
年度: 2019
分类: 基础科学
专业: 自然地理学和测绘学
单位: State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, CAS,College of Resources and Environment, University of Chinese Academy of Sciences
基金: Strategic Priority Research Program of CAS,No.XDA19040301,No.XDA20010202,National Key Research and Development Program of China,No.2016YFC0503701,No.2016YFB0501502,Key Project of High-resolution Earth Observation,No.00-Y30B14-9001-14,16
分类号: P931.3
页码: 1655-1669
总页数: 15
文件大小: 738K
下载量: 43
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