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Using(137)Cs and(210)Pb(ex)to trace soil erosion rates for a small catchment in the mid-hills of Nepal

文献类型：期刊论文

作者Yuan Yong5,6; Xiong Donghong1,2,5; Wu Han5,6; Liu Lin5,6; Li Wanxin5,6; Chidi Chhabi Lal1,2,3; Dahal Nirmal Mani5,6; Neupane Nilhari4
刊名JOURNAL OF SOILS AND SEDIMENTS
出版日期2020
页码DOI:10.1007/s11368-020-02760-7
关键词Radionuclides Soil redistribution Land use Shrub land Sloping farmland
ISSN号1439-0108
DOI10.1007/s11368-020-02760-7
产权排序1
文献子类Article; Early Access
英文摘要Purpose Soil erosion is a major threat to agricultural sustainability in the hills of Nepal. However, little is known about the soil erosion rates at a small catchment scale in this region. Materials and methods In this study, the soil redistribution rates in a typical small hilly catchment in the Ramechhap District of Nepal were evaluated using the(137)Cs and(210)Pb(ex)tracer techniques. Nine representative slopes under three land uses and a reference site from the gentle sloping forest land within the catchment were selected as sample plots. A downhill transect was built in each sample plot, and soil samples were collected at 5-m intervals along the transects. Results and discussion The results showed that the spatial variations in radionuclide inventory and soil erosion rates measured by(137)Cs measurements were highly consistent with equivalent estimates from(210)Pb(ex)measurements, suggesting the potential for using(137)Cs and(210)Pb(ex)measurements to estimate soil redistribution rates. All(137)Cs and(210)Pb(ex)inventories on the slopes were less than the reference values, indicating that net soil loss has occurred at all of the sampling points. The net erosion rates from sloping farmland (37.08 t ha(-1)year(-1)) and shrub land (32.52 t ha(-1)year(-1)) were significantly higher than those from forest land (14.91 t ha(-1)year(-1)). Furthermore, the soil erosion rates obtained from(210)Pb(ex)measurements were higher than those obtained from(137)Cs measurements, which implies that soil erosion in the catchment was accelerated during the last two decades. The net soil loss from the study catchment was estimated to be 31.29 t ha(-1)year(-1), which is mainly contributed by shrub land (55.08%) and sloping farmland (37.68%). Conclusions These results indicate that shrub land and sloping farmland are vulnerable to erosion, which should be specifically considered in the sustainable management of small agricultural catchments in the mid-hills of Nepal, especially in dry valley regions.
电子版国际标准刊号1614-7480
语种英语
WOS记录号WOS:000567310400002
源URL[http://ir.imde.ac.cn/handle/131551/46294]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者Xiong Donghong
作者单位1.Branch of Sustainable Mountain Development, Kathmandu Center for Research and Education, CAS-TU, Kathmandu 44600, Nepal;
2.Sino-Nepal Joint Research Centre for Geography, IMHE-TU-YNU, Kathmandu 44600, Nepal;
3.Central Department of Geography, Tribhuvan University, Kathmandu 44600, Nepal;
4.International Centre for Integrated Mountain Development, Khumaltar, Lalitpur GPO 3226, Nepal
5.Key Laboratory of Mountain Hazards and Earth Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Resources, Chengdu 610041, China;
6.University of Chinese Academy of Sciences, Beijing 100049, China;
推荐引用方式
GB/T 7714		 Yuan Yong,Xiong Donghong,Wu Han,et al. Using(137)Cs and(210)Pb(ex)to trace soil erosion rates for a small catchment in the mid-hills of Nepal[J]. JOURNAL OF SOILS AND SEDIMENTS,2020:DOI:10.1007/s11368-020-02760-7.
APA Yuan Yong.,Xiong Donghong.,Wu Han.,Liu Lin.,Li Wanxin.,...&Neupane Nilhari.(2020).Using(137)Cs and(210)Pb(ex)to trace soil erosion rates for a small catchment in the mid-hills of Nepal.JOURNAL OF SOILS AND SEDIMENTS,DOI:10.1007/s11368-020-02760-7.
MLA Yuan Yong,et al."Using(137)Cs and(210)Pb(ex)to trace soil erosion rates for a small catchment in the mid-hills of Nepal".JOURNAL OF SOILS AND SEDIMENTS (2020):DOI:10.1007/s11368-020-02760-7.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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