Application of a Cs-137 fingerprinting technique for interpreting responses of sediment deposition of a karst depression to deforestation in the Guizhou Plateau, China
文献类型：期刊论文
| 作者 | Zhang XinBao1 ; Bai XiaoYong1,3; Liu XiuMing2
|
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2011-03-01 |
| 卷号 | 54期号:3页码:431-437 |
| 关键词 | Cs-137 fingerprinting technique karst depression sediment deposition deforestation response |
| ISSN号 | 1674-7313 |
| 通讯作者 | Bai, XY |
| 英文摘要 | Deforestation to reclaim land often triggers severe soil erosion in the Guizhou Karst Plateau. Cs-137 dating of the deposited sediments in the karst depression bottom was used to estimate soil losses by surface erosion since deforestation started in 1979 on hillslopes in the Shirenzhai catchment, Puding County, Guizhou Province. The catchment has a drainage area of 0.054 km(2). The average Cs-137 contents of the top and peak layers in five cores of the depression bottom (with an area of 2652 m(2)), collected in 2009, were 2.35 and 7.25 Bq kg(-1), respectively. The medium depths in the depression (which ranged between 84 cm and 113.5 cm with a mean value of 92.1 cm) showed the presence of sediments deposited in 1979. The total volume and weight of the deposited sediments since 1979 were estimated to be 1965 m(3) and 2496 t, respectively. The depression bottom can be treated as a temporary impoundment and its sediment trapping efficiency was estimated to be 0.7. The relevant average soil erosion rate on the hillslopes was 2315 t km(-2) yr(-1) since 1979. The mean Cs-137 inventory of the five cores was 7693 Bq m(-2), which was similar to 10 times the local reference inventory of 782 Bq m(-2). The total Cs-137 activity of the sediments in the bottom was 20.4x10(6) Bq, and the relevant Cs-137 inventory loss from the hillslopes was 358 Bq m(-2) (since 1954), which accounted for 45.8% of the reference inventory. As soil erosion was not severe before and after the period of deforestation and following cultivation in 1979-1990, the erosion rates on the hillslopes could potentially reach 7000 t km(-2) yr(-1). |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geosciences, Multidisciplinary |
| 研究领域[WOS] | Geology |
| 关键词[WOS] | LAKE-SEDIMENTS ; LOESS PLATEAU ; SOIL-EROSION ; RATES ; CESIUM-137 ; PROFILES ; RECORDS ; MODEL ; LAND ; BE-7 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000288121700011 |
| 公开日期 | 2013-06-25 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5518]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang XinBao,Bai XiaoYong,Liu XiuMing. Application of a Cs-137 fingerprinting technique for interpreting responses of sediment deposition of a karst depression to deforestation in the Guizhou Plateau, China[J]. SCIENCE CHINA-EARTH SCIENCES,2011,54(3):431-437. |
| APA | Zhang XinBao,Bai XiaoYong,&Liu XiuMing.(2011).Application of a Cs-137 fingerprinting technique for interpreting responses of sediment deposition of a karst depression to deforestation in the Guizhou Plateau, China.SCIENCE CHINA-EARTH SCIENCES,54(3),431-437. |
| MLA | Zhang XinBao,et al."Application of a Cs-137 fingerprinting technique for interpreting responses of sediment deposition of a karst depression to deforestation in the Guizhou Plateau, China".SCIENCE CHINA-EARTH SCIENCES 54.3(2011):431-437. |
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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