Assessment of sediment deposition rates in a karst depression of a small catchment in Huanjiang, Guangxi, southwest China, using the cesium-137 technique
文献类型：期刊论文
| 作者 | Li, H.1,2; Zhang, X.1,3; Wang, K.4 ; Wen, A.1
|
| 刊名 | JOURNAL OF SOIL AND WATER CONSERVATION
 |
| 出版日期 | 2010-07-01 |
| 卷号 | 65期号:4页码:223-232 |
| 关键词 | deposition rates karst depression small catchment (137)Cs technique south-west China |
| ISSN号 | 0022-4561 |
| 其他题名 | 广西环江喀斯特小流域泥沙沉积速率的137cs法评估 |
| 通讯作者 | H. Li(李豪) |
| 合作状况 | 国内 |
| 中文摘要 | Use of the fallout radionuclide cesium-137 (137Cs) as a tracer has been widely employed for assessment of soil losses and dating of deposited sediment; however, few studies have been conducted in karst environments using this technique. In this study, the 137Cs technique was employed to assess sediment deposition rates in a depression in a small catchment of southwest China. Information derived from the 137Cs measurement of sediment samples collected from a depression in a small catchment in southwest China was used to estimate the sediment deposition rate since 1963, and the rate of soil erosion in the study catchment was also discussed. The results presented in this paper indicated that the depression acted as a sink of soils being eroded from the upland slopes. The mean sediment deposition rate and specific sediment yield of the study depression since 1963 were estimated to be 0.37 cm y?1 (0.15 in yr?1) and 50.2 t km?2 y?1 (0.184 tn ac?1 yr?1), respectively. Analysis of the topographic characteristics of the catchment revealed that the rate of soil redistribution of the catchment was very close to the sediment deposition rate of the depression because no significant sediment accumulation occurred upstream of the depression and in the meantime, very few sediments drained out through the sinkhole with the runoff. Therefore, it was inferred that the rate of soil redistribution in the study area was 55.8 t km?2 y?1 (0.205 tn ac?1 yr?1). Overall, the results revealed that there was a low background rate of soil loss in the karst mountain area suffering from severe land desertification in Southwest China. Furthermore, the results illuminated the potential for use of the 137Cs technique to evaluate the sediment deposition and soil erosion rates in karst areas of southwest China, where limited information regarding soil erosion and sedimentation exists. |
| 英文摘要 | Use of the fallout radionuclide cesium-137 ((137)Cs) as a tracer has been widely employed for assessment of soil losses and dating of deposited sediment; however, few studies have been conducted in karst environments using this technique. In this study, the (137)Cs technique was employed to assess sediment deposition rates in a depression in a small catchment of southwest China. Information derived from the (137)Cs measurement of sediment samples collected from a depression in a small catchment in southwest China was used to estimate the sediment deposition rate since 1963, and the rate of soil erosion in the study catchment was also discussed. The results presented in this paper indicated that the depression acted as a sink of soils being eroded from the upland slopes. The mean sediment deposition rate and specific sediment yield of the study depression since 1963 were estimated to be 0.37 cm y(-1) (0.15 in yr(-1)) and 50.2 t km(-2) y(-1) (0.184 tn ac yr(-1)), respectively Analysis of the topographic characteristics of the catchment revealed that the rate of soil redistribution of the catchment was very close to the sediment deposition rate of the depression because no significant sediment accumulation occurred upstream of the depression and in the meantime, very few sediments drained out through the sinkhole with the runoff. Therefore, it was inferred that the rate of soil redistribution in the study area was 55.8 t km(-2) y(-1) (0.205 tn ac(-1) yr(-1)). Overall, the results revealed that there was a low background rate of soil loss in the karst mountain area suffering from severe land desertification in Southwest China. Furthermore, the results illuminated the potential for use of the (137)Cs technique to evaluate the sediment deposition and soil erosion rates in karst areas of southwest China, where limited information regarding soil erosion and sedimentation exists. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 学科主题 | 水土保持学 ; 环境学 |
| 类目[WOS] | Ecology ; Soil Science ; Water Resources |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Agriculture ; Water Resources |
| 关键词[WOS] | SOIL-EROSION RATES ; LOESS PLATEAU ; OVERBANK SEDIMENTATION ; FALLOUT RADIONUCLIDES ; ACCUMULATION RATES ; RESERVOIR DEPOSITS ; TRAP EFFICIENCY ; DRAINAGE-BASIN ; CS-137 ; RIVER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000280232700006 |
| 公开日期 | 2012-09-20 |
| 源URL | [http://192.168.143.20:8080/handle/131551/4205]  |
| 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, Chengdu, Sichuan, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China 3.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Subtrop Agr, Changsha, Hunan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, H.,Zhang, X.,Wang, K.,et al. Assessment of sediment deposition rates in a karst depression of a small catchment in Huanjiang, Guangxi, southwest China, using the cesium-137 technique[J]. JOURNAL OF SOIL AND WATER CONSERVATION,2010,65(4):223-232. |
| APA | Li, H.,Zhang, X.,Wang, K.,&Wen, A..(2010).Assessment of sediment deposition rates in a karst depression of a small catchment in Huanjiang, Guangxi, southwest China, using the cesium-137 technique.JOURNAL OF SOIL AND WATER CONSERVATION,65(4),223-232. |
| MLA | Li, H.,et al."Assessment of sediment deposition rates in a karst depression of a small catchment in Huanjiang, Guangxi, southwest China, using the cesium-137 technique".JOURNAL OF SOIL AND WATER CONSERVATION 65.4(2010):223-232. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。