Erosion processes and landform evolution on agricultural land - New perspectives from caesium-137 measurements and topographic-based erosion modelling
文献类型：期刊论文
| 作者 | Zhang, XB
|
| 刊名 | EARTH SURF PROC LAND
 |
| 出版日期 | 1997 |
| 卷号 | 22期号:9页码:799–816 |
| 关键词 | landform evolution caesium-137 soil erosion erosion modelling water erosion tillage erosion China Loess Plateau Belgium |
| 通讯作者 | Quine, TA |
| 英文摘要 | Despite growing interest in soil erosion on agricultural land, relatively little attention has been paid to the influence of erosion processes on the pattern of contemporary landform evolution. This in part reflects the problems associated with upscaling the results of short-term process studies to temporal and spatial scales relevant to the study of landform evolution. This paper presents a new approach to examining the influence of erosion processes on landform evolution on agricultural land which employs: caesium-137 (Cs-137) measurements to provide medium-term (c.40 years) estimates of rates of landform change; experimental data and a topographic-based model to simulate soil redistribution by tillage; a mass-balance model of Cs-137 redistribution to separate the water erosion and tillage components of the Cs-137 'signatures'; and field observations of water erosion for validation. This approach is used to examine the relative importance of water erosion and tillage processes for contemporary landform evolution at contrasting sites near Leuven, in Belgium, and near Yanan, in Shaanxi Province, China. This application of the approach provides good agreement between the derived water erosion rates and field observations, and hitherto unobtainable insights into medium-term patterns and rates of contemporary landform evolution, At Huldenberg in Belgium, despite rill incision of slope concavities and ephemeral gully incision of the valley floor, contemporary landform evolution is dominated by infilling of slope and valley concavities (rates >0.5 mm a(-1)) and gradual lowering of slope angles as a result of tillage. In contrast, at Ansai (near Yanan) the slope is characterized by increase in slope angle over most of the length, recession of the steepest section at a rate >5 mm a(-1) and by increasing planform curvature, At this site, contemporary landform evolution is dominated by water erosion. The constraints on the approach are examined, with particular attention being given to limitations on extrapolation of the results and to the sensitivity of the models to parameter variation. (C) 1997 by John Wiley & Sons, Ltd. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-06-21 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5422]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） |
| 推荐引用方式 GB/T 7714 | Zhang, XB. Erosion processes and landform evolution on agricultural land - New perspectives from caesium-137 measurements and topographic-based erosion modelling[J]. EARTH SURF PROC LAND,1997,22(9):799–816. |
| APA | Zhang, XB.(1997).Erosion processes and landform evolution on agricultural land - New perspectives from caesium-137 measurements and topographic-based erosion modelling.EARTH SURF PROC LAND,22(9),799–816. |
| MLA | Zhang, XB."Erosion processes and landform evolution on agricultural land - New perspectives from caesium-137 measurements and topographic-based erosion modelling".EARTH SURF PROC LAND 22.9(1997):799–816. |
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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