Effectiveness Assessment of Soil Erosion Critical Source Areas for Soil and Water Conservation
文献类型：期刊论文
| 作者 | Chen Lajiao1; Zhu Axing1; Qin Chengzhi2; Liu Junzhi2 |
| 刊名 | Journal of Resources and Ecology
 |
| 出版日期 | 2012 |
| 卷号 | 3期号:2页码:138 |
| 关键词 | 效益评价 关键源区 SWAT模型 水保措施 |
| ISSN号 | 1674-764X |
| 英文摘要 | Critical source areas (CSAs), characterized by severe soil erosion and high sediment yield, are considered to have a high priority for conservation. How to identify CSAs and assess the effectiveness of conservation practices is a key issue in site-specific watershed management. The Soil and Water Assessment Tool (SWAT) model is a useful tool for site-specific conservation practices design and several studies have attempted to identify CSAs based on watershed models. However, limited research has reported about the effectiveness of conservation practices targeting CSAs. The aim of this study was to assess the effectiveness of conservation pracrices targeted on CSAs using the SWAT model. CSA was firstly identified based on the 4-year average yearly erosion of each HRU. Appropriate soil conservation practices were then designed for the CSAs. A scenario with conservation practices for the whole watershed was also established as the contrasting counter parts scheme and then compared to the outcome of CSA-targeted conservation pracrices. The result shows that SWAT can accurately simulate sediment yield in the study area. CSAs were mainly located in slope farmland areas and steep gullies, coinciding with the distribution of land use and slope. The identified CSA covered 20% of the HRUs and contributed on average 44% of sediment yield. Conservation practices targeting CSAs had higher sediment reduction effectiveness (24 115 t km~(-2) y~(-1)) than conservation practice covering the whole watershed (20 290 t km~(-2) y~(-1)). Thus conservation practices targeting CSAs are more effective than broad conservation practices. We conclude that soil conservation practices focusing on CSAs do increase sediment reduction effectiveness. Targeting the placement of soil conservation practices based on the CSAs concept will assist water quality control in watersheds. |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/153437]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.Institute of Geographic Sciences and Natural Resources Research,CAS 2.Institute of Geographic Sciences and Natural Resources Research, CAS |
| 推荐引用方式 GB/T 7714 | Chen Lajiao,Zhu Axing,Qin Chengzhi,et al. Effectiveness Assessment of Soil Erosion Critical Source Areas for Soil and Water Conservation[J]. Journal of Resources and Ecology,2012,3(2):138. |
| APA | Chen Lajiao,Zhu Axing,Qin Chengzhi,&Liu Junzhi.(2012).Effectiveness Assessment of Soil Erosion Critical Source Areas for Soil and Water Conservation.Journal of Resources and Ecology,3(2),138. |
| MLA | Chen Lajiao,et al."Effectiveness Assessment of Soil Erosion Critical Source Areas for Soil and Water Conservation".Journal of Resources and Ecology 3.2(2012):138. |
入库方式： OAI收割
来源：地理科学与资源研究所
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。