70多年来纸坊沟小流域土壤侵蚀演变过程
文献类型：期刊论文
| 作者 | 庞国伟 ; 谢红霞 ; 李锐 ; 杨勤科 |
| 刊名 | 中国水土保持科学
 |
| 出版日期 | 2012 |
| 卷号 | 10期号:03页码:1-8 |
| 关键词 | 土壤侵蚀 soil erosion GIS GIS RUSLE RUSLE 演变过程 changing process 黄土高原 Loess Plateau |
| 其他题名 | Soil erosion dynamics of Zhifanggou Watershed during the past 70 years |
| 中文摘要 | 为了系统研究黄土高原丘陵沟壑区土壤侵蚀演变过程及其规律,以黄土高原纸坊沟流域为例,在GIS的支持下,运用RUSLE估算了该流域1938—2010年间18个年份的年侵蚀量和侵蚀强度,分析了70多年来流域土壤侵蚀时空演变过程。结果表明:1)纸坊沟流域的土壤侵蚀随时间呈四次抛物线变化,侵蚀模数由1938年的7 584.39t/(km2.a)猛增到1958年的4万6 392.56 t/(km2.a),随后总体呈递减趋势,到2010年侵蚀模数降至5 150.80 t/(km2.a)。2)1938年中度以下侵蚀面积占流域总面积的52.99%;1958—1978年以剧烈侵蚀为主,占流域总面积的67.05%,其中1958年高达78.61%;1978—1998年侵蚀强度有所下降,微度侵蚀面积占流域总面积比例达到29.27%;1999年以来,微度侵蚀面积达到3.85 km2,剧烈侵蚀面积仅占流域总面积的8.96%。经过30多年的综合治理,该流域生态环境明显改善,但沟谷陡荒坡侵蚀依然严重,是今后水土流失治理的重点区域。 |
| 英文摘要 | In order to explore the dynamic change of soil erosion in Loess Hilly-gully Area of Loess Plateau，this paper，taking Zhifanggou Watershed as a case study，evaluated the soil erosion change from 1938 to 2010． Combined with GIS technique，the revised universal soil loss equation ( RUSLE) was used to evaluate spatial and temporal change of soil erosion． The results showed that: 1) The soil erosion modulus increased significantly from 7 584. 39t /( km2·a) in 1938 to 46 392. 56 t /( km2·a) in 1958， while it decreased to 5 150. 80 t /( km2·a) in 2010． 2) The area below moderate erosion account for 52. 99% of the whole area in 1938． 3) During the periods from 1958 to 1978，severe erosion account for a major part of the whole area，which was 67. 05%，and the most severe erosion happened in 1958， which account for 78. 61% of the whole area． 4) Soil erosion intensity decreased slightly during the period from 1978 to 1998，the area with slight erosion accounted for 29. 27% of the whole area; the area increased to 3. 85 km2 since 1999，and area severe erosion only account for 8. 96% of the watershed area． As the continuous ecological management over the past 30 years，the eco-environment in Zhifanggou Watershed was improved，but soil erosion in steep slope and gullies are still the key problems in the future conservation． |
| 语种 | 中文 |
| 公开日期 | 2014-06-24 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/5310]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | 庞国伟,谢红霞,李锐,等. 70多年来纸坊沟小流域土壤侵蚀演变过程[J]. 中国水土保持科学,2012,10(03):1-8. |
| APA | 庞国伟,谢红霞,李锐,&杨勤科.(2012).70多年来纸坊沟小流域土壤侵蚀演变过程.中国水土保持科学,10(03),1-8. |
| MLA | 庞国伟,et al."70多年来纸坊沟小流域土壤侵蚀演变过程".中国水土保持科学 10.03(2012):1-8. |
入库方式： OAI收割
来源：水土保持研究所
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