期刊
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
卷 25, 期 1, 页码 351-363出版社
HARD
DOI: 10.15244/pjoes/60490
关键词
soil erosion; spatiotemporal variations; distributed model; returning farmland; Yanhe River watershed
资金
- National Natural Science Foundation of China [51309194]
- Special Research Foundation for Young teachers [2452015374]
- open foundation of the State Key Laboratory
- Institute of Water and Soil Conservation
- Chinese Academy of Sciences
- Ministry of Water Resources [K318009902-1417]
- Doctoral Fund of the Ministry of Education of China [20130204120034]
- Fundamental Research Funds for the Central Universities [QN2013047]
- Initial Scientific Research Funds for PhD from Northwest AF University [2012BSJJ004]
Soil erosion is one of the most important environmental concerns in the hilly and gully region of the Chinese Loess Plateau. In this study, a distributed soil erosion model considering the shallow gully erosion (ephemeral gully erosion) was used to simulate and track soil erosion changes in an easily-eroded watershed from 1985 to 2010. Results indicate that: 1) The distributed soil erosion model based on the RUSLE is suitable for the hilly and gully region of the Loess Plateau and can better improve modeling capabilities for future study of sediment and pollution. 2) The overall soil erosion intensity in the southeast and central parts of the watershed is higher than that of the northwest. The spatiotemporal variations of soil erosion in the whole watershed are largely related to rainfall erosion distribution and land use layout. 3) Effects of returning farmland measures on soil erosion in the Yanhe River upstream are remarkable, and the Panlong River basin needs to further strengthen soil and water conservation measures, and the Yanhe downstream cannot also be ignored in future watershed management planning. 4) Dry land is the critical source area before and after returning farmland in the watershed. The implementation of soil and water conservation measures of dry land is a top priority for soil erosion prevention and control of the watershed. Results may provide scientific reference for erosion identification of critical source areas and land use planning in the loess hilly and gully region.
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